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Detection and Identification of Change in Naturalistic Scenes Stephen Mondy; Veronika Coltheart
To link to this article: DOI: 10.1080/135062800394810 URL: http://dx.doi.org/10.1080/135062800394810
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7 Detection and Identification of Change in Naturalistic Scenes
Stephen Mondy and Veronika Coltheart Macquarie University, Sydney, Australia
Research using change detection paradigms has demonstrated that only limite d scene informatio n remains available for conscious report following initia l inspection of a scene. Previous researcher s have found higher change identifica- tion rates for deletions of parts of objects in line drawings of scenes than addi- tions. Other researchers , however, have found an asymmetry in the opposite directio n for addition/deletion of whole objects in line drawings of scenes. Experiment 1 investigated subjects’ accuracy in detecting and identifyin g changes made to successive views of high quality photographs of naturalisti c scenes that involved the addition and deletion of objects, colour changes to objects, and changes to the spatial location of objects. Identificatio n accuracy for deletions from scenes was highest, with lower identificatio n rates for object addi- tions and colour changes, and the lowest rates for identificatio n of location changes. Data further suggested that change identificatio n rates for the pres- ence/absence of objects were a function of the number of identical items present in the scene. Experiment 2 examined this possibility further, and also investi- gated whether the higher identificatio n rates for deletions found in Experiment 1 were found for changes involving whole objects or parts of objects. Results showed higher identificatio n rates for deletions, but only where a unique object was deleted from a scene. The presence of an identical object in the scene abol- ished this deletion identificatio n advantage. Results further showed that the dele- tion/addition asymmetry occurs both when the objects are parts of a larger object and when they are entire objects in the scene.
Please address all correspondence to S. Mondy, Psychology Dept., School of Behavioural Sci- ences, Macquarie University, Sydney, NSW 2109, Australia. Email: [email protected]
This research was conducted in partial fulfilment of a doctoral degree by Stephen Mondy un- der the supervision of Veronika Coltheart. We thank Robyn Langdon and Elisa Cheng for helpful comments and suggestions. We are also grateful to Dan Simons and two anonymous reviewers for their constructive suggestions on earlier versions of this paper.
Ó 2000 Psychology Press Ltd
VISUAL COGNITION, 2000, 7 (1/2/3), 281–296
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People fail to detect large changes in successive views of scenes, despite lengthy inspection times, when the changes are effected: During saccades (Ballard, Hayhoe, & Pelz, 1995; Blackmore, Brelstaff, Nelson, & Troscianko, 1995; Grimes, 1996; McConkie & Currie, 1996); or following brief repeated masking fields (Rensink, O’Regan, & Clark, 1995); or where concurrent, but unrelated, transient motion is present (O’Regan, Rensink, & Clark, 1996); or during other occlusion events (Levin & Simons, 1997; Simons, 1996). (See Simons & Levin, 1997, for a review.)
Grimes (1996), for example, showed subjects photographs for 10 sec, osten- sibly for recall. During a previously determined saccade, a change occurred to an object’s colour, size, location, or orientation, or an object was removed from or added to the scene. The subjects’ task was to detect any change. Surprisingly, many subjects failed to detect large changes to the scenes, including, for exam- ple: Two men exchanging hats of different colours and styles (100% failure rate), a prominent building in a city skyline becoming 25% larger (100%); two cowboys sitting on a bench exchanging heads (50%).
Simons (1996) presented subjects with arrays of five photographs of com- mon objects in a nine-cell matrix for two sec. One of three changes could occur after an ISI of four sec: An item was replaced by a new one; two items exchanged positions or an item moved to a previously empty matrix cell (Con- figuration Change). A series of experiment s with photographs of real objects, novel shapes, and photographs with a verbal shadowing task, showed that memory for the spatial configuration of objects was high in all conditions, but that memory for object identity was poor, particularly when verbal labelling was suppressed by concurrent articulation . These data suggest that memory for spatial information is “directly visual” and encoded automatically , whereas abstraction of identity information requires more effortful encoding, attention, and verbal labelling.
Agostinelli, Sherman, Fazio, and Hearst (1986) proposed that change recog- nition involved two stages: An initial awareness of change (detection ) followed by a specificatio n of the nature of the change (identification) . They argued, fol- lowing Tversky (1977), that the comparison process begins with features in the subject of the comparison and involves a search for these in the referent. If sub- jects are told in advance about the detection and identificatio n task, then they are likely to focus extra attention to the specific features of the initial stimulus, which will then serve as the subject of the comparison. Thus, deletions should be easier to detect than additions because the deleted feature is present in the subject of the comparison. Likewise, deletion of a recently attended and encoded feature should be easier to identify than the addition of an unencoded feature present only in the second, referent stimulus. These predictions were confirmed in two experiments in which the stimuli were simple schematic drawings of a common object (or a nonsense figure for which different
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predictions were made). The change occurred to one discrete feature such as a bumper bar on the car drawing. It is not apparent whether the same processes would be used in the identificatio n of additions and deletions to objects in natu- ral, photographed scenes in which more than one real object is present in a background that contains more features than did the blank field used in Agostinelli et al.’s (1986) experiments.
The addition or removal of whole objects in scenes was studied by Miranda, Jackson, Bentley, Gash, and Nallan (1992) who showed kindergarten (5–6-year-old) and second-grade (7–8-year-old) children line drawings of scenes containing several objects displayed against a simple background. Unlike Agostinelli et al. (1986; Exp. 2), they found a superiority for identifica- tion of additions in a recognition test. Similarly, with adults, Nallan et al., (1994), using the same methodology, and type of line drawings, also found better identificatio n performance for additions of whole objects than deletions. In a further experiment Nallan et al. (1994), using close-up photographs, again found that identificatio n of (whole object) additions was significantly better than that of deletions. (That experiment, however, differed from those using line drawings, in that subjects were asked to identify six objects added/deleted from a single scene: A dinner place-setting comprising a tabletop and 15 dis- crete objects.) Thus, there may be an asymmetry in detecting additions and deletions depending on whether a whole object or part of an object is added to or deleted from a scene.
It has been shown that when realistic drawings or photographs of scenes are presented, people rapidly comprehend the gist of the scene using higher order, schematic knowledge (Biederman, Mezzanotte, & Rabinowitz, 1982). How- ever, Johnston and Hawley (1994) argued that schematic, higher order knowl- edge enhanced immediate comprehension of a scene at a cost of inhibiting the processing of lower order perceptual detail. Thus, the automatic activatio n of higher order information that allows us immediatel y to perceive that an object is a car, may inhibit our ability to register the lower order detail required to per- form a change detection and identification task.
Support for this argument comes from Pezdek and colleagues (Pezdek, 1987; Pezdek & Chen, 1982; Pezdek et al., 1988), who proposed an asymmetric confusability effect in picture recognition. They hypothesized that both com- plex and simple versions of pictures were schematicall y encoded such that rep- resentations in memory were more likely to match the simple version of a picture. They found that subjects shown a simple version of a line drawing were better at rejecting a complex distractor (that included extra detail, shading, and elaboratio n to both figure and background of the simple picture) than when shown a complex picture and tested with a simple distractor.
Simons’ (1996) research indicated that focused attention and systematic verbal labelling are used to register detail in the first stimulus. This leads to
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the prediction that changes in easily labelled features should be easier to detect and identify than changes that are difficult to label such as a change in an object’s location when that change does not alter the global configuration of the entire scene. Additionally, the research of Agostinelli et al. (1986) sug- gests that a deleted object (that is part of a larger object) will be easier to detect and identify than an added object (that is part of a larger object), but that the addition of a whole object (Miranda et al.,1992; Nallan et al., 1994) should be easier to detect than the deletion of a whole object. Finally, the sug- gestions of Johnston and Hawley (1994) lead to the expectatio n that change to a lower order perceptual feature of an object, such as colour, would be less readily recognized than removal of that entire object when the object’s colour was not a defining feature. A change to the colour of a (yellow) lemon, for example, could render it an unripe lemon (green), a rotten lemon (brown), or an unreal or painted lemon (blue), whereas a change in the colour of other types of objects (e.g. a bow) does not alter its meaning to the same degree, and the colour changes made in Experiment 1 were of the latter type, namely colour changes to objects that are found in a variety of colours in the environment.
Thus, Experiment 1 investigated detection and identificatio n rates of the fol- lowing types of changes in natural scenes across successive views: Addition and deletion of objects, object colour and location changes. These four types of change were made to the same object in each scene, but subjects saw only one of the changed versions. Thus, one subject saw an object change colour, another saw its location change, and so on. Additions and deletions involved the same stimuli shown in different order, and these changes are therefore more directly comparable than are changes in colour or location.
Changes in colour involved a hue already present in the scene, so that the change would not “pop out” as a colour singleton, and the colour was plausible for the object. Location changes preserved the position of the object in depth relative to the camera position so that the retinal image and perceived size of the object were unchanged. Although we cannot be certain that the four types of changes were equivalent in detectabilit y and salience, a subsidiary experiment in which the masking field was removed showed that detection rates for the four types of change did not differ significantly (as is noted in the Results section). The experiment also explored the effects of addition and deletion to scenes con- taining an identical object. For example, were subjects better at detecting change if a bowl (say) appeared de novo in a laundry scene, than if the bowl appeared in the scene where an identical bowl was already present? An earlier pilot experiment had suggested that the addition of a new object to a scene was more easily detected than was the addition of a second instance of an already present object. This appeared also true for deletions, which were more likely to be detected when a unique object was removed than when one of a pair of iden- tical objects disappeared.
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EXPERIMENT 1
Method
Subjects. 48 Macquarie undergraduates (15 male, 33 female; mean age = 20.1 years) participated for course credit. All reported normal or cor- rected-to-normal vision.
Stimuli and Apparatus. Subjects (tested individually or in pairs) viewed 16 unchanged scenes, 16 filler changed scenes, and 16 “critical ” changed scenes (A list of the stimuli is given in the Appendix.) The photographs were selected from a large commerciall y available corpus of stock digital photographs of scenes varying in subject matter (Corel Corporation, 1994), in 8-bit GIF87A file format. The unchanged scenes and fillers varied in visual area, the largest 19.6 × 13.1 cm (subtending a visual angle of 14.6 × 9.9 degrees), the smallest 11.8 × 14.7 cm (subtending 8.9 × 11.1 degrees of arc). Filler changed scenes were included to increase the number and types of scenes and changes, and to distribute the experimental items across trials. Stimuli were presented by means of Microsoft Powerpoint (Microsoft Corporation, 1995) on a Pentium (200 MHz) personal computer with a 17-inch SVGA (1024 × 768) monitor at a dis- tance of approximately 75 cm in a dimly-lit room. The second photograph of a changed pair was produced by digitally altering the first photograph using Corel Photo-Paint (Corel Corporation, 1994) software. An object in the original scene was added, deleted, “moved”, or changed in colour (Panels A–D in Figure 1). The critical changed scenes were similar in style and content to the unchanged scenes and fillers, though more uniform in area (the largest 20.3 × 13.5 cm, sub- tending a visual angle of 15.1 × 10.2 degrees; the smallest 19.3 × 12.8 cm (sub- tending 14.4 × 9.7 degrees of arc). Critical changed scenes were selected so that all four types of change could be made within the same scene. Changes were not made so that the appearance , disappearance, or movement of an object caused an existing object to be obscured or a new object to be revealed. Scenes con- tained other single or duplicate objects that were not the subject of change.
The changes were factorially manipulated across stimuli: The set of 16 “crit- ical” changed stimuli were devised so that each “critical ” stimulus could be subjected to all four types of change. Thus, four changed forms of each stimulus were constructed. The originals and one changed form were assigned to one of four different lists of the stimuli in such a way that equal numbers of each type of change occurred and an original stimulus (and its changed form) occurred only once in a list. Furthermore, half the addition and deletions in critical changed stimuli involved a unique object, and half involved a pair of identical objects.
Design and Procedure. The stimulus sequence consisted of a yellow field that filled the screen and displayed the stimulus number for four sec, then the
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286
FIG. 1. Examples of stimuli: A vs. B, Duplicate Addition; B vs. A, Duplicate Deletion; A vs. C, Col- our Change; A vs. D, Location Change; A vs. E, Unique Deletion; E vs. A, Unique Addition. Panels A, B, C, and D were stimuli in Experiment 1. Panels A, B, and E were stimuli in Experiment 2. Note that in both experiments the stimuli were in colour.
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first photograph was displayed for 5 sec, a blue patterned mask followed for 1 sec, and then, either the first photograph or an altered version was shown for a further 5 sec. The yellow field displaying the stimulus number of the next stim- ulus immediately followed. Subjects responded to each stimulus pair by ticking one of two boxes: “No Change”, or “Change” on a numbered response sheet, and described (in no more than a sentence) the form of change if any had occurred.
Subjects were instructed to remember the first photograph, the four types of change were described and illustrated with examples, and they were informed that two-thirds of the test stimuli changed. The sequences were counterbal- anced so that, for half the subjects, the order of presentation of each pair was reversed.
Results and Discussion
Mean correct “Same” response to unchanged scenes was 82%. Change detec- tion and change identificatio n data are shown in Table 1, but as both yielded the same pattern of significant effects, only the analyses of change identificatio n performance are reported. A stringent scoring criterion was used for change identification , so that a trial was scored as correct only if the correct change object and the correct type of change was identified by the subject. Change identificatio n scored using this criterion eliminate s instances where subjects detect change, but the wrong type of change, or attribute the correct type of change to the wrong object, or attribute the wrong type of change to the wrong object.
Mean filler scene change identificatio n was 38%. Mean percentage change identificatio n for critical changed scenes in each condition is shown in Table 1. As it was possible that the four types of change may have differed in detectabilit y and/or salience, Table 1 also shows the results of a subsidiary control experiment in which 12 subjects were presented the changed scenes without an intervening mask to obscure motion and other transients. Change
DETECTION AND IDENTIFICATION OF CHANGE 287
TABLE 1 Mean percentage correct change identification and detection rates for critical changed scenes in each condition in Experiment 1 (n = 48) and
Control Experiment (n = 12)
Change Addition Deletion Colour Location
Change identification 51 (29) 66 (25) 43 (30) 31 (28) Change detection 66 (29) 81 (20) 57 (30) 53 (30) Control change identification 81 (19) 77 (13) 79 (18) 76 (12) Control change detection 91 (11) 90 (10) 80 (17) 95 (8)
Standard deviations are shown in parentheses.
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identificatio n rates in the control experiment varied between 76% and 81% and did not differ significantly for the four types of change (F < 1). Thus the addi- tions, deletions, colour, and location changes were comparable in detectability , and were readily identified with similar levels of accuracy when motion tran- sients and other cues were available . Although this experiment was based on a smaller sample of subjects, the standard deviations were much lower than they were in Experiment 1, further demonstrating the ease with which the changes were identified. We note, however, that, salience may partly be determine d by the capacity of a change to trigger the motion detection system, and that all four types of change may not have been equivalent in this respect.
Correct change identificatio n responses in Experiment 1 were subjected to a three-facto r ANOVA with stimulus direction (original first/second) and type of change (addition, deletion, colour, location) as within-subjects factors and list (1, 2, 3, 4) as a between-subjects factor. A comparable item analysis with stim- uli as the random factor was also performed. The results of the analyses by sub- jects are reported as F1, and those by items as F2. (Effects that are significant by items as well as by subjects are unlikely to be caused by one or two atypical stimuli, and hence effects significant in both analyses are more likely to gener- alize to other stimuli; Clark, 1973.) These analyses showed a significant main effect of Type of Change: F1(3,90) = 15.59, MSE = 1.03, p < .001; F2(3,78) = 9.61, MSE = .46, p < .001, with no other main effects or interaction s significant.
Planned comparisons using the Dunn–Bonferroni adjustment for the num- ber of tests yielded a critical mean difference of 9.2%. These comparisons showed that correct change identificatio n was significantly more likely for deletions (where a previously presented object disappeared in a subsequent view) than for additions of an object. Identification of an addition of an object and of a colour change to an object did not differ significantly . Location changes were significantly less likely to be identified than were additions and colour changes. Detection of location changes was much lower in Experiment 1 than Simons (1996) found for configurational changes in spatial arrays (mean approximately 95%, across five experiments). The location changes in this experiment may have been much more difficult to detect, because they occurred against a naturalistic scene background and did not change the overall scene outline, whereas Simons’ location changes effected a change in the global configuration of the matrix. Further, if, as Simons (1996) found, subjects were covertly naming items during the first stimulus, and relying on this object “list” at test, verbal encoding of colour should increase change identificatio n because the changed object’s colour name will differ. Location is less likely to be verbally encoded in any precise way, and is thus less likely to be identified when changed.
As noted earlier, additions and deletions included instances in which a unique object in the scene was removed or added, and scenes in which one of a pair of identical objects was removed, or a second identical object was added to
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the scene. Change identificatio n for these two types of additions and deletions was separately examined.
Mean percentage change identificatio n for unique object additions and dele- tions and duplicate object additions and deletions are shown in Table 2.
1 There
was a significant effect of the Type of Change: F1(3,40) = 4.21, MSE = 0.30, p < .01. A planned comparison showed that additions of a new item were more likely to be detected than a second exemplar of an object already present in the scene: F1 = 5.47, p < .02. For deletions, the removal of a single object from a scene was more likely to be detected than was the removal of one of a pair of identical objects, but this difference was not statistically reliable: F1 = 3.53, p < .07.
The failure of subjects to detect changes involving the second of two identi- cal items in a scene might be due to repetition blindness, or to a Ranschburg effect (Jahnke, 1969). Repetition blindness (RB) is a phenomenon where sub- jects fail to detect the second instance of an item in a list serially presented at rates of 6–10 items per second. Kanwisher (1987) proposed that RB arises through limits on a process of token individuation required to establish report- able episodic memories of visual stimuli. If an identical stimulus follows the first, the second item fails to be encoded as a separate instance.
Subjects in Experiment 1 searched for scene information likely to change. If the scene was sampled by subjects at sufficiently high fixation rates, and with small lags between fixations of identical objects, then some degree of RB could have occurred for those identical items. Alternatively , difficulties in identify- ing deletions and additions of duplicate s may reflect a Ranschburg effect (Jahnke, 1969), a difficulty in recalling repeated items, which operates over a
DETECTION AND IDENTIFICATION OF CHANGE 289
1 Two of the critical changed scenes were removed from the analyses. These were scenes in the
unique item change groups in which an object similar to the object of change was present in the background (e.g. in a scene with a man holding the change object, an oar, another oar was present).
TABLE 2 Mean percentage correct change identification rates for additions and
deletions to scenes in Experiment 1
Number of Identical Objects in Scene (following Addition, or before Deletion)
—————————————————————— One Two
—————————— —————————— Addition Deletion Addition Deletion
Mean % change identification 56 (22) 69 (23) 35 (31) 54 (23) Mean % change detection 70 (31) 84 (20) 54 (32) 71 (18)
Standard deviations are shown in parentheses.
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longer time course, and is observed in STM list recall. Subjects may have had difficulty in recalling the number of objects of each type in the initial stimulus.
However, the scenes and objects differed for the unique object and duplicate object additions (and the unique object and duplicate object deletions). Conse- quently, differences between these types of changed scenes might have been due to other differences between the scenes and the objects. Therefore, Experi- ment 2 was designed to examine the effects of additions and deletions of unique and duplicate objects in the same scenes with the same set of objects. Thus, there were the following versions of a woman standing in a doorway (Figure 1): In the unique object conditions her dress had one bow (panel A) or no bows (panel E), and in the duplicate condition the dress had two bows (panel B) or one bow (panel A). Additionally, the object added or deleted in Experiment 2 was part of a larger object (bow on a dress, chimney on a building), or was a whole object (a bus, a glass of wine). The inclusion of the part–whole variable was intended to examine whether the asymmetry in identifying additions and deletions extended to entire objects (Miranda et al., 1992; Nallan et al., 1994), or was confined to changes involving features of objects as in Agostinelli et al.’s (1986) study.
EXPERIMENT 2
Method
Subjects. 36 Macquarie undergraduates (8 male, 28 female; mean age = 20.7 years) who had not participated in Experiment 1 participated in exchange for course credit. All reported normal or corrected-to-norma l vision.
Stimuli and Apparatus. Subjects were shown 48 picture pairs (see Appen- dix for a list of stimuli). Subjects saw the same 16 unchanged scenes used in Experiment 1. The 16 filler changed scenes came from Experiment 1 and a pilot experiment. The 16 critical changed stimuli were a modified sub-set of those used in Experiment 1 plus some newly created stimuli.
In Experiment 1, unique and duplicate additions (and unique and duplicate deletions ) were made to different stimuli. Note that in Experiment 2, unique and duplicate additions (and unique and duplicate deletions) were made to the same stimuli (compare panels A, B, and E in Figure 1). In the addition condition, a unique object was added to a scene, or an object was added to a scene already containing an identical object. Deletions were effected by reversing stimulus pair order.
Half the additions/deletions were of objects that formed part of a larger object and half were whole objects. Changes were not made to whole objects that changed the meaning of the scene nor to parts of objects that changed the meaning of the object. Whole objects and part objects that were changed were
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similar in magnitude: Mean whole object size was 2.60% of the scene (SD 1.93); mean part-object size was 2.73% (SD 2.40) of the scene. Objects and part-objects subject to change were also similarly located within the scene (foreground/background) and on the screen (half appeared in the upper half of the scene and half in the lower half of the scene in both conditions). The same apparatus as that of Experiment 1 was used.
Design and Procedure. The procedure was the same as that of Experiment 1. The design included three within-subjects factors: Type of Object (part, whole), Stimulus Number (one, two), and Type of Change (addition, deletion).
Results and Discussion
The mean percentage s of change identificatio n and detection for additions and deletions of unique and duplicate objects, and for whole objects and parts are shown in Table 3. ANOVAs in which subjects and items were the random fac- tors yielded the following significant effects. Changes to whole objects were more frequently identified (61%) than were changes to objects that were part of a larger object (43%): F1(1,35) = 18.332, MSE = 24383.7, p < .0002; but the dif- ference was not reliable in the by-item s analysis, F2(1,14) = 3.054, MSE = 5419.7, p = .10. Type of Object (part/whole) did not interact with any other variable, F1(1,35) = 1.973, MSE = 1050.35, p > .16; F2 < 1. Deletions were more likely to be identified (57.6%) than were additions (46.9%): F1(1,35) = 7.062, MSE = 8342.0, p < .02, F2 (1,14) = 5.724, MSE = 1853.8, p <.05. The interaction between the Type of Change (addition/deletion) and the Number of Objects: 1 or 2 (present after addition, or before deletion) was significant by subjects,
DETECTION AND IDENTIFICATION OF CHANGE 291
TABLE 3 Mean percentage correct change identification rates for additions and deletions to
scenes in Experiment 2
Number of Identical Objects in Scene (following Addition, or before Deletion)
——————————————————————————— One Two
———————————— ———————————— Addition Deletion Addition Deletion
Change identification Mean % 43.0 (31.7) 62.5 (30.0) 50.7 (35.1) 52.8 (37.4) Parts 34.7 (31.2) 58.3 (32.7) 40.3 (35.5) 38.9 (36.1) Whole Objects 51.4 (30.4) 66.6 (26.7) 61.1 (31.9) 66.6 (33.8)
Change detection Mean % 60.4 (33.5) 75.0 (27.8) 63.9 (36.8) 69.4 (36.1) Parts 48.6 (32.7) 70. 8 (30.2) 56.9 (39.9) 58.3 (38.7) Whole Objects 72.2 (30.3) 79.2 (25.0) 70.8 (32.5) 80.6 (29.9)
Standard deviations are shown in parentheses.
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F1(1,35) = 5.978, MSE = 5425.3, p < .02; although marginal by items, F2(1,14) = 3.788, MSE = 1205.9, p < .08. Comparisons of single and double addi- tion/deletions showed the identificatio n advantage for deletions was confined to scenes containing a single instance of the deleted object, F1 = 14.999, p < .001; F2 = 9.502, p < .01. When a scene contained a pair of identical objects, deletion of one was no more likely to be identified than was the addition of a second instance of an object already present in the scene (F1, F2 < 1).
These results confirmed the findings of Agostinelli et al. (1986), namely that the deletion of a unique object from a scene is much easier to identify than is the addition of an object not present in the first scene. Our results extend the gener- ality of their findings two ways. First, Experiment 2 showed that the dele- tion/addition asymmetry applies to real scenes of considerably greater complexity (and ecologica l validity) than their line-draw n cartoon-like objects. It also demonstrated that the deletion/addition asymmetry occurs both when the objects are parts, or features, of a larger object and when they are entire objects in the scene. This asymmetry is in the opposite direction to the findings of Miranda et al. (1992) and Nallan et al. (1994), who found a whole object addi- tion superiority using line drawings. However, Miranda et al. (1992) and Nallan et al. (1994), used much longer inspection durations (10–30 sec) and test durations (up to 45 sec) compared to our 5-sec and Agostinelli et al.’s (1986) 7-sec inspection and test intervals. It is unclear, however, how such differences could result in a reversal in the direction of the deletion/addition asymmetry.
The results of Experiment 2 did not support our finding in Experiment 1 of an increased difficulty in identifying the addition of an identical object over the addition of a novel object. Experiment 2, however, directly compared these types of changes using a larger set of stimuli and directly contrasted the effects of adding and deleting the same novel and duplicate objects to the same scenes and the results obtained from this factorial manipulatio n are thus likely to be more reliable.
GENERAL DISCUSSION
Studies of change detection have demonstrated that we retain little information across successive views of scenes. It appears that information unattended or unabstracted from a scene in one view is unlikely to contribute to detection of changes to that information in a second view. It was found, in both Experiments 1 and 2, that identificatio n of object removal was more likely than identificatio n of object addition, suggesting that attention and verbal encoding at presentation assist the survival of information across successive views. Such verbal encod- ing strategies might produce a differential pattern of results for detection and identification . Verbal encoding should enhance the identificatio n of changes that can be readily labelled or described, but not of changes less straightforward to describe such as the location changes made in Experiments 1 and 2. The
292 MONDY AND COLTHEART
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results showed a similar pattern for detection and identification , suggesting that verbal encoding strategies were not consistently used by subjects across trials. The role of verbal encoding in the detection and identificatio n of changes may be established through direct manipulation of its use.
The results also supported Agostinelli et al.’s (1986) proposals about the dis- tinction between stimuli that act as the subject and referent in a comparison of similarity. As noted previously, the processes assumed to apply in comparisons of simple schematic stimuli appear to generaliz e to comparisons of the more complex stimuli seen in natural scenes.
These processes appear to differ when scenes contain more than one instance of an object. The results of Experiment 2, with a larger set of factoriall y manipulated stimuli, did not demonstrate a generally lower level of performance with scenes having more than one instance of an object as sug- gested by the results of Experiment 1. However, the identificatio n advantage conveyed by an object deletion is clearly not found when an identical object remains in the changed scene.
REFERENCES
Agostinelli, G., Sherman, S.J., Fazio, R.H., & Hearst, E.S. (1986). Detecting and identifying change: Additions versus deletions. Journal of Experimental Psychology: Human Perception and Performance, 12(4), 445–454.
Ballard, D.H., Hayhoe, M.M., & Pelz, J.B. (1995). Memory representations in natural tasks. Journal of Cognitive Neuroscience, 7, 66–88.
Biederman, I., Mezzanotte, R.J., & Rabinowitz, J. (1982). Scene perception: Detecting and judging objects undergoing relational violations. Cognitive Psychology, 14, 143–177.
Blackmore, S.J., Brelstaff, G., Nelson, K., & Troscianko, T. (1995). Is the richness of our visual world an illusion? Transsaccadic memory for complex scenes. Perception, 24, 1075–1081.
Clark, H.H. (1973). The language-as-fixed-effect fallacy: A critique of language statistics in psychological research. Journal of Verbal Learning and Verbal Behaviour, 12, 335–359.
Corel Corporation. (1994). Corel Photo-Paint 5.0 [Computer program]. Ottawa, Ontario, Can- ada: Author.
Grimes, J. (1996). On the failure to detect changes in scenes across saccades. In K. Akins (Ed.), Perception (pp. 89–110). New York: Oxford University Press.
Jahnke, J.C. (1969). The Ranschburg effect. Psychological Review, 76(6), 592–605. Johnston, W.A., & Hawley, K.J. (1994). Perceptual inhibition of expected inputs: The key that
opens closed minds. Psychonomic Bulletin and Review, 1(1), 56–72. Kanwisher, N. (1987). Repetition blindness: Type recognition without token individuation.
Cognition, 27, 117–143. Levin, D.T., & Simons, D.J. (1997). Failure to detect changes to attended objects in motion pic-
tures. Psychonomic Bulletin and Review, 4(4), 501–506. McConkie, G.W., & Currie, C.B. (1996). Visual stability across saccades while viewing com-
plex pictures. Journal of Experimental Psychology: Human Perception and Performance, 22 (3), 563–581.
Microsoft Corporation. (1995). Microsoft Powerpoint 4.0 [Computer program]. Redmond, WA: Author.
DETECTION AND IDENTIFICATION OF CHANGE 293
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Miranda, N., Jackson, L.S., Bentley, D.M., Gash, G.H., & Nallan, G.B. (1992). Children dis- cover addition more easily and faster than deletion. Psychological Record, 42, 117–129.
Nallan, G.B., Bentley, D.M., Carr, J.F., Lyons, K., Moore, D.S., & Underhill, T. (1994). Adult humans perform better on addition than deletion problems. Psychological Record, 44, 489–499.
O’Regan, J.K., Rensink, R.A., & Clark, J.J. (1996). “Mud splashes” render picture changes invisible. Investigative Opthalmology and Visual Science, 37(3), S213.
Pezdek, K. (1987). Memory for pictures: A life-span study of the role of visual detail. Child Development, 58, 807–815.
Pezdek, K., & Chen, H.C. (1982). Developmental differences in the role of detail in picture rec- ognition memory. Journal of Experimental Child Psychology, 33, 207–215.
Pezdek, K., Maki, R., Valencia-Laver, D., Whetstone, T., Stoeckert, J., & Dougherty, T. (1988). Picture memory: recognizing added and deleted details. Journal of Experimental Psychology: Learning, Memory and Cognition, 14 (3), 468–476.
Rensink, R.A., O’Regan, J.K., & Clark, J.J. (1995). Global transients disrupt visual perception of changes in scenes. Cambridge Basic Research Technical Report, 95–6, 1–6.
Simons, D.J. (1996). In sight, out of mind: When object representations fail. Psychological Science, 7, 301–305.
Simons, D.J., & Levin, D.T. (1997). Change blindness. Trends in Cognitive Sciences, 1 (7), 261–267.
Tversky, A. (1977). Features of similarity. Psychological Review, 84, 327–352.
APPENDIX
Experiment 1 Stimuli
Unchanged Scenes
Scene Army helicopter winching two people from the ground. Vertical (upward) view of skyscraper. A country road. A bear. Internal view of an Asian temple. A series of Egyptian statues. A scuba diver feeding fish. Several workmen on a construction site. A lake with children playing in the foreground. Portrait shot of two African women. Pool and buildings in a Spanish setting. A herd of buffalo. A religious painting. Pumpkins by a verandah. Yaks in a mountain scene. A city skyline by night.
294 MONDY AND COLTHEART
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Filler Changed Scenes
Scene Change A church with a bell-tower. Part of building appears or disappears. A public building. Windows appear or disappear. A country scene. A horse appears or disappears. A woman seated at a desk. Writing on a postcard appears or disappears. Portrait shot of two women. An earring on one woman appears or disappears. A close-up of notes and coins on a desk. Coins appear or disappear. Two horses in a field. A fence appears or disappears. A family trimming a Christmas tree. A chair disappears. A water polo match. The goalie’s hat changes colour. A cement mixer delivering cement. The cement mixer changes colour. A vintage plane. Markings on the plane change colour. A woman sitting by a swimming pool. Her bathing costume changes colour. A lighthouse. A window moves position. A Cavalier. His drooping moustache inverts. South American dancers. A dancer’s arm moves. A stairwell from above. A chair at the bottom of the stairs changes
position.
Critical Changed Scenes
Scene Change Object (each was subject to all four changes)
A young woman standing in a doorway. The bow on her dress. A woman washing clothes in a river. A large barrel. A house from the street. The chimney. A Roman garden with columns and statues. A statue. A helicopter taking off. An emblem on the side of the helicopter. An orang-utan. Its teeth. A toy snowman. The broom it is holding. A city skyline. A large dome. A portrait shot of an eagle. Its tongue. A mosque. A central door. A streetcar. A man standing on the streetcar. A poker hand and chips. A poker chip. An African woman pouring grain. Her headdress. A cowboy and his horse. The horse’s saddle. A man holding an oar in a camping scene. The oar. A vintage car in a courtyard. A headlamp.
Experiment 2
Critical Changed Scenes
Scene Change objects that were part of a larger object A young woman standing in a doorway. The bow on her dress. A house from the street. The chimney. A city skyline. The large dome of a building. The steps and doorway to a house. A doorknob. The front of a vintage car. A headlight.
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A jet in mid-flight. A fuel pod on its wing. A country village. The roof gables of a house. A portrait shot of a woman. Her earring.
Scene Change objects that were whole objects A collection of horse grooming equipment. A large comb. Gambling paraphernalia. A die. A drummer on a boat. His drum. A city street. A flag. A collection of assorted pills. A pill. A Roman garden. A statue. A restaurant table. A glass of wine. City traffic. A bus.
296 MONDY AND COLTHEART
psychology/Ilma article 2.pdf
Singer et al. - Neuronal assemblies
63 Spams, 0.. Tononi, G and Edelman. G.M. (1991) Modeling perceptual
grouping and figure-ground segregation by means of active reentrant connections Pm. Natl. Acad. SC;. U. 5. A. 88. 129-133
64 Tononi, G., Sporns, 0. and Edelman, G.M. (1992) Reentry and the
problem of integrating multiple cortical areas-simulation of dynamic integration in the visual system Cereb. Cortex 2, 310-335
65 Leonards. U., Smger, W. and Fable, M. (1996) The Influence of
temporal phase differences on texture segmentation Vision Res. 36,
2689-2697
66 Leonards. U. and Singer, W. (1997) Selective temporal interactions
between processing streams with differential sensitivity for colour and
luminance contrast Vision Res. 37, 1129-l 140
67 Leonards, U. and Singer, W. Two segmentation mechanisms with differential sensitivity for colour and luminance contrast Vmon Res. (I”
press)
68 Kiper, D.C., Gegenfurtner, K.R. and Movshon, J.A. (1996) Cortical oscillatory responses do not affect visual segment&on Vision Res. 36,
539-544
69 Frewald, W.A.. Kreiter, A.K. and Singer, W. (1997) in Gattingen NeumbkhgyReport 1997(Elmer. N. and W%sle, H., eds), p 550, Thieme
Change blindness Daniel J. Simons and Daniel T. Levin
Although at any instant we experience a rich, detailed visual would, we de nti use such visual details to form a stable representation across views. Over the past five ye-
researchers have focused increasingly on ‘change blindness’ (the inability to de$ect
changes to an object or scene) as a means to examine the nature of our representations, Experiments using a diverse range of methods and displays have produced strikingiy
similar results: unless a change to a visual scene produces a localizable change or
transient at a specific position on the retina, generally, people will not detect it. We
review theory and research motivating work on change blindness and discuss recent
evidence that people are blind to changes occurring in photographs, in motion
pictures and even in real-world interactions. These findings suggest that relatively
little visual information is preserved from one view to the next, and question a
fundamental assumption that has underlain perception research for centuries: namely,
that we need to store a detailed visual representation in the mind/brain from one view
to the next.
s incc antiquity, scholars have assumed the need for pre- cise, veridical representations of our visual world’. Modern
researchers recognize that the two-dimensional retinal image cannot fully and unambiguously represent a three-
dimensional world, and since Descartes, they have posited
adjustments to the retinal image to compensate for distortions and ambiguities. In order to form an accurate, stable repre-
sentation, we must somehow extract the invariant structure
of the world from our ever-changing sensory experience. For example, as we view scenes in the real world, we move our
eyes (saccade) three to four times each second. Across fix.ations,
objects in the world are projected onto different parts of the retina. Somehow, we integrate information across these fix-
ations to achieve a stable representation: we must recognize
that two consecutive views are, in fact, of the same scene even when the viewpoint or viewing angle differs. Recently, research
on how we integrate visual information across fixations has
spawned a new series of studies focusing on our ability to detect changes from one view of a scene to the next. These
studies have produced a set of results that, consistent with
earlier evidence for memory distorrions, suggest a high degree of ‘change blindness’; observers do not appear to
retain many visual details from one view to the next. These
rcccnt findings and their implications for how WC rcprcscnt
our visual world are the primary focus of this review.
Evidence for change blindness
Although change detection has only recently become a topic of intense inquiry, research spanning many areas of cogni-
tive psychology has hinted at current findings. At times,
research on visual integration of information across eye movements has revealed striking examples of our inability
to detect changes (see Box 1). Research on recognition
memory for large numbers of photographs also suggested the possibility of change blindness. The primary purpose of
such studies was to demonstrate an impressive capacity to
remember photographs from a single presentation, but they also revealed a lack ofspecificity in representations (see Box 2).
Perhaps the most intriguing precursor to contemporary studies of change blindness comes from the informal observations
of film rrrakers and editors (see Box 3; several recent studies are described in the text).
Over the past ten years, a number of studies have begun
to address our inability to detect changes to objects and scenes from one view to the next (see Box 4). Some experi-
ments changed images during saccades. Others made changes
Copyright 8 1997, Elssvier Science Ltd. All rights reserved. 1364.6613/97/$17.00 PII: 51364.6613(97)01080-Z
Trends in Cognitave Sciences - Vol. 1. No. 7. October 1997
Simons and Levin - Change blindness
During the 197Os, evidence for visual masking and for the in-
tegration of visual information at a single retinal location’,b,
together with the general acceptance of the construct of iconic
memory (a short-term sensory memory rhat retains a detailed
picture-like representation of a scene)‘, inspired a model
for achieving a continuous experience”. This model suggested
that visual images from consecutive views are combined in a
visual buffer, much as two overhead transparencies can be
superimposed.
Although this model seems plausible, it cannot account for
continuity under natural viewing conditions. Somehow, visual
integration in the real world must accommodate changes m our
eye, head and body positions. In order for the visually integra-
tive buffer model to work, stimuli presented on two different
fixations or at two different retinal locations musr be inregrated
visually. That is, our visual system must determine that an ob-
ject is the same even when it srimulates different areas of rhe
retina on consecutive fixarions. In one test of this hypothesis,
subjects fixated a point in the center of a display and a 12-dot
pattern was presented briefly to parafoveal vision. Shortly there-
after, subjects moved their eyes to the parafoveal location and a
second 12-dot partern was presented. When the two patterns
were combined, one dot was missing, and subjects were asked to
determine the location of the missing dot. Although initial
studies supported the notion of a visually integrative buffef, later
studies controlling for methodological and display artifacts have
failed co replicate the inirial findir@ (for recent reviews, see Refs
I and m). Therefore, rhis research fails to support the hypothesis
that we form an accurafe representation by storing and inte-
grating precise visual information from one fixation co the next.
Additional evidence for rhe absence of integrated visual rep-
resentarion across eye movemems comes from rhe study of
preview effects in reading. One particularly dramatic example
comes from a task in which observers read lines of text chat al-
ternated case with each letter (e.g. AlTtRnAtEd Case)“. During
some saccades, every letter in the sentence changed case, so that
the visual form of every word was different. Surprisingly, when
rhe changes occurred during an eye movement, subjects almost
never noticed. Thar is, subjects not only failed m integrate the
visual form of the letters from one instant to the next, they
could not even tell rhat the visul form was changing.
Apparenrly, the information integrated across fixations during
reading is not contingent on the precise visual form of the word.
More recently, studies of reading have inspired a series of
studies of integration of pictorial information across eye move-
ments. These studies have focused on rhe benefits of a
parafoveal preview on processing during a subsequent fix-
ation”,“+q. One recent study showed fhaf when complementary
sets of conmurs from an object were shown before and after
an eye movement, in general, observers were unable to detect
the change and the contour change had no effect on naming
latencies”. The visual form was not sufficiently represented m
allow detection of rhe change.
In a sense, studies of visual integration and studies of change
detection address the same issues using complementary method-
ologies. Studies of visual integration focus on the ability co com-
bine two distinct images, essentially adding their contents. Studies
of change detection focus on the ability to subtracr one image
from another, thereby finding rhe difference. Both approaches
allow an exploration of the specificity of scene representations.
References
a Di Lollo, V. (1980) Temporal integration in visual memory 1. Exp.
Psycho/. Ge”. 109, 75-97
b Kahneman. D. (1968) Method, findings, and theory in studier of
visual masking Psycho/. Bull. 70, 404425
E Neisser, U. (1967) Cognitive psychology, Appleton-Century-Crofts
d McConkie, G.W. and Rayner, K. (1976) identifying the span of the
effective stimulus in reading: Literature review and theories of
reading, in Theoretical Models and Processes of Reading (2nd edn)
(Singer, H. and Ruddell. R.B.. eds). pp. 137-162, International
Reading Association
e Jonides. J., Irwin, D.E. and Yantis, 5. (1982) Integrating visual
information from successive fixations Science, 215, ‘192-194
f Bridgeman. 8. and Mayer, M. (1983) Failure to integrate visual
information from successive fixations Bull. Psychwomic Sot. 21.
285-286
9 Irwin, D.E.. Brown, J.S. and Sun, J-5. (1988) Visual masking and
visual integration across saccadic eye movements :. Exp. Psycho/.
Gen. 117. 27E-287
h Irwin, D.E., Yantis, 5. and Jonides, J. (1983) Evidenu! against visual
integration across saccadic eye movements Percept. Psychophysiol.
34,49-57
i Jonides, J., Irwin, D.E. and Yantis, 5. (1983) Failure to integrate
information from successive fixations Science 222, 188
j Rayner, K. and Pollatsek, A. (1983) Is visual informat.ion integrated
across raccades? Percept. Psychophysiol. 34, 39-48
k Sun, J-5. and Irwin, D.E. (1987) Retinal masking during pursuit eye
movements: Implications for spatiotopic visual persistence J. Exp.
Psycho/. Hum. Percept. Perform. 13, 140-145
I Irwin, D.E. (1991) Information integration across saccadic eye
movements Cognit. Psycho/. 23,421X456
m Pollatsek, A. and Rayner, K. (1992) What is integrated across
fixations? in Eye Movements and Visual Cognition: Scene Perception
and Reading (Rayner, K.. ed.). pp. 166-191, Springer-Verlag
n McConkie, G.W. and Zola, D. (1979) Is visuial mformation
integrated across successive fixations in reading? Percept.
Psychophysiol. 25. 221-224
o Henderson, J.M. (1997) Transsaccadic memory and integration
during real-world object perception Psycho/. Sci. 8, 51-55
p Pollatsek, A., Rayner, K. and Collins, W.E. (1984) Integrating
pictorial information across eye movements J. Exp. Psycho/. Gen.
113,426-442
q Pollatsek, A., Rayner, K. and Henderson. J.M. (19901 Role of spatial
location in integration of pictorial information scross saccades
1. Exp. Psycho/. Hum. Percept. Perform. 16, 199-21CI
during blinks or during a blank interval between two pic- Saccade-contingent changes
tures. Still others made changes to scenes while observers Imagine viewing a set of photographs for an upcoming
viewed a motion picture cut or a real-world occlusion event. recognition test. As you study the photogzaphs, you shift
What is striking about this diversity of approaches is the your attention among the objects in the image and you scan
similarity of the results. In all of these experiments, ob- the image with your eyes. Periodically, while your eyes are
servers fail to notice dramatic changes to displays. We will moving rapidly from one object to the next, something in
now turn to evidence for and mechanisms underlying change the scene is changed. The experimenters mention that the
blindness across saccades. scenes may change at times and that you :jhould let them
Trends in Cognitive Sciences - Vol. 1, NO. 7. October 1997
know if you see something change. Sounds easy, right? You
are studying the photographs intently for a test, so you should have a fairly complete representation.
Surprisingly, observers failed to notice when rwo men
in a photograph exchanged different colored hats and only
50% noticed when two people exchanged head2. In all,
subjects missed nearly 70% of the changes that occurred
during an eye movement. Subsequent studies3,4 have con-
firmed the basic pattern described by Grimes. During an
eye movement, we apparently lose, or at least lose access to,
many of the visual details of the previous view. But is
change blindness limited to cases in which information
must be integrated across eye movements? These dramatic
findings, accompanied by theoretical predictions of sparse
visual representationss-‘, spurred a flurry of investigations
into the mechanisms underlying change blindness,
Change blindness across simulated snccades One aspect of eye movements that might account for change
blindness is the existence of motion transients across the retina.
In a sense, the target change cannot be identified because the
eye is processing change signals from every location. IF global
transients effectively mask the ability to localize an i.ndivid-
ual transient or change, then any display that creates global
transients should make change detection difficult. In order
to examine this possibility, several laboratories indepen-
dently developed a technique designed to mimic eye move-
ments without changing the fixation locations3 (see Fig. 1).
Experiments using the flicker paradigm found that al-
most none of the changes were detected during the first cycle
of alternation, and many changes were not detected even
afrer nearly one minute ofalternationy. When the blankscreen
was removed, eliminating the disruption caused by the
global transient, the changes were detected easilyy, ‘. The
change blindness caused by a flashed blank screen suggests the possibility that other forms ofglobal transient should be
equally successful in hiding changes. In fact, another recent
study has demonstrated comparable results when changes
are made contingent on blinks”.
All of these findings illustrate the absence of a precise vis- ual representation that survives global transients, yet they all
suffer from one potential criticism. In all of these experiments,
the global transient effectively covers the location of the
change. Perhaps the blank screen, eye movement or blink
actually serves as a mask, interrupting processing at that lo-
cation. Another recent series ofstudies eliminates the masking
explanation using the same alternating images used in the
flicker studies. Rather than interspersing a blank screen, ex-
perimenters flashed a set of dot patterns at arbitrary positions
on the image simultaneously with the image change’*. These
dots created several additional local transients, giving the
appearance of a mud splash hitting the windscreen of a car.
However, they did not mask the image change. Even so, these additional local transients had an effect similar to an eye
movement or a flashed blank screen: observers could not
detect changes immediately, even though the chang,es pro-
duced local retinal transients. Although the degree of change
blindness was somewhat attenuated relative to performance
in the flicker paradigm (R.A. Rensink, pers. commun.),
change detection still required substantial time and effort.
Simon5 and Levin - Change blindness
In typical studies of scene memory, observers viewed hun- dreds and sometimes thousands of photographs of natural scenes. Later, they tried to identify which photographs they had studied and which they had never viewed beforez.b.C,d. Although the larger conclusion of these studies was that ob- servers can recognize previously viewed photographs at sur- prisingly high rates (sometimes exceeding 95% recognition after extended delays), several studies noted that memory for the images was not tied to the precise visual form of the image’,‘. When previously viewed photographs were mirror- reversed during a test, observers did not detect the change and reported them as previously viewed’. These findings suggest not only that we fail to detect changes to the exact visual form of a scene but, also, that we can extract the gist or meaning of a scene and use it for recognition”.
References
a Nickerson, R.S. (1965) Short-term memory for complex
meaningful visual configurations: A demonstration of capacity
Can. J. Psycho/. 19, 155-160
b Shepard, R.N. (1967) Recognition memory for words,
sentences. and pictures J. Verb. Learn. Verb. Behav. 6, 156-163
c Standing, L., Conezio, 1. and Haber, R.N. (1970) Perception and
memory for pictures: Single-trial learning of 2500 visual stimuli
Psychonomic SC;. 19. 73-74
d Standing, L. (1973) Learning 10,000 pictures. 9. J. Exp. fsychol.
25. 207-222
B Pedzek, K. et al. (1988) Picture memory: Recognizing added
and deleted details J. Exp. Psycho/. Learn. Mem. Cognit. 14.
468-476
.( : :. ,.
,;
:
The role of attention and expectations
The relatively long detection latencies in these studies of
change blindness suggest that change detection is an active
searching process in which individual objects are encoded
and compared sequentially across views. Although the data
do not speak directly to the nature of the search for changes,
one particular result reinforces this possibility. Changes to
objects in the ‘.center of interest’ of a scene (according to in-
dependent ratings) are detected more readily, even when the physical magnitude of the change is comparable to that of a
non-central change”,rO. This finding suggests that attention
is focused on central objects either more rapidly or more
often, thereby allowing faster change detection. The notion
of a center of interest has important implications for ho&
we encode our environment. Given the results of the mud
splash and flicker experiments, we know that changes will
not be encoded automatically and that some effort is needed
to detect changes even with a localized transient. Apparently.
the center of interest benefit derives not from the automatic representation of a precise visual image but from the ab-
straction of a scene’s contents.
If abstraction plays a central role in our representation
of scenes from one view to the next, then broad expectations
about a scene may influence how we encode objects in that
scene and, consequently, how we represent those objects. Interestingly, some of the early work on scene context and
expectations found similar change blindness and center of
interest effects’3,‘4. For example, in one experiment, observers
Trends in Cognitive Sciences - Vol. 1, No. 7. October 1997
Simonr and Levin - Change blindness
Box 3. Insights from film makers
In the movie Ace Ventura: When Nature Calis, the pieces on a chess board disappear completely from one shot to the next. In
Goodfeplkzs, a child is playing with blocks that appear and disap- pear across shots. One inevitable consequence of film produc-
tion is the need to shoot scenes out of order, and often to shoot
components of the same scene at different times. As a result, un-
intentionally, many details within .a scene may change from one
view to the next. Although film makers go to considerable effort
to eliminate such errors, almost every movie - in fact, almost
every cut - has some continuity mistake. Yet, most of the time,
people are blind to these changes. (Film makers are. of course,
justified in trying to ehminare glaring errors given the potential
costs of some audience members noticing the change. If just
one viewer notices such a change, the popular media and the In-
ternet community will publicize the change and inspire people
to look for the editing mistake rather than focusing on the movie.)
Film makers have long had the intuition that changes to the
visual details of a scene across cuts are not detected by audiences,
particularly when editing allows for smooth transitions”. For
example, the film maker Lev Kuleshovh notes that:
‘convincing montage makes the audience over-
look...minor defects (for example when the actor’s
costume changes between shots), though I repeat
that this is only possible if the scene is edited cor-
rectly (in cse of bad montage the blunder will
leap to the eye).’ Dmytvk” notes that change
blindness is evident when mistakes occur: ‘far from
the viewer’s center of interest. If he is watching the
actor’s eyes, a mismatch of an arm or hand will be
ignored nine times out of ten.’ Such intuitions
underlie Hochberg’s more recent speculations
about the ‘sketchiness’ of visual memoq and
clearly predict the center of interest effects de-
scribed in the text.
The craft of film editing constitutes a rich body
of knowledge about vision. Film makers must do
explicitly what our visual rystem does utomati-
ally: they must combine a series of p;trrial views
(individual shots) into a coherent whole (a contin-
uous scene) without audiences noticing the trans-
itions. Some editors even suggest ways to cause
audiences to move their eyes or blink, thereby allowing a cut to
go unnoticed”. This process of constructing a continuous visual
scene has taught film makers that the visual details are not cen-
tral to our understanding of a scene, but it has also given them
intuitions about what is central. For example, film makers track
the gaze direction of actors in each shot and are c.areful not to
violate the relative spatial locations of gaze targets. Ongoing
empirical studies of the importance ofcues such as gaze direction
and motion in motion pictures may provide a better understand-
ing of how we perceive the layout of scenes in the I-eal world.
References
a Dmytryk, E (1984) On Film Editing: An introduction to the Art of
Film Construction, Focal Press
b Kuleshov, L. (1987) Selected Works: Fifty Years in F;l,ns (Agrachev,
D. and Elelenkaya, N., translators). Raduga Publisher;
c Hochberg, I. (1986) Representation of motion and !,pace in video
and cmematic displays, in Handbook of Perception and Human
Performance (Vol. 1) @off, K.R., Kaufman, L.K. and Thomas, J.P..
eds). pp. 22.1-22.64, John Wiley and Sons
Fig. Person change in a motion picture. This figure depict! four frames
from a motion picture in which one actor is replaced by a different actor dur- Ing a change in camera angle (B and C). Even though the actor was clearly the
central object of the scene. many observers failed to detect this :hange.
viewed scenes that included both consistent and inconsist- likely to notice changes to the schema-inconsistent objects
ent objects in preparation for an upcoming recognition than the schema-consistent ones (also see Ref. IS). Unex-
task’“. During the testing phase, observers were asked to petted objects are more likely to garner attentional resources,
discriminate previously viewed images from similar images and attended objects are more likely to be retained from one
in which an object had been changed. Observers were more view to the next. More recently, superior recognition of
Box 4. What is in a view The word ‘view’ has a number of distinct meanings in perception research. A view can refer to a single fixation, a Gngle viewing
position or angle, or even a photograph of a scene. Here we take a view to be an unchanging image, essentially a snapshot of a scene.
For studies of visual integration across eye movements (see Box l), views are equivalent to fixations; observers fixate .I single image
and after they move their eyes, the scene has been changed, producing a different view. In studies of change detection across simu-
lated saccades, each time the image changes observers experience a different view. In motion pictures, each change in camera angle
produces a new view of the scene even though the content of the scene itself may be unchanged. Across a cut. a view change occurs
between the final frame of the first shot and the initial frame of the second shot. Using this definition, all of the work we discuss in-
volves changes across views, even when the changes occur across long delay intervals.
Trends in Cognitive Sciences - Vol. 1, No. 7. October 1997
Simon5 and Leun - Change blindness
inconsistent objects has been shown in recognition ofobjects
from real rooms16 (but see Ref. 13 for evidence that schema-
consistent objects are better retained). Friedman anticipated
many current claims of change blindness when she noted
that for expected objects: ‘local visual details of objects., .are
thus not generally encoded”*. She also made the prediction
that any change not altering the abstract description of a
scene substantially is unlikely to be detected.
If scene schemas help determine which changes will be
noticed, then models proposing precise representations of
the visual details of our environment may still prevail.
Perhaps change blindness only applies to peripheral and un-
attended objects. Even if the visual details of peripheral ob-
jects are not represented precisely, the details of centrally at- tended objects may be. Several laboratories have tesred this
possibility.
Changes to attended objects
One test of the detectability of changes to attended objects
comes from a task in which participants duplicate a pattern
of colored blocks” (see Fig. 2). Participants were observing
the display carefully, in order to perform an action. so the
model must be considered the center of interest of the scene.
Yet, they failed to notice a change to the model pattern
when it occurred during an eye movement.
In another series of studies18, observers viewed an array
of five objects on a computer monitor. After two seconds,
the array was replaced with a blank screen, followed shortly by another array of five objects. The second array was either
identical to the first or was different in one of three ways:
(a) one of the objects was moved to a previously empty
location, (b) one object was replaced by an object that was not in the original array, or (c) two objects in the original
array switched places. Observers were asked to determine
whether or not any change had occurred (see Refs 19 and 20
for earlier work using a similar method). As in the flicker
paradigm, observers missed changes when an object was
replaced with a different object or when two objects
switched places. As in the block-copying task, observers
clearly focused attention on the objects in each display. The
primary goal of the task was change detection, so they knew
that they should encode the objects. In recent pilot studies
using the same paradigm coupled with eye tracking
(D.J. Simons and M. Spivey-Knowlton, unpublished), we
found that, typically, observers look at all of the objects in
the display. Thus, change blindness does not appear to re-
sult from a failure to focus attention on the target object
during the trial.
Although these two studies using different methods
converge on the conclusion that even attended objects may not be encoded sufficiently to allow change detection, both
involved displays in which the observer’s attention shifts
from object to object during encoding. Perhaps our visual
system can only tolerate one central object at a time.
Successful change detection may only occur when the target
object is the central object immediately before and after the
change. To examine this possibility, we used motion pic-
tures to change an object that remained central throughout
the scene” (see Box 3). In these films, a single character
performed a simple action such as rising from a chair and 1
Fig. 1 The flicker technique. An original image and a modifiecl image of a natural scene are presented in rapid alternation with a blank gray screen interoosed between them, giv-
ing the display a flickering appearance (this method is often call,ed the ‘flicker paradigm’).
The cycle of alternation repeats until observers report the charlge, and response latency is used as a dependent measure of change blindness. If change blindness is caused by mask-
ing local transients with global ones, then the flashed blank screen should decrease change detection. This figure was modeled on a figure appearing in a recent paper by Rensink
et a1.9.
Model
n mT’ Stockpile
n n n
4. n 3
.I Workspace
Fig. 2 Change blindness in a block copying task. This figure is a replication of the sort
of display used by Ballard et al.“. In this task, observers use a mouse to select and move
colored blocks from the ‘stockpile’ to reproduce the ‘model’ in th,e ‘workspace’. Participants often produce a revealing sequence of eye-movements during this task: (1) after examining
the model, they saccade to the stockpile to select an appropriately colored block, (2) after selecting a block, sometimes they saccade back to the model, presumably to double check
the location or color of the block, and (3) they saccade to the workspace and place the
selected block. During the second saccade. sometimes the experimenters changed the color of one of the model blocks. Even though the model was a center of interest in the scene,
observers noticed the change only rarely”.
Trends in Cognitive Sciences - Vol. 1, No. 7. October 199;’
Outstanding questions
l Evidence reviewed in the text suggests that scene-inconsistent objects are coded more thoroughly than scene-consistent objects14,16J9. How do we form expectations for a scene and to what extent do they influence our coding of objects and our ability to detect changes? If expectations influence what we attend to in a scene, then an instructional manipulation might lead to a radical difference in change blindness. Specifically, we would predict that a single change occurring in an ambiguous scene might be noticed for one interpretation but not another. More specifically, would changes only be detected when they violate expectations about a scene?
l When observers are not searching actively for a change, in general, they do not detect changes, even to the central object in a scene. When our behavioral goal is not change detection, we tend to encode the gist of a scene without explicitly coding the details that would allow change detection. In such cases, we are attending to objects and scenes, but we do not appear to encode the details necessary for change detection. What then does it mean to ‘attend to’ an object? Are there different kinds of attention that might influence change detection? How does the attention that leads to successful change detection differ from the kind of attention that makes an object the center of interest?
l What sorts of changes are likely to be noticed and what differentiates those from unnoticed ones? We have some evidence that changes to spatial layout are detected more readily than changes to object properties’*, but a simple thought experiment shows that some property changes should be easy to notice. For example, if one of the actors in a video were replaced with a skunk, people would certainly notice the change. What aspect of this change would make it noticed more easily?
l Does change blindness indicate the absence of representations? Although this conclusion may be appealing, the possibility remains that more sensitive measures than change detection would reveal some underlying representation. Recent work on inattentional blindness shows that background objects in the visual field can influence judgments even if observers are unaware of their existence30. If so, what is the nature of these representations (for example, how precise and detailed are they) and in what ways do they influence our behavior? If such ‘implicit’ representations are precise and detailed, why do they not allow us to detect changes?
l How can we reconcile evidence for form-specific visual memory in priming studies3’,32 with change blindness?
answering a telephone or entering through a doorway and
sitting in a chair. During the action sequence, we cut from
one camera angle to another, and during that cut, the orig-
inal actor in the scene was replaced by a different person
who then completed the action. The changes in camera
angle followed conventional editing techniques by cutting
in the middle of the action”. Even though the character was
clearly the central object in the scene, 67% of observers
failed to detect the change from one actor to another.
Despite their change blindness, observers could describe the action sequence accurately and sometimes described
properties of one or both actors. The actors were clearly dis-
criminable; when given a set of films, half of which had
changes to the actor and half of which did not, observers who had been instructed to look for changes had Me
trouble detecting them (see Box 3).
Although these findings demonstrate that changes to
objects in the center of interest are nor necessarily noticed, they support the claim thar attention and abstract encoding
are necessary for change detection. When observers search
for and encode the features that individuate people, they
can detect the change. Yet, under natural viewing condi-
tions, they are unlikely to do so. Instead, they encode the
gist of the scene (in this case, the specific action and a few
characteristics of the actor) and ignore the vi:,ual details. As
long as the gist remains the same, change detection is un-
likely because observers have not expended the effort to en-
code more details. This encoding strategy makes sense given
the innumerable perceptual features in a natural scene
or event, but it also illustrates the degree to which we lack a
detailed representation of our world. Although these findings of change blind:less, taken to-
gether, support the conclusion that we lack a precise repre-
sentation of our visual world from one view to the next,
none of them focused on the representation of real objects
in our environment. All of them presented scenes and ob-
jects on computer monitors and television displays which
clearly lack many of the properties of real objects. One final
series of studies examined the possibility that computer dis-
plays and motion pictures do not reflect how we process ob-
jects in the real world. In these studies, we extended the per-
son change video studies” to the real world. Imagine that a
person approaches you and asks for directiors. Kindly, you oblige and begin describing the route. Whil’: you are talk-
ing, two people interrupt you rudely by carrying a door
right between you and rhe person you were talking to.
Surely you would notice if the person you were talking to
was rhen replaced by a completely different person. When
we actually conducted this study, only 509/o of observers
noriced the change (D.J. Simons and D.T. Levin, unpub-
lished). The two experimenters wore different clothing,
were different heights and builds, had different haircuts and
had noticeably different voices.
Interestingly, those who did norice the change were stu- dents of roughly the same age as the experimenters and those
who failed to notice it were older than the experimenters.
We theorized that this age difference may reflect a difference
in how people abstracted the gist of the scene. Older partici-
pants would be more likely to encode rhe event as ‘some scu-
dent asking directions’; younger participants would be more
likely to individuate the features of a person in their own
social group and, thereby, would be more likely co encode
those features chat would discriminate the two experi- menterF. To examine rhis possibility, we replicated the
door event with the same two experimenters dressed as con-
struction workers (again with different clothing) under the
assumption that these costumes would place the experi-
menters in a social group distinct from the students. Under
these conditions, fewer than half of the students noticed the
change. These studies demonstrate convincingly that pay- ing attention to an object by no means guzrantees change
detection. The central object in a scene and the focus of a
social interaction changed without observers noticing. As in
studies of recognition memory for objects In phorographs
and rooms’4.16, observers were unlikely co notice changes
that did nor violate the gist of the scene. In this case, as long
as the rough description of the scene was the same before
and after the change, observers did not notice.
Summary and fuuture directions Taken as a whole, these findings provide a striking picture
of our ability to perceive and represent scenes. Although the
ability to discriminate and recognize phorographs of scenes
@ . .
Trends in Cognitive Sciences - Vol. 1. No. 7. October 1997
Simons and Levln - Change bllndnesr
can be exceptionally good’“-‘*, memory for the properties
and features of objects in scenes is surprisingly transitory.
Findings from research on perception for action, change de-
tection, motion picture perception and real world inter-
actions all suggest that the visual details of object properties
are not retained automatically from one view to the next.
We fail to notice changes to scenes when they do not produce
a motion on our retina that attracts attention. Although
changes to central objects are more likely to be detected,
they are not detected automatically. Therefore, attention is
necessary, but not sufficient, for change detection.
Given failures of change detection, we must question
the assumption that we have a detailed representation of our
visual world. And, given our success in interacting and be-
having in our environment, we must ask whether such de-
tailed representations are even necessary. Although change
blindness might appear to contradict our phenomenal experi- ence of a stable, continuous world it may actually account
for this impression. During any fixation we have a rich vis-
ual experience. From that visual experience, we abstract the
meaning or gist of a scene. During the next visual fixation,
we again have a rich visual experience, and if the gist is the
same, our perceptual system assumes the details are the
same. Consider, for example, a busy city street. In this kind
of scene, a variety of property changes occur during th.e nor-
mal course of events. People are occluded by walking be-
hind barriers, cars move, revealing previously hidden ob-
jects on the sidewalk, and people may shift a bag to the
other arm or take out a handkerchief. All of these changes
are rapid and might occur during saccades or between suc-
cessive glances. A system that is too precise in tracking visual
details would, in the words of William James, present a
‘blooming, buzzing confusion’. In contrast, a system that
gives a rich perceptual experience at any instant, but only
integrates the gisr (and perhaps the layout and mov’ement direction) from one view to the next would give the irnpres-
sion of stability rather than chaos. This system -would
be successful at ignoring unreliable object property infor-
mation, focusing instead on the information that the per-
ceiver needs to know. Thus, change blindness supports the
phenomenal experience of continuity by not preserving too
much information from one view to the next.
. , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I. . . . . .
Acknowledgements
The author thanks John Henderson and Ron Rensink for their comments
and suggestions on a” earlier draft of this manuscript.
.,....,...........................,.........,............................................ . . . . . . . . . . .
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saccades, in Perception (Vancouver Studies in Cognitive !idence)
(Vol. 2) (Akins, K, ed.), pp. 89-110, Oxford University Press
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Beckman Institute, University of Illinois
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while viewing complex picturesI. Exp. Psycho/. Hum. Percept Perform.
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5 Dennett, D.C. (1991) Consciousness Explained, Little, Brown and
Company
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The world as an outside memory Can. J. Psycho/. 46, 461-488
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Information Theory in Psychology: Problems and Methods (Quastler,
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illusion? Transsaccadic memory for complex scenes Perception 24,
1075-1081
9 Rensmk, R.A., O’Rega”, J.K. and Clark, J.J. (1997) To see or not to see:
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10 Tarr, M.J. and Aginsky, V. (1996) From objects to scenes: Speculations
on similarities and differences. Paper presented at the Scene
Recognition Workshop, Max-Plank-lnstitut fiir Siologische Kybernetik,
Ttibingen, Germany.
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where you look and seeing where you don’t look Invest Ophthalmol.
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12 O’Regan, J.K., Rensink, R.A. and Clark, J.J. (1996) “Mud splashes”
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Trends in Cognitive Sciences - Vol. 1, No. 7, October 1997
psychology/Ilma article 3.pdf
Change blindness: past, present, and future Daniel J. Simons
1 and Ronald A. Rensink
2
1 Departments of Psychology and Computer Science, University of Illinois, 603 E. Daniel Street, #807, Champaign, IL 61820, USA
2 Department of Psychology, University of British Columbia, 2136 West Mall, Vancouver, BC V6T 1Z4, Canada
Change blindness is the striking failure to see large
changes that normally would be noticed easily. Over the
past decade this phenomenon has greatly contributed
to our understanding of attention, perception, and even
consciousness. The surprising extent of change blind-
ness explains its broad appeal, but its counterintuitive
nature has also engendered confusions about the kinds
of inferences that legitimately follow from it. Here we
discuss the legitimate and the erroneous inferences that
have been drawn, and offer a set of requirements to help
separate them. In doing so, we clarify the genuine con-
tributions of change blindness research to our under-
standing of visual perception and awareness, and
provide a glimpse of some ways in which change
blindness might shape future research.
Introduction
The term ‘change blindness’ refers to the surprising dif- ficulty observers have in noticing large changes to visual scenes [1,2]. Although failures to detect change have been studied for decades [3], recent work has brought change blindness out of the laboratory and into the realm of more typical perceptual experience. But although the often counterintuitive nature of change blindness has been the source of considerable insight into visual perception and awareness, it has also been the source of considerable confusion as to the inferences that can be legitimately drawn from it. Consequently, the results of these studies have sometimes been mischaracterized, leading to extreme and relatively unsupported claims, some of which have gained traction in the field. In rejecting these claims, some researchers have been tempted to summarily dismiss the entire field, essentially throwing out the baby with the bathwater.
The goal of this opinion article is to counter this potentially unfortunate trend by: (i) highlighting the new and important insights that have legitimately been obtained from recent work on change blindness; (ii) identifying common misconceptions about the kinds of inferences that can be drawn from it; (iii) delineating the constraints on such inferences so that future work will not fall prey to these misunderstandings; and (iv) describing some new
Corresponding authors: Simons, D.J. ([email protected]); Rensink, R.A. ([email protected]).
Available online 8 December 2004
www.sciencedirect.com 1364-6613/$ - see front matter Q 2004 Elsevier Ltd. All rights reserved
ways in which change blindness can provide a useful tool for the study of attention, awareness, and visual perception.
Insights obtained from change blindness
The recent surge of interest in change blindness followed decades of related work on the interplay between visual perception and memory [3]. For example, numerous previous studies showed that observers often fail to notice the displacement of a target dot or the change in shape of a line-drawn object if the change occurs during an eye movement (see [4] for an overview). This earlier work addressed many of the same theoretical issues revivified by more recent research, including limitations on memory capacity, links between attention and awareness, and the integration of information over time. However, an over- arching theoretical framework linking these issues was never developed.
Generality of effect
The shift to a more general view of change blindness was triggered – at least in part – by the discovery in 1991 that observers often failed to notice large changes to photo- graphs that were made during an eye movement [5]. For example, 50% percent of observers failed to notice when two cowboys sitting on a bench exchanged heads! These shocking results inspired others to examine whether similar failures could happen in other ways, and in the absence of eye movements.
In one of these new paradigms – the ‘flicker’ task [1] – an original and modified scene alternate repeatedly, separated by a brief blank display, until observers find the change. Observers eventually find most changes, but can take an astonishingly long time to do so, even for large changes. Similar results were found for changes made during eye blinks, ‘mudsplats’, and brief occlusions, as well as changes made gradually (see [3] for an overview). All these techniques (as well as those based on eye movements) involved a common element: they impaired localization of the motion signals that accompanied the change. This suggested that attention is needed for change perception, with change blindness resulting whenever the accompanying motion signals failed to draw attention [1]. Other studies discovered that these effects are even stronger when the changes are unexpected. For example, if an actor in a scene is changed during a shift in camera position, most observers do not notice, even if the actor is replaced by another person [6]. In fact, many observers fail to notice
Opinion TRENDS in Cognitive Sciences Vol.9 No.1 January 2005
. doi:10.1016/j.tics.2004.11.006
Opinion TRENDS in Cognitive Sciences Vol.9 No.1 January 2005 17
when a conversation partner is replaced by a different person in the middle of a real-life interaction [7,8].
The use of naturalistic stimuli in more recent work represented a significant departure from earlier research, one which helped bridge the gap between the simple stimuli usually found in the laboratory and the complex stimuli usually found in the real world. The counter- intuitive finding of substantial change blindness under more naturalistic conditions strongly supports the view that it is not an artifact produced by artificial disruptions; rather, it is a general failure to retain and/or compare information from moment to moment. Moreover, this counterintuitiveness itself is of scientific interest; most people firmly believe that they would notice such large changes [9,10]. The practical ramifications of this ‘change blindness blindness’ are significant; for example, the mistaken belief that unexpected events always draw attention might help account for ‘looked but didn’t see’ automobile accidents.
Relation to attention
Another important finding established by these newer studies is that attention is needed to see change. Changes to semantically central items are detected faster than changes elsewhere [1], even when the changes are of equal physical salience [11], suggesting that objects in a scene that preferentially receive attention are more likely to be encoded and compared. This finding inspired further insights into the nature of focused attention, the nature of visual short-term memory, and the relation between them. For example, although attention can be distributed to 4–5 items at a time [3], only a single change can be seen at any moment (‘change simultagnosia’) [12], indicating that the information from these items is pooled into a single collection point (or ‘nexus’). Moreover, properties of the same kind compete for binding into a single integrated object, but properties of different kinds do not, suggesting that they are represented by parallel systems [13].
Interestingly, the connection between attention and awareness is not symmetrical: although attention is necessary for conscious change perception, it might not be sufficient. Changes to attended objects frequently go unnoticed [14,15], particularly when the changes are unexpected. This suggests that object perception is highly dynamic – the properties consciously perceived at any moment are just those needed for the task at hand [15]. Such findings counter earlier claims that attention always binds features into a complete representation of an object [16–18].
Given the link between attention and awareness, change detection has also been used to measure the locus of attention, much as eye tracking can measure the locus of fixation. For example, Tse and colleagues asked subjects to search for a change in a large array, using successful detection to indicate the locus of attention [19]. Interestingly, detection was enhanced both at the location of a flashed cue and on the opposite side of fixation, indicating that attention is symmetrically distributed around the fixation point, something not previously suspected. This technique, in principle, could serve as an ‘attention tracker,’ providing a measure of covert attention
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independent of fixation. Moreover, it could potentially be used to assess not only what observers are attending to, but also what aspects of it (e.g. overall shape, color, particular parts).
Insights into other visual processes
These developments have in turn provided a novel way to explore perceptual organization and grouping processes. For example, studies using the flicker task suggest that items of similar color can be grouped into a single memory structure [12]. Change-detection failures also have been used to explore the role of scene context in guiding attention [20] and to provide an indication of foreground- background segmentation and re-segregation [21].
Given that attention is limited, our perception of dynamic events in a scene requires careful attention management [3]. Faster change detection implies earlier attention to the changed property, and an analysis of such ‘attention scanpaths’ can provide important insights into individual and group differences. For example, social drug users are more likely to detect changes to drug para- phernalia in photographs than are non-drug users [22] and American football experts are better able to spot meaningful changes to football scenes than are novices [23]. Change blindness can also help determine the mechanisms and strategies used by patients with various visual deficits [24,25].
Work on change blindness has also helped at an operational level, refining concepts which were not previously well articulated. For example, it forced a clarification of the distinction between motion perception, change perception, and difference detection, notions that often were conflated in earlier work: Motion perception is now more clearly understood as the detection of unorgan- ized flow at a location, change perception as the detection of an ongoing transformation of a structured object, and difference perception as an inferential comparison of the current stimulus with traces in long-term memories [3]. These distinctions can be applied broadly, for example in distinguishing between the contributions of motion and change in the perception of facial expression [26].
Change detection research has also developed ways to explore possible non-attentional (and perhaps non- conscious) contributions to visual perception. Such pro- cesses might register the presence of a change before conscious perception, either via the possible [27] operation of implicit processes [14,28–30] or via other mechanisms such as ‘mindsight’ – the ability of some observers to experience a ‘gut feeling’ as to the presence of a change before they visually identify it [31]. This ‘sensing’ of a change might constitute a new perceptual mechanism revealed through the use of change blindness (but see [32]). Although such non-attentional pathways are con- troversial, change blindness has inspired novel, testable hypotheses about the mechanisms of perception.
Limits to what can be inferred from change blindness
Unfortunately, these important advances have been clouded by the drawing of several overly strong con- clusions. For example, earlier work on visual integration inspired the claim that our visual representations are
Opinion TRENDS in Cognitive Sciences Vol.9 No.1 January 200518
sparse, incomplete, or absent altogether [33,34], and the striking blindness to large changes in scenes strengthened the appeal of this view. If true, this conclusion would require radical revisions of our way of thinking about perception, memory, and awareness [35].
However, the existence of change blindness does not on its own necessitate sparse representations – it could occur even with fairly detailed and complete visual represen- tations of a scene [36–38]. Despite regular mention of the fact that representations might exist in the face of change blindness [2,36], conclusions of absent representations have become increasingly prevalent [35], with conference sessions devoted to the idea (for example, at the 2004 Meeting of the Association for the Scientific Study of Consciousness). Many researchers who recognize the logical flaw have consequently been tempted to dismiss the entire line of research, thereby throwing out the good along with the bad.
In an attempt to counter these potentially unfortunate trends, we identify four ‘requirements of scope’, which delineate the possibilities that need to be ruled out before a blanket assertion of sparse (or absent) representations
C
…
C
…
(a)
(c)
Display sequence
Display sequence
Figure 1. The consequences of failing to meet the requirements of scope. Each panel
requirement of scope is not met. The sequence of displays viewed by the observers app
‘C’ indicates a comparison process and the arrows indicate what is compared. In (a),
compared with the post-change scene. When the comparison eventually occurs, the in
nothing about such short-lived representations. In (b), the representation is complete
blindness ensues. In (c), the representation is detailed but in a format that precludes succ
comparison process fails and the change is not detected. Note that in each of the four c
momentarily). Even if the representations are not complete and detailed, the logic unde
change blindness still apply.
www.sciencedirect.com
could be legitimately drawn from the existence of change blindness. The consequences of failing to meet these requirements of scope are illustrated by Figure 1.
Requirements of scope
(1) Evidence must eliminate the possibility that detailed and complete representations exist, but decay or are replaced before change perception occurs. Indeed, experiments on visual search and iconic memory indicate that detailed representations do exist, but are volatile, lasting only 0.5 s or until some new stimulus replaces them [39,40]. No extant change blindness study has ruled out this possibility. (2) Evidence must eliminate the possibility that rep- resentations of the pre-change stimulus exist, but are at locations or in pathways inaccessible to the mechanisms used for change perception. Considerable evidence exists for multiple visual pathways [41]; indeed, visuo- motor pathways apparently do contain information unavailable to conscious change detection [42,43]. Extant change blindness experiments have insuffici- ently addressed this possibility. (Interestingly, the
C
C
…
…
(b)
(d)
Display sequence
Display sequence
illustrates how information can be preserved in the face of change blindness if a
ears below a gray box indicating what is retained from the initial display over time.
the representation is initially complete, but fades or is disrupted before it can be
itial representation is gone, so change blindness ensues. Change blindness says
, but it does not enter the pathway used for the comparison process, so change
essful change detection. In (d), the representation is complete and detailed, but the
ases, the representation of the first display could be complete and detailed (at least
rlying the requirements of scope and the limitations they place on inferences from
Box 1. Perception versus inference
Failure to recognize the requirements of scope sometimes leads to
the erroneous conclusion that all visual representations are sparse
or absent. Yet, similar failures can also lead to illegitimate con-
clusions that overestimate the completeness of the representations
underlying conscious ‘here-and-now’ visual experience [37].
Observers can sometimes detect a change when they later
re-fixate a changed item, implying that some information about
the pre-change object was stored somewhere. But the inference of a
change at some point in the past does not imply that the observer
also perceived the change. Indeed, these processes might use
entirely different mechanisms and representations [3]. For example,
many observers fail to notice when a building in a photograph
gradually disappears over the course of 12 s. However, upon viewing
the initial state of the photograph again, they then realize that the
building is missing [47]. They did not have a visual experience of it
changing; rather, they realized that it was different, possibly on the
basis of long-term memory.
Although both mechanisms involve preserved information, it is
important not to conflate them; otherwise, there is a risk of
inappropriately ascribing the capacity of the long-term mechanisms
presumably used for inference to the shorter-term mechanisms used
for change perception, inflating estimates of the information they
contain. Of course, more complete and detailed ‘pixilated’ represen-
tations might be involved in change perception [37,38], but the
existence of these does not logically follow from existing work. This
inference would require establishing that only the short-term
mechanisms underlying change perception were being tested,
with no direct contributions from longer-term structures.
Box 2. Outstanding issues and questions
† Can observers detect a change even if they fail to perceive it con-
sciously? More precisely, does change perception require a conscious
comparison mechanism [27]? If not, are there alternative routes to
change detection [29,30]? Such alternative routes would suggest that
attention might not be necessary for change detection (or perhaps that
it is necessary only for conscious perception of change).
† How detailed are our visual representations? Earlier frameworks
posited that preserved representations were relatively sparse,
containing for example less than 10% of the information (in terms
of bits) in the incoming image [48]. However, the amount of
preserved information might be much higher [38]. New research
could address this issue by fully meeting the requirements of scope,
by clarifying what is meant by ‘detail’, and by using converging
measures from tasks and methods not based on change perception.
† Do people experience the presence of a change before they can
explicitly localize and identify it? The evidence for mindsight
suggests that it is an experiential state quite different from the
‘picture’ that usually accompanies the pick-up of visual information.
Does mindsight constitute evidence for a previously unknown
perceptual mechanism [31]? Or can it be accounted for by individual
differences in the criteria used to report a change [32]?
† To what extent and in what manner do long-term representations
(visual or otherwise) contribute to change-detection performance?
When long-term memory does contribute, are the mechanisms
responsible qualitatively different from when change detection
happens via immediate perception? Does the comparison of long-
term information differ from the immediate perception of change
[3]? Are the contents of the longer-terms stores ever transferred to
the shorter-term mechanisms?
Opinion TRENDS in Cognitive Sciences Vol.9 No.1 January 2005 19
presence of multiple pathways can lead to an over- estimate of the information available for change perception; see Box 1.) (3) Evidence must eliminate the possibility that such representations exist, but are in a format that cannot be used for change perception. In other words, evidence must show that whatever can be seen, can be seen to change. If this requirement is not met, conclusions must be limited to those representations that subserve the perception of change, rather than perception in general. Tests not involving comparison (e.g. infor- mation integration across saccades; see [34]) could potentially examine such representations. But change blindness can say nothing about the nature of rep- resentations that cannot be compared. (4) Evidence must eliminate the possibility that such representations exist in an appropriate format and pathway, but the comparison operation is not applied (even though it could be). For example, if the change- detection task is time-limited and the comparison mechanism slow, observers might not be able to compare the changed region in time [36,38,44]. And even with sufficient time, these mechanisms might not be engaged by tasks that do not compel their use [45]. Consequently, change blindness cannot rule out the existence of representations that were not accessed. In summary, the failure to detect change does not imply
the absence of a representation unless all the require- ments of scope are met. Given that no studies have done this, extant work on change blindness can say nothing about the representations that subserve the static aspects of vision – it can only reveal limits on the representations that subserve the conscious perception of dynamic change. In fact, mounting evidence suggests that some
www.sciencedirect.com
information is preserved even when observers fail to detect changes [37,38,44]. And theoretical frameworks based on change blindness studies have long asserted that at least some information concerning the static aspect of a scene must be maintained (over both short and long time scales) if scene perception is to operate effectively [40].
The future of change blindness research
Although there are limits to some of the conclusions that can be drawn from change blindness, considerable poten- tial remains. Change blindness has already contributed to our understanding of various mechanisms of visual perception, including those that are central to our con- scious experience of vision. It has extended the reach of empirical techniques beyond the traditional boundaries of cognition and perception research, providing a new way to explore individual differences, expertise, and even cultural differences [46]. And it may even provide new ways of studying aspects of individual experience that have traditionally been difficult to investigate (e.g. implicit perception; see also Box 2).
Change blindness has contributed to a resurgence of the study of scene perception, and in particular, of the dynamics that underlie it. More broadly, change detection and change perception can be considered special cases of event perception, and the concepts and techniques deve- loped in this literature could become useful tools for understanding the perception of dynamic events more generally. Such an approach holds promise for several reasons. First, studies of change blindness use a wide variety of stimuli, from controlled displays to real-world interactions. Second, models based on change blindness already address the nature of object representations,
Opinion TRENDS in Cognitive Sciences Vol.9 No.1 January 200520
allowing a natural extension to events. Third, change- blindness research inherently concerns scene perception over time, something that most models of object recog- nition do not. As such, there is potential to extend the concepts and techniques developed in this field of research to more complex events, thereby enabling the successful exploration of a world of interesting new phenomena.
References
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2 Simons, D.J. and Levin, D.T. (1997) Change blindness. Trends Cogn. Sci. 1, 261–267
3 Rensink, R.A. (2002) Change detection. Annu. Rev. Psychol. 53, 245–277
4 Bridgeman, B. et al. (1994) A theory of visual stability across saccadic eye movements. Behav. Brain Sci. 17, 247–292
5 Grimes, J. (1996) On the failure to detect changes in scenes across saccades. In Perception (Vancouver Studies in Cognitive Science) (Vol. 5) (Akins, K., ed.), pp. 89–110, Oxford University Press
6 Levin, D.T. and Simons, D.J. (1997) Failure to detect changes to attended objects in motion pictures. Psychon. Bull. Rev. 4, 501–506
7 Simons, D.J. and Levin, D.T. (1998) Failure to detect changes to people in a real-world interaction. Psychon. Bull. Rev. 5, 644–649
8 Levin, D.T. et al. (2002) Memory for centrally attended changing objects in an incidental real-world change detection paradigm. Br. J. Psychol. 93, 289–302
9 Levin, D.T. et al. False predictions about the detectability of unexpected visual changes: The role of beliefs about attention, memory, and the continuity of attended objects in causing change blindness blindness. Conscious. Cogn. (in press)
10 Levin, D.T. et al. (2000) Change blindness blindness: The metacogni- tive error of overestimating change-detection ability. Vis. Cogn. 7, 397–412
11 Kelley, T.A. et al. (2003) Effects of scene inversion on change detection of targets matched for visual salience. J. Vis. 3, 1–5
12 Rensink, R.A. (2002) Failure to see more than one change at a time. J. Vis. 2, 245a
13 Wheeler, M.E. and Treisman, A. (2002) Binding in short-term visual memory. J. Exp. Psychol. Gen. 131, 48–64
14 Williams, P. and Simons, D.J. (2000) Detecting changes in novel, complex three-dimensional objects. Vis. Cogn. 7, 297–322
15 Triesch, J. et al. (2003) What you see is what you need. J. Vis. 3, 86–94 16 Luck, S.J. and Vogel, E.K. (1997) The capacity of visual working
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attention. Cogn. Psychol. 12, 97–136 18 Kahneman, D. et al. (1992) The reviewing of object files: Object-
specific integration of information. Cogn. Psychol. 24, 175–219 19 Tse, P.U. et al. (2003) Attentional enhancement opposite a
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20 Jiang, Y. et al. (2004) Perceptual grouping in change detection. Percept. Psychophys. 66, 446–453
21 Landman, R. et al. (2004) The role of figure–ground segregation in change blindness. Psychon. Bull. Rev. 11, 254–261
22 Jones, B.T. et al. (2003) A flicker paradigm for inducing change blindness reveals alcohol and cannabis information processing biases in social users. Addiction 98, 235–244
23 Werner, S. and Thies, B. (2000) Is ‘change blindness’ attenuated by
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domain-specific expertise? An expert-novices comparison of change detection in football images. Vis. Cogn. 7, 163–174
24 Pisella, L. et al. (2004) Impaired working memory for location but not for colour or shape in visual negelct: A comparison of parietal and nonparietal lesions. Cortex 40, 379–390
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26 Ambadar, Z. et al. Deciphering the enigmatic face: The importance of facial dynamics in interpreting subtle facial expressions. Psychol. Sci. (in press)
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29 Thornton, I.M. and Fernandez-Duque, D. (2000) An implicit measure of undetected change. Spat. Vis. 14, 21–44
30 Fernandez-Duque, D. et al. (2003) Representation of change: Separate electrophysiological markers of attention, awareness, and implicit processing. J. Cogn. Neurosci. 15, 491–507
31 Rensink, R.A. (2004) Visual sensing without seeing. Psychol. Sci. 15, 27–32
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33 O’Regan, J.K. (1992) Solving the ‘Real’ mysteries of visual perception: The world as an outside memory. Can. J. Psychol. 46, 461–488
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36 Simons, D.J. (2000) Current approaches to change blindness. Vis. Cogn. 7, 1–15
37 Hollingworth, A. and Henderson, J.M. (2002) Accurate visual memory for previously attended objects in natural scenes. J. Exp. Psychol. Hum. Percept. Perform. 28, 113–136
38 Hollingworth, A. (2003) Failures of retrieval and comparison constrain change detection in natural scenes. J. Exp. Psychol. Hum. Percept. Perform. 29, 388–403
39 Becker, M.W. et al. (2000) The role of iconic memory in change detection tasks. Perception 29, 273–286
40 Rensink, R.A. (2000) The dynamic representation of scenes. Vis. Cogn. 7, 17–42
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42 Goodale, M.A. et al. (1986) Large adjustments in visually guided reaching do not depend on vision of the hand or perception of target displacement. Nature 320, 748–750
43 Bridgeman, B. et al. (1979) Relation between cognitive and motor- oriented systems of visual position perception. J. Exp. Psychol. Hum. Percept. Perform. 5, 692–700
44 Mitroff, S.R. and Simons, D.J. Nothing compares two views: Change blindness results from failures to compare retained information. Percept. Psychophys. (in press)
45 Simons, D.J. and Mitroff, S. (2001) The role of expectations in change detection and attentional capture. In Vision and Attention (Harris, L.R. and Jenkin, M., eds.), pp. 189–207, Springer-Verlag
46 Nisbett, R.E. and Masuda, T. (2003) Culture and point of view. Proc. Natl. Acad. Sci. U. S. A. 100, 11163–11170
47 Simons, D.J. et al. (2000) Change blindness in the absence of a visual disruption. Perception 29, 1143–1154
48 Rensink, R.A. (2000) Seeing, sensing, and scrutinizing. Vision Res. 40, 1469–1487
- Change blindness: past, present, and future
- Introduction
- Insights obtained from change blindness
- Generality of effect
- Relation to attention
- Insights into other visual processes
- Limits to what can be inferred from change blindness
- Requirements of scope
- The future of change blindness research
- References
psychology/Ilma Bio 1 (1).doc
2007PSY Mt Gravatt
1
2007PSY Biological Psychology, Mt Gravatt
Tutorial Week Four – Visual Change Blindness Experiment
Be sure to print this out this Week 4 practical handout before coming to class. You will need to it record your responses on the next page.
The final data sheet to be handed to your tutor should also be printed out – it is the file Visual Change Blindness Individual Data Sheet
People fail to detect large changes in successive views of scenes, despite lengthy inspection times, when the views do not immediately follow one another but are separate by a blanking period. This inability to detect changes across visual scene is known as change blindness. People are very poor at this task and there are many versions of this effect
Following Mondy and Coltheart (2000), we will examine how three different types of scene changes determine the level of inability to see the change. The three types of changes are: addition of objects, subtraction of objects and neither addition nor removal: objects are changed in location of colour.
Virtually all of this week’s tutorial will involve running the experiment and gathering data from you, the participants. Once the data has been collected, there will be a short discussion on some of the theories of change blindness.
The next two tutorials will be devoted to analysing the data and writing up the practical report for this tutorial. This is the second Assessment item in this course.
But for now, let’s get serious and let’s do research and gather some data.
Visual Change Blindness Experiment Record Sheet
Please place a tick (() in the columns for each slide pair presented
Addition: Some object(s) has/have been added
Subtraction: Some object(s) has/have been removed
Other: Some object(s) has/have been moved or changed colour
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No Change |
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psychology/Ilma Bio 2 (1).pdf
2007PSY Mt Gravatt 1
1
2007PSY Biological Psychology, Mt Gravatt Tutorial Week Seven Change Blindness Practical Report – Summary and Criteria A complete run-through of what to do is given in the Powerpoint
® Week 7 Change
Blindness write-up I.ppt and Week 8 Change Blindness write-up II.ppt Participants Use Descriptives and Frequencies on the data file: Change Blindness Data File final.sav Method The experiment can be done at home and is contained within the Powerpoint
® from
Week 4: Change Blindness Experiment 2014 final.ppt For the thirty-two pairs of pictures, the responses were recorded by each participantsin a response sheet: Visual Change Blindness handout.doc These were scored by viewing the following Powerpoint
®:
Change Blindness Experiment 2014 results.ppt The data for each of the four conditions were gathered together by viewing the following Powerpoint
®:
Change Blindness Experiment 2014 Data Gathering.ppt and summed data were written into the following and handed to the tutors Visual Change Blindness Individual Data Sheet.doc Because of their size, all the above Powerpoints are also available as .pdfs. Results All data handed in were recorded in the SPSS datafile: Change Blindness Data File final.sav. . What statistics to do, what graphs to do etc are given in the Powerpoint® Week 8 Change Blindness write-up II.ppt
2007PSY Mt Gravatt 2
2
Marking criteria: The assignment will be marked out of 30, broken down as follows:
Requirement Mark
Title page Including Running head, title , name & student ID, institution, word count.
-1 if not correct
Abstract Summarizes the report in 120 words maximum including the aim of the report, a brief indication of the sample and method used, the key findings and main conclusions
1
Introduction Aims, justification and review of the relevant background literature. Hypotheses based on the three different types of changes we tested – no change being the control. How did we operationalise change detection?
7
Method Participants, materials used, procedure, what are the independent variables and dependent variable. Descriptive statistics needed
3
Results and Statistics How does the distribution of data look like? Test your hypotheses using the appropriate inferential statistics. Do not forget to graphs the data with error bars.
6
Discussion Summarise the findings reported in the Results section Report conclusions regarding your hypotheses Comment on limitations (statistical or methodological) Discuss implications of your findings. Future research? This section is worth a fair bit so spend some tine on it
8
Format APA 6th Edition – also Figures, Figures captions, Tables. Do not forget to include References
2
General Is the work clearly and logically presented? Do not go over word limit
3, penalties for too long
Appendix Provide a copy of all SPSS statistical output used in writing your report.
psychology/Ilma Bio 2.pdf
2007PSY Mt Gravatt 1
1
2007PSY Biological Psychology, Mt Gravatt Tutorial Week Seven Change Blindness Practical Report – Summary and Criteria A complete run-through of what to do is given in the Powerpoint
® Week 7 Change
Blindness write-up I.ppt and Week 8 Change Blindness write-up II.ppt Participants Use Descriptives and Frequencies on the data file: Change Blindness Data File final.sav Method The experiment can be done at home and is contained within the Powerpoint
® from
Week 4: Change Blindness Experiment 2014 final.ppt For the thirty-two pairs of pictures, the responses were recorded by each participantsin a response sheet: Visual Change Blindness handout.doc These were scored by viewing the following Powerpoint
®:
Change Blindness Experiment 2014 results.ppt The data for each of the four conditions were gathered together by viewing the following Powerpoint
®:
Change Blindness Experiment 2014 Data Gathering.ppt and summed data were written into the following and handed to the tutors Visual Change Blindness Individual Data Sheet.doc Because of their size, all the above Powerpoints are also available as .pdfs. Results All data handed in were recorded in the SPSS datafile: Change Blindness Data File final.sav. . What statistics to do, what graphs to do etc are given in the Powerpoint® Week 8 Change Blindness write-up II.ppt
2007PSY Mt Gravatt 2
2
Marking criteria: The assignment will be marked out of 30, broken down as follows:
Requirement Mark
Title page Including Running head, title , name & student ID, institution, word count.
-1 if not correct
Abstract Summarizes the report in 120 words maximum including the aim of the report, a brief indication of the sample and method used, the key findings and main conclusions
1
Introduction Aims, justification and review of the relevant background literature. Hypotheses based on the three different types of changes we tested – no change being the control. How did we operationalise change detection?
7
Method Participants, materials used, procedure, what are the independent variables and dependent variable. Descriptive statistics needed
3
Results and Statistics How does the distribution of data look like? Test your hypotheses using the appropriate inferential statistics. Do not forget to graphs the data with error bars.
6
Discussion Summarise the findings reported in the Results section Report conclusions regarding your hypotheses Comment on limitations (statistical or methodological) Discuss implications of your findings. Future research? This section is worth a fair bit so spend some tine on it
8
Format APA 6th Edition – also Figures, Figures captions, Tables. Do not forget to include References
2
General Is the work clearly and logically presented? Do not go over word limit
3, penalties for too long
Appendix Provide a copy of all SPSS statistical output used in writing your report.
psychology/Ilma Red Book.pdf
School of Applied Psychology – Mt Gravatt
Griffith Health
2014
Writing for Psychology
Table of Contents Writing for Psychology………………………………………………………………………………………………...1
Research Reports in Psychology
The Research Report…………………………………………………………………………………………………..3
Title Page………………………………………………………………………………………………………………3
Abstract………………………………………………………………………………………………………………...4
Introduction……………………………………………………………………………………………………………5
Method…………………………………………………………………………………………………………………6
Results…………………………………………………………………………………………………………………7
Discussion…………………………………………………………………………………………………………….12
References…………………………………………………………………………………………………………….13
Appendices……………………………………………………………………………………………………………13
Example Research Report……………………………………………………………………………………………14
Essay Writing in Psychology
Essays for Psychology………………………………………………………………………………………………24
What does this essay mean?.........................................................................................................................................27
Example Essay for Psychology………………………………………………………………………………………29
Referencing in Psychology
Referencing in research reports and essays…………………………………………………......................................58
Referencing quotations correctly……………………………………………………………………………………61
General reference list principles……………………………………………………………………………………....62
Referencing in your reference list…………………………………………………………………………………….63
Example reference list……………………………………………………………………………………………...…63
Electronic sources…………………………………………………………………………………………………….68
Audiovisual sources......................................................................................................................................................72
Additional Points
Appendices……………………………………………………………………………………………………………76
Headings………………………………………………………………………………………………………………77
Other APA issues…………………………………………………………………………………………………..…78
Marker’s shorthand………………………………………………………………………………………………...…80
More tips for writing in Psychology……………………………………………………………………………….…82
Submitting your assignment………………………………………………………………………………………...85
Plagiarism
Plagiarism......................................................................................................................................................................92
References cited in this guide………………………………………………………………………………………...96
Useful books writing for psychology.................…………………………………………………………………...…96
Chapter by chapter changes from APA 5 to APA 6………………………………………………………………..…97
1
Writing for Psychology
Writing for Psychology will require you to develop skills in two different formats;
research reports and essays. You will also be required to have knowledge of the American
Psychological Association (APA) 6th edition referencing system. Whilst you may have previous
experience in writing an essay, it is unlikely that you will have composed a psychological
research report before coming to university. This booklet provides information on how to write
in both formats, as well as how to reference your work correctly. Some of the terms used in this
booklet may be unfamiliar to you, therefore allow yourself time to grasp these new concepts as
you progress through your studies. When in doubt, always check with your tutors and/or course
convenors.
The information has been compiled from the experience of many academic staff. Some
sections are based on another document prepared by staff in the School of Applied Psychology
(Gold Coast) and modified by Dr Mark Chappell. Credit is due to the many people who assisted
the development of this manual, including academic staff, tutors, and students – in particular,
credit is due to Andrea Quinn and Maddy Phillips who originally composed this document. We
extend our thanks as well to Wendy Muller who made the 2012 changes, to Tara Stokes and
Kylee Forrest who made comments on the example lab report, to Prof Sharon Dawe for
comments on the essay, and to Denise Hatzis, Jennifer Cheung & Tatjana Dordic for overall
feedback.
This handbook is a useful guide for all psychology undergraduate courses. And is
strongly recommended for students studying the following courses: 1001PSY, 1002PSY,
1003PSY,1008PSY, 1009PSY.
2
Research Reports in
Psychology
3
The Research Report
A research report in psychology follows a standard format, which includes the following sections
and in the order listed:
Title page
Abstract
Introduction
Method
- Participants - Design - Materials - Procedure Results
Discussion
References
Appendix/ces
An example research report is provided at the end of this section on page 14.
Title Page
The title page consists of:
Running Head: ABBRIVATED TITLE
The full title of the report
Your student name
Your student number
The course code
Your tutor’s name
Your tutorial time
The date the report is due
The date the report is submitted
The actual word count
The title provides your reader with initial cues regarding the content of the report. It needs to be
succinct and specific. The title is centred at the top of the first page with the first letter of each
major word in capitals. The word count includes the number of words in your report, excluding
the title page, reference list and appendices).
Running Head: SLEEP DEPRIVATION 1
The Effects of Sleep Deprivation on Memory
Recall
Student A. Name
Student Number: 1234567
Course: 1001PSY
Tutor: Apple Berry
Tutorial: Friday; 2-4pm
Due Date: 9 th
May, 2013
Date Submitted: 9 th
May, 2013
Word Count: 1655 words
4
Abstract
The purpose of an abstract is to provide a clear and succinct summary of the report, in less than
120 words. When writing your abstract you need to state the problem, briefly outline the
method, provide the main findings and state your conclusions. The abstract is often one of the
most difficult parts to write as it draws from each section of the report – so it makes sense to
write it last. You begin the abstract on the top of a new page with a centred heading. Use double
spacing and note that there is no paragraph indent. The most common mistakes in abstract
writing are making them too long or using redundant information. Sentences need to be precise
and meaningful.
The Running Head is an abbreviated title of your report that is presented at the top of the each
page of your report, on the same line of the page number. The words ‘Running Head’ are also
now omitted for the rest of the report.
An Example of an Abstract for a Research Report
Adapted from “Extraversion and the EEG:II. A Test of Gale’s Hypothesis” by J.G. O’Gorman and L.R. Mallise,
1984, Biological Psychology, 19, p.113. Copyright 1984 by Elsevier Science Publishers.
SLEEP DEPRIVATION 2
Abstract
The study sought to test Gale’s (1978) hypothesis that only under
moderately arousing conditions will introverts be shown to differ
from extraverts in EEG-defined arousal. Alpha activity was
recorded from 45 participants under each of six conditions, and
extravert and introvert groups formed on the basis of participants' scores on the Eysenck Personality Questionnaire.
Contrary to the hypothesis, extraverts showed more alpha
activity than introverts under all conditions except for the eyes opening and closing condition. A simple relationship between
arousal and extraversion is argued to be more likely on the basis
of these findings than the interactive relationship proposed by
Gale.
5
Introduction
The introduction begins on a new page, with the paper’s title at the top, centred, but do not write
‘Introduction’ at the top. Begin with a clear statement of your research aims and a brief
justification of the study’s relevance and/or importance. The aims are followed by a review of
theory relevant to the experiment/s and any related studies; this forms the ‘literature review’. As
author, it is your task to outline the background to your experiment, and explain to the reader
why the study was undertaken and what outcomes were expected. Typically a ‘funnelling’
approach is used; essentially, this means that you begin broadly, and narrow your focus as you
progress towards the hypothesis/es. Finally, the section ends with a statement of the hypothesis
or hypotheses to be tested.
Where appropriate, the direction of any expected association between variables will also be
stated in the hypothesis/es, and expressed in the future tense. All other paragraphs in this section
should be indented, with no spaces between paragraphs, and written in past tense or in ‘present
perfect tense’ and the active voice. An example of past tense, active voice, is “Smith (2001)
conducted the experiment…” or “Smith (2001) showed that…”. A ‘present perfect tense’
example is “researchers have shown…”. As you develop the introduction, you build a ‘picture’
for your reader, and provide the context for your study.
Common mistakes in writing an Introduction:
1. Not presenting the research aims and initial justification at the beginning of the introduction.
2. Not presenting a coherent review of relevant literature that links directly to the hypothesis/es.
3. Not defining terms appropriate to your research topic.
4. Not stating clearly what the hypotheses are. You need to tell the reader what it is that you predict will happen, based on the research and theory you have reviewed. The hypotheses
need to be stated at the end of the introduction section.
5. Not stating the direction of association between the variables to be tested. For example, when a difference between groups is predicted, you need to state what differences you anticipate.
For example, will the change in one variable have a positive or negative effect on another
variable?
6
Method
The introduction is followed immediately by the method section. This section consists of a
description of what was done in the experiment in enough detail for the reader to replicate your
study. The heading “Method” is centred and bold and sub-headings (flush against the left-hand
side, bold) guide the reader through the experiment. Paragraphs are indented.
Method
Participants
The number of participants and any particulars (e.g., age, gender, ethnicity, socio- economic
status, sexual orientation) relevant to the experiment need to be included here. For example,
details such as how your participants were recruited (e.g., volunteers, first year university
students), how they were assigned to each condition (e.g., random versus non-random
allocation), and how they were rewarded for participation (e.g., credit points, chocolates, money)
should be included here.
Design
In the design section you describe what type of research design was employed (e.g., independent
groups, repeated measures, quasi-experimental, survey). You need to state the number of
independent variables and how they were combined and the dependent variable. With each
independent variable you will need to list its name, whether it was varied within or between
participants, how many levels it had, and the label for each level. For example:
The experiment involved a 2 x 3 independent groups design, with two
types of cognitive reframing exercises (finding the silver lining, generating
alternative explanations) given to each of three age groups (20 to 50 years, 51 to
70 years, 71 years and over).
Materials
Here you describe any equipment or measures used in sufficient detail to enable the reader to
purchase or construct the same or similar, in order to repeat the experiment. If you have used a
questionnaire you should provide its name and author/s, an example of the questions, and attach
the complete questionnaire as an appendix (where you are permitted to do so under copyright
law). Do not forget to cite your source in your reference list as well. You should also include
the minimum and maximum scores achievable for your measures, and what such scores might
indicate. For example, “…a maximum score of 10 indicates high job satisfaction”. In addition,
the psychometric properties of your chosen measures should also be cited, such as any data you
have on reliability and validity. This ensures that your choice of measure can be quickly
assessed as adequate for the task.
7
Procedure
This section includes a description of what was done, in what order, and with what instructions,
again in sufficient detail to allow the experiment to be repeated. If you have controlled for a
potentially confounding variable you need to also mention this (e.g., use of randomisation,
counterbalancing). You may also need to include issues such as the use of
confederates/experimenters being blind to the hypothesis, use of control groups, deception used
by experimenters and debriefing procedures. Do not start a fresh page for this section, or the
results and discussion sections.
Results
The results section follows directly after the method section, and has a centred bold heading (no
underline). It involves specifying what data were collected and the statistics used to analyse
them. Presentation of the data is often in summary form to display essential findings for your
reader. Begin with descriptive statistics (e.g., demographics, means and standard deviations) and
then present inferential statistics (e.g., t tests, ANOVAS, correlations). The outcomes of
statistical analyses may be presented in a table or a figure with a sentence or two in text
describing the findings, for example, whether the finding was significant or not, the relevant
statistic, degrees of freedom, and the significance level adopted. You may need to refer to
statistics textbooks to ensure correct expression of statistical results according to the analysis
used – this will become increasingly important as you progress through your degree program.
An example of an appropriate results section follows:
Results
….A repeated measures t test was used to test the significance of the
difference between mean depression scores of the therapy (M = 10) and control
groups (M = 17.5). Results of the t test indicated the difference to be significant,
t(10) = 4.61, p = 009, one-tailed, meaning that participants in the therapy group
reported significantly less depression.
In the above example, a non-significant result would be presented as: t(10) = 0.72, ns, one-
tailed. It is important to note that limited interpretation of the data is offered at this stage. In
addition, EITHER a table or figure may be used to display your results, but not both. Choose the
one that best presents your findings. Please note, the above example did not report effect sizes
and confidence intervals which is a requirement of APA6, but this is considered too complex for
first year students and will be taught in your later years of study. Check with your tutor and the
marking criteria for specific details on what and how results should be presented in the report.
8
Tables
When presenting tables the table number is listed above the table title. The title itself is italicised
with the first letter of each major word Capitalized, does NOT end with a full stop, and is placed
ABOVE the table. Double line spacing is continued within tables and only horizontal lines are
used to differentiate table sections. Make sure to refer to the table in text BEFORE it appears on
the page. When labelling a table the title should be able to be understood on its own.
Generally, in text you use Times New Roman 12 point font, but, when compiling a table you can
use from 8 to 12 point font to ensure your work fits on the page. A note directly below the table
is used to explain abbreviations or symbols listed in the table. General notes are denoted by
writing the word “Note” in italics followed by a full stop (Note.). Below are examples of tables
for different statistical analyses.
If you would like further information about creating tables using APA format, follow the
guidelines in The Publication Manual of the American Psychological Association (6 th
ed, 2010).
You can find this book in the GU library (BF76.7.P83 2010).
Examples
An Example of a Table Presenting Descriptive Data
Table 1
Descriptive Data for Outcome Variables
Outcome Variable n M SD Percentage in Clinical
Range or At Risk
Depression
124
8.66
9.33
27.95
Anxiety 127 5.09 6.23 24.34
Stress 128 11.80 9.53 31.65
Violent crimes 131 2.13 7.58 19.12
Property crimes 131 1.50 8.84 12.55
9
An Example of a Table Presenting a Sample Correlation Matrix
Table 2
Intercorrelations Among Attitudes Held by GPs Towards Early Diagnosis of Dementia
1 2 3 4 5
1. Major benefits of early diagnosis -
2. Appropriate services to access .04 -
3. Early diagnosis is important .72** .19* -
4. Negative consequences from early diagnosis -.28* .14 -.13 -
5. Negative consequences from no early diagnosis .64** .19* .62** -.14 -
*p < .05. **p < .01.
An Example of a Regression Table (Hierarchical Regression)
Table 3
Hierarchical Regression Analysis for Variables Predicting Child Outcomes for Stepfamilies
________________________________________________________________________________
Variable SE
________________________________________________________________________________
Step 1
Parent Warmth -4.23 2.1 -.63*
Step 2
Stepparent Warmth -3.21 1.7 .15
Parent Control 0.47 1.9 .44*
________________________________________________________________________________
Note. R 2 = .31 for Step 1; R
2 change = .21 for Step 2 (p <.05). * p<.05.
10
An Example of an ANOVA (Analysis of Variance) Table
Table 4
Analysis of Variance for Classical Conditioning Experimental Condition
________________________________________________________________________________
Source df F p
________________________________________________________________________________
Between subjects
Depression (D) 2 0.13 .14 .32
Shock (S) 1 0.79 .08 .45
D x S 2 0.42 .15 .56
D within-group error 30 (16.48)
________________________________________________________________________________
Within groups
Blocks (B) 4 3.16** .62 .01
B x D 8 1.21 .49 .09
B x S 2 2.12* .35 .04
B x D x S 8 0.78 .24 .16
B x S within group error 128 (1.46)
________________________________________________________________________________
Note. Values enclosed in parentheses represent mean square errors.
*p < .05. **p < .01.
Figures
Figures are numbered and the title is placed UNDER the figure. Unlike tables, the figure title is
presented immediately after the figure number. Note that the figure number is italicized and the
title is not. Unlike tables, you may use a Sans Serif font (Helvetica, Futura or Geneva) in the
figure itself to enhance the readers’ understanding. Figures 1 and 2 provide examples of how to
present a figure in APA style. If you would like further information about creating figures,
follow the guidelines in The Publication Manual of the American Psychological Association
(6 th
ed, 2010). You can find this book in the GU library (BF76.7.P83 2010).
11
An Example of a Figure Presenting a Causal Relationship Between the Variables
Figure 1. Measures of child and couple factors in families (Phillips, 2002).
An Example of a Figure Presenting Descriptive Data (Means and Standard Errors)
Figure 2. Mean frequency of coping resource use (+SE) for younger (n = 96) and older (n = 106)
adults.
0
2
4
6
8
10
12
14
16
Physical Psychological Social Financial
M e a n R
e so
u rc
e U
se
Types of Coping Resources
Younger Adults
Older Adults
Relationship
Outcomes
Child Factors
Child Behaviour Checklist
Coopersmith Self Esteem
Inventory
Dyadic Adjustment Score
(individual)
Couple together or not
12
Discussion
This section follows on directly after the results section using a centred bold heading (like for the
Method and Results sections). After presenting the results in the previous section, you are
required to evaluate and interpret the implications with respect to your original hypotheses. You
will examine, interpret, and qualify the results and draw inferences and conclusions from them.
This section should open with a clear statement of the support and non-support. Do not simply
repeat points already made; each new statement should contribute to your interpretation and to
the reader’s understanding of the problem. The discussion should assist the reader to evaluate:
Whether or not the aim/s of the experiment were achieved;
The fate of any hypotheses that were tested;
The implications of the findings for theory, clinical or practical outcomes within the area of research;
Any limitations of the experiment that need to be considered when evaluating the findings; and
Directions for further research.
Common mistakes in writing the Discussion:
1. Not adequately linking your discussion to the hypotheses that you have tested. You need to make it clear whether the hypotheses are supported or not, and if not, why. If they are
supported there still may be other explanations for why this occurred.
2. Your discussion needs to link in with the points raised in your introduction and it needs to “hang together” correctly. Make sure to refer to these points in light of your findings.
3. Incorrect use of the word “significant” when discussing findings. Only use “significant” if you have tested a difference between groups using statistics. Never use the word
“insignificant” to describe your results.
4. Do not over claim about findings. It is better to understate your case by reporting exactly
what the data indicate, no more and no less. Remain factual and objective.
5. Repeating the statistic numbers from the results section.
13
References
Next in your report is the reference list. The reference section begins on a separate page
with the title “References” cantered but not bolded (unlike Method, Results and Discussion).
How to reference your source documentation is a crucial part of your writing and will be
explained in-depth in the section, “Referencing in Psychology”.
Appendices
In some research reports you may wish to include an appendix or appendices to provide
additional information that would be distracting to the reader (e.g., sample surveys, large tables)
if it was placed in the body of the report. Information concerning how to cite appendices is
provided in the section “Appendices”.
14
Example First Year
Research Report
Running head: MANIPULATION OF VISUAL PERCEPTION 1
The Manipulation of Visual Perception Through the Use of Language
Rhubarb A. Jueves
Student number: s1234567
Course Code: 1001PSY
Tutor: Domingo Pear
Tutorial time: Monday; 15:00- 16:20
Due Date: May 10 th
, 2013
Date Submitted: May 10 th
, 2013
Word Count: 1552
Check the marking criteria or speak to
your tutor regarding what is included in
your word count
MANIPULATION OF VISUAL PERCEPTION 2
Abstract
The aim of this study was to examine whether false memories can be generated by manipulating
the structure of questions in a questionnaire. Two groups of undergraduate psychology students
(225 females and 88 males) all watched a video of a car accident and answered questionnaires
based on their observations. It was hypothesised that by stating the car as blue for group B and
orange for group A, in one of the questions in a questionnaire, participants in those groups would
then falsely recall the car as being that colour a week later. This hypothesis was supported, and
so it was concluded that memory can be biased via suggestion.
The Abstract must include a sentence about each of
the following;
the aim of the study, the participants,
the findings and
some final statement about the area
Check with your tutor to find out whether an
Abstract is required and if so, if it is included the
final word count.
Remember: Continue
page numbers on the
right for the rest of the
report.
Note that the words
‘Running Head’ only
appear on page 1 and are
omitted for the rest of
the report.
MANIPULATION OF VISUAL PERCEPTION 3
The Manipulation of Visual Perception Through the Use of Language
The fabrication of false memories by suggestion is well documented, though the methods
and levels of suggestion differentiate considerably (Loftus, 2004). Zaragoza and Mitchell (1996)
examined the effect of repeated exposure to suggestion on false memories. They predicted that
frequent exposure to suggestions based on a video of a burglary, where the false presence of
items such as gloves and a gun were reinforced, would induce high incidences of participants
recollecting the items actual presence. Their results supported their claim, and further showed
that the more participants were exposed to misleading suggestions, the more descriptive and
convoluted their recollections became. According to Loftus (2004), this notion of a false
memory being real is attributed in some cases to the extent of the sensory detail involved.
Zaragoza and Mitchell (1996) interpret these results further as being the product of participants
integrating the suggestive elements with their own perception of events that transpired in the
video.
Lindsay, Hagan, Read, Wade and Garry (2004) further explored false memories by
performing an experiment based on the manipulation of childhood memories via the inclusion of
a photograph. Subjects were told three stories from their early childhood, two of which were
factual, and a third which was not. Supplementing the suggestive information with the visual
attribute of relative class photographs, was found to double the instances of participant’s false
memories. Lindsay et al. credited their findings to people’s faith in the validity of pictorial
evidence creating an authoritative influence on their confidence of the occurrence of events.
Single exposure to suggestion is also indicated to create considerable false recollections
(Zaragoza & Mitchell, 1996). This method of suggestion is demonstrated in the Loftus and
Palmer (1974) experiment in which participant’s perception of speed in response to the
Define ‘false
memories’
Provide details about how they know this;
who did what?
Link to Loftus’ concept
MANIPULATION OF VISUAL PERCEPTION 4
manipulation of verb use in a questionnaire, and the false recollection of the presence of broken
glass after viewing a video of an accident was investigated. As predicted, the use of stronger
verbs to depict the accident such as “smashed” and “collided” consequently caused the
participants perceived speed of the vehicle to be higher. Moreover, participants were more likely
to recall the presence of broken glass in the video, when stronger verbs were used, in comparison
to the use of less forceful verbs such as “bumped” and “contacted”.
The present study was designed to expand on previous studies of false memories by
testing the influence of specific word structure in questionnaires on the recall of observed events.
In Loftus and Palmer (1974), verb use was varied, where as the present experiment altered the
adjective used. It was hypothesized that a week after viewing a video of an automobile accident,
participants would falsely recall the colour of a car as blue or orange, after being exposed to
questions in a questionnaire in the previous week which either asked “Was the young man’s blue
car parked nose in or nose out?” or “Was the young man’s orange car parked nose in or nose
out?”.
Method
Participants
Two-hundred and twenty-five female and 88 male undergraduate students at Griffith
University, Mount Gravatt campus participated in this experiment during their 1001PSY
Introduction to Cognitive and Biological Psychology tutorials. The mean age of participants was
19.79 years.
What did
they
conclude?
Finish with a specific hypothesis that predicts who (or
which condition) will be faster/slower, bigger/smaller, etc.
MANIPULATION OF VISUAL PERCEPTION 5
Design
The experiment was a between subjects design, where participants were assigned to
either Group A or Group B. The independent variable was the use of either the question “Was
the young man’s orange car parked nose in or nose out?”, or “Was the young man’s blue car
parked nose in or nose out?” The dependent variable was the participant’s recollection of the
colour of the car.
Materials
A You Tube video of an automobile accident was used in this experiment in addition to 2
separate sets of questionnaires, with specifically the key questions “Was the blue (or
alternatively “orange”) car parked nose in or nose out?” and “What color was the young man’s
car?”
Procedure
This experiment was a 2 week process in which tutorial classes were labelled either as
Group A or Group B. In each group participants were asked to watch the You Tube video
“Stupid Old Man Wrecks Ferrari” (Bagleboy550, 2007). This video was watch only once and
participants were instructed to pay careful attention as they were to be asked questions on their
observations afterwards. Once viewing was complete, participants were then given a
questionnaire to fill in based on their perception of the incident. Participants of Group A were
asked the critical question “Was the young man’s orange car parked nose in or nose out?”, whilst
the participants of Group B were asked “Was the young man’s blue car parked nose in or nose
out?” These answers were then collected by the experimenter. A week later, during the same
tutorial class, at the same time of day, participants were presented with a set of different
More detail
MANIPULATION OF VISUAL PERCEPTION 6
questions based on the video. The video was not re-watched. Participants of both groups were
asked the question “What colour was the young man’s car?”
Results
Table 1 displays the results of false car colour recollections for both subject pools. These
results indicate that stating the colour of the car as orange in the questionnaire in the first week
increases the likelihood of participants of that subject pool to recall the car as actually being
orange a week later; similarly for stating the car colour as blue.
Table 1
Distribution of Subjects Recollection of the Colour of the Car
Group Orange Blue Other
A 22 18 124
B 2 50 97
Discussion
The results of this experiment suggest that memory can be biased by suggestion. This
therefore supports the hypothesis that utilising the question “Was the young man’s orange car
parked nose in or nose out” or alternatively substituting the adjective “orange” for “blue”, would
lead to the creation of a significant number of false memories when prompted “what colour was
the young man’s car?”.
This experiment also supports the findings of Loftus and Palmer (1974), where the
manipulation of the language in a questionnaire resulted in the creation of false memories of
Centre the numbers in the
table and the table should
occupy the width of the
page
The first sentence states
whether the hypothesis
was/was not supported
MANIPULATION OF VISUAL PERCEPTION 7
videos previously viewed. Both experiments were also performed for the same duration of time,
with similar numbers of participants. The findings of Lindsay, Hagan, Read, Wade and Garry
(2004) are also supported by the findings of this experiment as both were performed over a two
week period, and both incorporated visual stimuli to induce false memories.
One methodological concern is that the experiment was conducted during a period of
time when participants may have been switching tutorials and therefore there may have been an
exchange between group participants. There was also no way to prevent participants from
viewing the You Tube video again in their own time, outside of the experiment. However, due to
the low probability of occurrence, the overall results of the experiment indicate that the
hypothesis was not invalidated by this.
The results suggest that there is a certain degree of susceptibility of our minds to input
information as witnessed truths when it is in fact not. This is particularly dangerous in judicial
situations where eye-witness testimony is needed. According to Zaragoza and Mitchell (1996),
frequent exposure to misinformation during the interrogation of eye-witnesses is not an
uncommon occurrence. Faulty memories in this case could lead to innocent people being
wrongfully convicted (Loftus, 2004), thus highlighting the importance of further understanding
the creation of false memories.
In conclusion, false memories can be produced by the manipulation of language in a
questionnaire, by altering our perceptions of objects and situations which are previously viewed.
This as reflected by the results of the current experiment which shows a significant number of
participants falsely recalling the car colour as either blue or orange.
No conclusion
in lab reports
Lindsay et al. (2004) …
How could you fix this?
Relate how your results were
similar and different to previous
research
MANIPULATION OF VISUAL PERCEPTION 8
Further suggested study is a comparison between the susceptibility of the implantation of
false memories of men in contrast to women.
Put methodology and limitations
as second last paragraph;
Followed by future directions
Expand
MANIPULATION OF VISUAL PERCEPTION 9
References
Bagleboy550. (Producer). (2007, September 23). Stupid old man wrecks Ferrari [You Tube
video]. Retrieved from http://www.youtube.com/watch?v=gQnxGFYThKI
Lindsay, S. D., Hagen, L., Read, J. D., Wade, K. A., & Garry, M. (2004). True photographs and
false memories. American Psychological Society. 15, 149-154. doi: 10.1111/j.0956-
7976.2004.01503002.x
Loftus, E. F. (2004). Memories of things unseen. American Psychological Society. 13, 145-147.
doi: 10.1111/j.0963-7214.2004.00294.x
Loftus, E. F., & Palmer, J. C. (1974). Reconstruction of automobile destruction: An
example of the interaction between language and memory. Journal of Verbal
Learning and Verbal Behaviour. 13, 585-589. doi:10.1016/S0022-5371(74)80011-3
Zaragoza, M. S., & Mitchell, K. J. (1996). Repeated exposure to suggestion and the creation of
false memory. American Psychological Society. 7, 294-300. Retrieved from
http://hy8fy9jj4b.scholar.serialssolutions.com/?sid=google&auinit=MS&aulast=Zarago
za&atitle=Repeated+exposure+to+suggestion+and+the+creation+of+false+memories&i
d=doi:10.1111/j.14679280.1996.tb00377.x&title=Psychological+science&volume=7&i
ssue=5&date=1996&spage=294
References are listed in ALPHABETICAL order by first Author.
The first line is hanging and the others are indented.
Provide Author, Year, Title, Journal, Issue details as outlined in the
APA 6 th
Ed manual and the Loftus reference above.
23
Essay Writing
In Psychology
24
Essays for Psychology
The basics The following paragraphs offer some general information on how to write essays in psychology.
Firstly, the presentation of your essay begins with a title page and an abstract; refer to the
sections under ‘Psychology Research Papers’ for examples of each section. Your essay also
requires a structure that includes an introduction, body, and a conclusion (although headings are
not used). In a good essay, each section flows logically from the section before, and links
together to establish a coherent composition. Many authors advocate the use of topic sentences
to introduce each new paragraph. The topic sentence is then followed by several related
supporting statements, and a concluding statement that links to the next paragraph. For example,
the first sentence of this section ‘introduces’ the paragraph content that you have just read.
Introduction The introduction provides the framework for your essay, and may consist of two to three
paragraphs. In the introduction you orient your reader to the essay topic and provide a summary
of what you will discuss. You need to tell the reader what you are going to argue, outline any
limits to your approach to the topic, define any important words from the question, and tell the
reader what general conclusions you will arrive at. Not surprisingly, this section can
immediately influence a reader, and determine how well he or she grasps your argument later.
As a result, the importance of this section should not be underestimated.
Body The body of the essay is where you answer the question by developing your argument or analysis
in a logical manner. You may choose to use relevant definitions, quotes, examples, theory, and
research, to support your argument or analysis. Your choice of material will largely depend on
the topic, and whether you are required to ‘critically analyse’ the topic, or develop an argument –
these approaches are discussed in more detail below.
Conclusion Your conclusion should refer back to your introduction and show that you have answered the
question. Summarise your main points and indicate what the essay has succeeded in
demonstrating. This will give the reader a sense of completeness or closure. Make sure not to
introduce any new material at this stage, and do not include references in your conclusion.
A sample essay is attached at the end of this section.
25
What is ‘critical analysis’?
Critical analysis has very little to do with being critical in your writing. In fact, being
critical can bring you completely undone! What you need to do for academic papers is read
widely, compare theories with theories, and theorists with theorists. Different writers may – and
often do – have quite different ways of looking at the same problem. The nature versus nurture
debate is an excellent example. If one theorist proposed that biology was the only, or
determining factor in human development, then a large part of the picture would be missing –
that is, environmental, or learned, influences.
Your job, as a writer, is to identify the different theories pertinent to your question, and to
evaluate these in light of research evidence. For example, there may be a number of prominent
theorists who hold to a particular viewpoint. Their view may differ markedly from other
theorists who have developed their own models to explain the question or concept under review.
In addition, each ‘side’ of the argument may be supported OR discounted by research evidence.
You will need to explore the literature, and weigh up the research evidence, from which you
draw informed conclusions. Essentially, the process is an “… objective assessment of the
strengths and weaknesses of the theories and research findings involved” (Germov, 1996, p. 33).
While you come to terms with learning how to critically analyse your research material – not
simply describe it – there are some questions worth asking as you proceed. Bear in mind that a
theory is nothing more than one person’s explanation of a particular phenomenon. Ask yourself:
How much confidence do I have in the study I have just read? What aspects impressed me? What aspects bothered me? Do other studies come to different conclusions? How does the theory/study/concept fit with what I already know? (Germov, 1996)
If you can address these questions to yourself during the writing process, you will be well on the
way to developing and, most importantly, demonstrating your skill at critical analysis.
Developing an argument
Your choice of words when constructing a sentence can add a great deal to how your
work is presented. For example, if your task is to develop an argument, then you will be looking
at two or more perspectives on your subject matter. Making the different elements of your
argument clear (more difficult than it sounds) to your reader can be as simple as starting a topic
sentence or a supporting sentence thus:
26
In contrast… On the other hand… Joe Bloggs disagrees, stating that… Notwithstanding the above…
Building your essay further – using ‘connectives’
If your task is to ‘discuss’ or ‘explain’ a particular topic (as sometimes occurs in an
exam), you may feel unsure of exactly how to link meaningfully related supporting statements.
One way to attack this is to use opening phrases like:
Further to the above… In addition, … Nonetheless, it can be seen that… Following from Blogg’s ideas about blah blah, …
‘Connectives’ are used to give logical order to your work. They are usually used at the
beginning of a paragraph to help the flow of the report/essay.
Time Then, next, after, while, since, at the same time, before,
now, later
Cause-effect Therefore, consequently, as a result, hence, accordingly,
because, thus
Addition In addition, furthermore, similarly, moreover, also, next,
firstly, secondly
Summarising In summary, in conclusion, to sum up, finally
Illustration
For example, for instance, specifically, in particular
Contrast Conversely, nevertheless, however, although, whereas, on
the other hand, likewise, similarly, in comparison, in
contrast, yet, while, equally
(Learning Centre, UNSW, 1994)
27
What Does This Essay Question Mean?
Before you start researching your essay you need to ask yourself “what does this topic mean?” It can be very useful to identify key words and clarify what is expected of you. Essay
questions are generally made up of three important elements:
1. INSTRUCTIONAL word/s, that tell you what to do,
2. TOPIC word/s, that tell you about your subject, and –
3. LIMITING word/s, that defines the task boundaries. (Germov, 1996)
For example, the following essay question –
“Discuss the effects of colonisation on Indigenous Australians since
1788”.
- can be understood (dissected) in the following manner….
INSTRUCTIONAL WORD Discuss
TOPIC WORD/S colonisation, Indigenous Australians
LIMITING WORD/S since 1788
Other instructional words
Analyse Find the main ideas, how they are related and why they are important.
Compare To show the similarities or differences between two or more things,
with particular emphasis on the similarities.
Contrast To show the similarities or differences between two or more things,
with particular emphasis on the differences.
Criticise To give your judgement of something, showing its good and bad points.
It is not necessary to attack it.
28
Instructional words (continued)
Define Give the meaning of a term or word by distinguishing it from other
related terms (may use examples to do this).
Describe To give a detailed account of a subject in a logical sequence.
Discuss To investigate a subject by giving the details and explaining the positive
and negative aspects of it.
Evaluate To give your opinion on a subject by showing the advantages and
disadvantages.
Illustrate To explain by using concrete examples, comparisons or analogies.
Justify Give a statement of why you think something is so. Give reasons for
your beliefs.
Outline To give a general summary by using main points and subheadings.
Review To summarise a subject and critically analyse it as well.
Summarise To give a concise account of the main ideas of a subject.
(Learning Centre, UNSW, 1994)
29
Example
Essays for Psychology
Note from Course Convenor: THIS WAS THE ESSAY TOPIC. Title 1: Treating Schizophrenia: The role of psychological therapies (1500 -2000 words) This essay should include: i. a brief overview of the symptoms and diagnosis of schizophrenia (approx 200-300 words) ii. a brief description of the current pharmacological (drug) approach to the treatment of schizophrenia (approximately 200- 300words) iii. the key body of work in your essay should then discuss the role of psychological therapies in managing schizophrenia (approximately 700-900 words) iv. a final conclusion summarising the essay (approximately 200-300 words)
3 Starting references were provided and students asked to find a further 5 – 8 related references.
This is an example of a good to excellent first year essay. I have annotated it to highlight the strengths and also to point to areas where the essay could have been improved. We are extremely grateful to the student who allowed us to place this into the Red Book. Thanks!!
Running head: TREATING SCHIZOPHRENIA
1
Treating Schizophrenia: The Role of Psychological Therapies
Rhubarb A. Jueves
Student Number: 23092929
Course: 1009PSY
Tutor: Domingo Pear
Tutorial time: Tuesday; 2-4pm
Due Date: 21 st November, 2013
Date Submitted: 21 st November 2013
Word Count: 1520
Check the marking criteria or speak to
your tutor regarding what is included in
your word count
TREATING SCHIZOPHRENIA
2
Abstract
Schizophrenia is a disabling and complex disorder often presenting during adolescence and early
adulthood and is distinguished by three broad categories of symptoms; positive symptoms,
negative symptoms, and cognitive impairment. Treatment of schizophrenia involves the use of
antipsychotic medications that block abnormal dopamine pathways. Despite improvements in
pharmacological treatments, many of the symptoms prove difficult to manage. Psychological
therapies such as cognitive behaviour therapy (CBT) have improved outcomes in the treatment
of affective disorders which led to the specific use of CBT for psychosis (CBTp). Variability of
results range from a number of factors including the type of CBT used, to the way therapy is
delivered. Research indicates that a multifaceted approach is necessary for achieving better
outcomes.
This is a very good abstract. The
language is clear, the sentences short
and sharp and it provides an excellent
outline of the essay.
TREATING SCHIZOPHRENIA
3
Treating Schizophrenia: The Role of Psychological Therapies
Schizophrenia is a complex and debilitating disorder affecting approximately one percent
of the population (Tarrier & Wykes, 2004). Symptoms of schizophrenia emerge during
adolescence and early adulthood and mostly persist throughout life. The high economic, social
and psychological costs of schizophrenia place it among the top ten causes of long-term
disability in the world today. Research has led to both pharmacological and psychological
advances in the treatment and management of schizophrenia allowing many diagnosed with the
disorder to live a more rewarding and meaningful life within their community (Mueser &
McGurk, 2004).
Schizophrenia is distinguished by three broad categories of symptoms; psychotic
(positive) symptoms involving false beliefs, false perceptions and/or bizarre behaviours; negative
symptoms, where basic emotional and behavioural processes are diminished or absent; and
cognitive impairment, relating to attention and concentration, learning and memory, abstract
thinking and problem solving, and psychomotor speed (Mueser et al., 2004). For a diagnosis of
schizophrenia to be made two or more of the following symptoms must be present for the
duration of one month. The Diagnostic and Statistical Manual of Mental Disorders, Fourth
Edition, Text Revision (DSM-IV-TR) lists diagnostic symptoms as; delusions, hallucinations,
disorganised speech - such as incoherence, frequent derailment, grossly disorganised or catatonic
behaviour, (First & Tasman 2000, p. 640), alogia - an inability to generate spontaneous speech
(Matsumoto 2009, p.29), avolition - an inability or lack of desire to engage in motivated
activities (Matsumoto 2009, p. 73), and affective flattening (First et al., 2000, p. 640). However,
psychosis involving delusions and hallucinations is not exclusive to schizophrenia which makes
diagnosis very difficult. Criteria based on duration, dysfunction, associated substance use,
A statement about the purpose of the essay
would have been good here. Perhaps
something like “This paper will provide a
review of the current treatment approaches
to schizophrenia drawing from both
pharmacological and psychological
treatment studies.”
This is an excellent description of the
symptoms. The student understands the
concept of diagnosis and is using the current
diagnostic nomenclature from DSM IV TR
TREATING SCHIZOPHRENIA
4
bizarreness of delusions, and the presence of depression or mania are used to distinguish between
the different categories of psychotic disorders (van Os & Kapur, 2009).
Clinical management after a diagnosis of schizophrenia begins with a pharmacological
approach of antipsychotic drugs which block dopamine transmission. First generation
antipsychotics, discovered in the 1950’s such as haloperidol and chlorpromazine are effective in
the treatment of psychotic symptoms but frequently cause side-effects such as muscle stiffness,
tremors, and the neurological syndrome tardive dyskinesia which causes involuntary movements
in the body’s extremities. Evidence suggests that second–generation or atypical antipsychotic
drugs such as clozapine and aripiprazole are more clinically effective and have a better effect on
cognitive functioning then first-generation drugs. Although the side-effects of second-generation
antipsychotics have a more favourable profile they still have some potentially life threatening
drawbacks such as a dramatic lowering of the white blood-cell count (Mueser et al., 2004),
weight gain, increased triglycerides, and high cholesterol (van Os et al., 2009). However, despite
the effectiveness of anti-psychotic pharmacotherapy, a substantial number of patients experience
medication-resistant positive schizophrenia (Lindenmayer, 2000).
Research evidence supports the effectiveness of adjunct psychological therapies such as
cognitive behaviour therapy (CBT) in the treatment of both negative and positive symptoms in
drug refractory schizophrenia (Sensky et al., 2000). While other medications such as
antidepressants and mood stabilisers are frequently used in the management of schizophrenia
there is limited evidence to the benefits of polypharmacy (Mueser et al., 2004). The need for a
more effective treatment of schizophrenia has led to the use of psychological interventions such
as CBT, which has been used to treat affective disorders over the last 30 years. Cognitive
behavioural techniques in psychosis were first used by Aaron T. Beck in 1952. CBT is based on
The student could have provided some
examples of what symptoms are reduced eg
positive symptoms such as hallucinations
and delusions
Again … how are they
clinically effective?
This is a nice summary and
provides a good reason for
looking for better ways of
managing schizophrenia. A
linking sentence could have
been used here.
Not entirely correct but small errors
of fact are not fatal in a first year
essay.
TREATING SCHIZOPHRENIA
5
the general principles Beck developed for treating depression and has since been adapted for the
treatment of schizophrenia. Beck’s early theory was built on behavioural theories and the
assumption that early life experiences and social environment contributed to the forming of
schemas about the self, other people and the world, which led to distortions in cognition and
negative ways of thinking. Beck believed that by evaluating their accuracy, inaccurate negative
emotional reactions resulting from thought distortion could be reduced or extinguished (Tai &
Turkington, 2009). Although Beck started this work in 1952, which was the first evidence of the
use of psychotherapy for the treatment of delusions, his main work was with depression and
anxiety. This was a shift away from the institutional and biological dominance in psychiatric
thinking generally and schizophrenia specifically (Tarrier et al., 2004).
In the 1980’s the consistent findings on family environment prompted family
interventions to be used. These interventions were strongly behavioural and were developed to
assist in reducing relapses and to facilitate the reduction of stress to family members. The key
elements of effective family interventions include; emotional support, crisis intervention, and
training and education on dealing with the illness. Early intervention proved pivotal to better
outcomes (Dixon et al., 2010). The need to address social skills which are known to be deficient
in schizophrenia led to the development of social skills training (SST). SST incorporated three
elements of social competence and interactions such as receiving skills (social perception),
processing skills (social cognition) and how the individual responds (behavioural responding or
expression). SST targeted such elements through modelling, goal setting, positive reinforcement,
role playing, community-based homework assignments, and corrective feedback. Research
indicates that SST has a moderate to average effect on negative symptoms in schizophrenia
(Kurtz & Mueser, 2008). Schizophrenia has a major impact on education and vocational
When you use a term it is often good to
provide an example so that your reader (or
marker) is clear what you mean (and your
marker knows that you know what it
means).
Expand – how early? With
whom?
TREATING SCHIZOPHRENIA
6
development, which led to the need for a supported employment program. Evidence suggests
that employment plays a critical part in the process of recovery, improvement of social skills,
and economic functioning. Supported employment combined with training in skills development
is an empirically validated approach to vocational rehabilitation based on a “place and train”
philosophy (Mueser et al., 2004). A number of recent concepts that expand the range of CBT
strategies for use in schizophrenia are; mindfulness training - training of the mind to disengage
from unhelpful thinking, meta-cognitive approaches - based on changing the way in which
thoughts are experienced and regulated, and compassionate mind training – where emphasis is
placed on increasing awareness of negative internal hostile signals, as useful adjuncts in CBT for
psychosis (Tai et al., 2009).
As the benefits of CBT were expanded to other affective disorders it became the
treatment of choice for non-psychotic conditions. This led to the development of specialised
CBT treatments for the management of psychosis in schizophrenia. CBT was not considered as a
stand-alone therapy but an addition to already established management practices. Random
control trials, specifically in the United Kingdom Mental Health Services, have shown CBT to be
effective in the treatment of positive psychotic symptoms. The research also indicates that the
specific use of cognitive behaviour therapy for psychosis (CBTp) must be evaluated on
individual needs and effectiveness. One size does not fit all and must be considered carefully in
acute psychotic phases of the disorder as compared to its use in the chronic phases (Tarrier et al.,
2004). An example of this is the effect of CBTp on hopelessness studies which indicate that this
type of therapy may not be beneficial and perhaps even detrimental on this particular symptom
(Wykes, Steel, Everitt & Tarrier, 2008). Most studies concentrate on the chronic phase of
schizophrenia as maintenance medication does not always control the symptoms of
This is clearly demonstrating that the
student has read and understood the
importance of evaluating treatments within
the context of clinical trials: the science of
psychological treatment is key here.
TREATING SCHIZOPHRENIA
7
hallucinations and delusions (Tarrier et al., 2004). A study conducted by Zimmermann, Favrod,
Trieu and Pomini (2005), showed that CBTp had a better effect on the acute psychotic phase of
the disorder then on stabilized chronic psychotic symptoms.
Variability of results may be influenced by a number of variables such as; the type of
CBT used, the timing of the intervention, family involvement in learning CBT techniques,
individualisation of therapy, the level of therapist competence, patient therapist relationship, and
the way in which the outcome was assessed. However, all studies do indicate the usefulness of
all types of CBT in a variety of settings, interactions, and symptoms targeted (Tarrier et al.,
2004). To this end a cognitive therapy scale has been developed to measure the therapist skills in
offering CBTp. A cognitive therapy scale for psychosis CTS-PSY and the cognitive therapy for
psychosis: adherence scale, have been developed to standardise outcomes from these therapies.
The need for such scales is to quantify essential nonspecific interpersonal relationships,
adherence to treatment procedures, and individual treatments, with further scale modification
required as more specific CBTp is developed. This gives a background upon which individual
therapists can empirically measure outcomes for themselves and their clients. For evidence based
psychological treatments to be recognised within mental health services, quality evaluation
methods of precise and accurate assessment of treatment benefits must be maintained (Tarrier et
al., 2004).
As can be seen from the ongoing research, a multifaceted approach is required in the
management of schizophrenia, as no individual treatment, whether it be pharmacological,
psychological or social, can control all of the symptoms. While the use of antipsychotic drugs
may dampen the symptoms of psychosis, psychological therapy holds out hope of improved
outcomes and should be viewed as a range of therapies in the management of this complex
This is good, an area for improvement
would once again have been to include
some examples of the terms to once again
demonstrate that you the student, know
what you are talking about.
TREATING SCHIZOPHRENIA
8
disorder. Variability of results indicate that individualisation of adjunct therapy may be the
cornerstone of improved outcomes in the future treatment and management of schizophrenia.
A nice conclusion. Clear, short and well
written.
TREATING SCHIZOPHRENIA
9
References
Dixon, L. B., Dickerson, F., Bellack, A. S., Bennett, M., Dickenson, D., Goldbery, R.
W., ... Kreyenbuhl, J. (2009). The 2009 schizophrenia PORT psychosocial treatment
recommendations and summary statements. Schizophrenia Bulletin, 36, 48-70. doi:
10.1093/schbul/sbp115
First, M. B., & Tasman, A. (Ed.). (2004). Diagnostic and statistical manual of mental
disorders (4 th
ed.). West Sussex, England: John Wiley & Sons, Ltd.
Kurtz, M. M., & Mueser, K. T. (2008). A meta-analysis of controlled research on
social skills training for schizophrenia. Journal of Consulting and Clinical Psychology,
76, 491-504. doi: 10.1037/0022-006X.76.3.491
Matsumoto, D. (Ed.). (2009). The Cambridge dictionary of psychology. New York,
USA: Cambridge University Press.
Mueser, K. T., & McGurk, S. R. (2004). Schizophrenia. The Lancet, 363, 2063-2072.
Sensky, T., Turkington, D., Kingdon, D., Scott, J. I., Scott, J., Siddle, R., ... Barnes, T.
R. E. (2000). A randomized controlled trial of cognitive-behavioral therapy for
persistent symptoms in schizophrenia resistant to medication. Arch Gen
Psychiatry, 57, 165-169. doi: 10.1001/jamapsychiatry.2013.786.
Tai, S., & Turkington, D. (2009). The evolution of cognitive behaviour therapy for
schizophrenia: Current practice and recent developments. Schizophrenia
Bulletin, 35, 865-873. doi: 10.1093/schbul/sbp080
Tarrier, N., & Wykes, T. (2004). Is there evidence that cognitive behaviour therapy is an
effective treatment for schizophrenia? A cautious or cautionary tale?
Behaviour Research and Therapy, 42, 1377-1401. doi:
Although it is important to make sure that your
reference list is accurate. The “authors” of the
DSM is the American Psychiatric Association.
TREATING SCHIZOPHRENIA
10
van Os, J., & Kapur, S. (2009). Schizophrenia. The Lancet, 374, 635-645.
Wykes, T., Steel, C., Everitt, B., & Tarrier, N. (2008). Cognitive behaviour therapy
for schizophrenia: Effect sizes, clinical models, and methodological rigor.
Schizophrenia Bulletin, 34, 523-537. doi: 10.1093/schbul/sbm114
Zimmermann, G., Favrod, J., Trieu, V. H., & Pomini, V. (2005). The effect of
cognitive behavioural treatment of the positive symptoms of schizophrenia
spectrum disorders: A meta-analysis. Schizophrenia Research, 77, 1-9. doi:
10.1016/j.schres.2005.02.018
A good reference list, the student has
demonstrated that these have been read
by using them within the body of the
essay to support an argument or point.
1
Case-Scenario of Anne and Jude: A Practical Approach to Child-Care Placement
Rhubarb A. Jueves
Student Number: s8765432
Course Code: 3011PSY
Tutor: Domingo Pear
Tutorial time: Monday; 8 – 10am
Due Date: 6 th
May 2010
Date Submitted: 6 th
May 2010
Word Count: 2587 words
NOTE: This a third year level
essay, intended as a guide as your
studies progress.
Remember:
Running Head: CHILD-CARE
PLACEMENT (should be
included)
2
Case-Scenario of Anne and Jude: A Practical Approach to Child-Care Placement
The decision to consign one’s child into a child-care (CC) facility is often a difficult and
complicated stage affecting many parents (Gonzalez & Eyer, 1997). Simply put, whether CC is
“good” or “bad” for a child’s overall development is often confounded by a host of conflicting
literature (Brooks-Gunn, Han & Waldfogel, 2002). When taken together such literature presents
an array of interacting factors which may further complicate the decision making process
(Peterson & Seligman, 2004). Therefore, the aim of this essay is to assess the particular
challenges inherent in provided scenario (see Appendix) and suggest strategies for optimising the
CC experience and developmental outcome of the child. Deliberation will be made in regards to
Bronfenbrenner’s Ecological Systems Theory of Development (EST; Bronfenbrenner, 1994)
and modern literature. In order to minimise ambivalence, several assumptions will be made in
reference to the scenario: The child will be subsequently referred to as Jude; Anne and Jude are
currently residing in the United States; both are of African American ethnicity and are
categorised as low socioeconomic status (SES); high-quality CC is available in Anne’s area
thereby eliminating the need to discuss the effects of low-quality CC in general; Anne is
considering seeking full-time (over 30 hours per week) employment. The precise details of
Anne’s working arrangements, relationship status or other potentially influential factors will not
be assumed; no other assumptions regarding Anne or Jude’s biological or environmentally
shaped characteristics will be made. All literature referred to will pertain to the United States
unless otherwise stated.
Urie Bronfenbrenner (1917-2005) is credited with establishing a complete theory of
lifespan development due to its emphasis on diversity, completeness and contextual influences
(Berk, 2010). EST portrays human development as evolving through bi-directional interactions
Remember:
Abbreviated title: CHILD-CARE
PLACEMENT (should be
included)
3
between the biological organism and the ecological environment, that is, the actual environments
in which human beings live their lives (Bronfenbrenner, 1994). The ecological environment is
represented as a set of interrelated rings including the microsystem, mesosystem, exosystem,
macrosystem and chronosystem from the innermost level to the outermost respectively
(Bronfenbrenner).
The microsystem contains face to face activities and interpersonal relations in immediate
settings (Bronfenbrenner, 1994). Bronfenbrenner referred to these interactions as proximal
processes and considered them to be more influential than the environmental contexts in which
they transpire. The mesosystem contains linkages between two or more microsystems containing
the person, for example in relation to the child: The link between CC and the family
(Bronfenbrenner). The exosystem is comprised of linkages between two or more settings in
which at least one setting does not contain the developing person, for example in relation to the
child: The home setting and the mother’s workplace (Bronfenbrenner). The macrosystem can be
viewed as a particular culture’s blueprint for society and contains: Beliefs, material resources and
laws (Bronfenbrenner). The chronosystem is the time in which development takes place
including chronological development across the lifespan but also across historical time
(Bronfenbrenner). Bronfenbrenner (1974) maintained that development should be examined
within its ecological context, with the results of research directly influencing public policy. Due
to the impracticability for Anne to alter Jude’s macrosystem, and the chronosystem simply being
Jude’s current age at the present historical time, neither the macrosystem nor chronosystem will
be discussed subsequently.
Over the last 25 years the early experiences of young children have undergone a
considerable transformation (National Institute of Child Health and Human Development Early
Remember:
NO spaces between paragraphs
(as is demonstrated in this essay)
4
Child Care Research Network [NICHD ECCRN], 2006). The percentage of children that receive
regular CC prior to formal schooling has now escalated from below 25% to above 80%; with a
substantial portion of the later experiencing CC within their first two years of life (West, Denton,
& Germino-Hausken, 2000). The increasing utilisation of CC can in part be attributed to a rise
in numbers of working mothers in modern westernised society (Berk, 2010). Currently, over
60% of mothers with a child below age two are employed (Berk). Berk suggests that even
though the use of CC for infants and toddlers has become common practise, many parents are
unsure of the quality and standards of CC experiences.
An abundance of literature has examined the links between the quality of CC and the
cognitive, behavioural, language and socioemotional outcomes of children’s development
(Brooks-Gunn et al., 2002; Field 1991; Geoffroy et al., 2007; NICHD ECCRN, 2006; Vermeer,
van Ijzendoorn, De Kruif, Fukkink & Tavecchio, 2008). Typically early research highlighted
poor carer ratios, large group size, inadequate carer training; and the associated negative
outcomes in children’s immediate well-being (Belsky, 1990). In spite such findings, the NICHD
ECCRN cautions that the validity of early research may be questionable due to a lack of control
for confounds such as selection bias. The NICHD ECCRN suggests that differences in family
genetics, education and income influence the home environment and CC decisions, which in turn
are associated with CC outcomes. Consistent with this idea, Bronfenbrenner’s (1994) notion that
an individual’s genotype (genetic constitution), phenotype (observable constitution) and
microsystem structures are all influential in children’s development, may indicate that the benefit
or harm of CC is already partially determined before enrolment.
To address this issue Brooks-Gunn et al. (2002) conducted a longitudinal study in which
they examined the association between CC placement due to maternal employment within the
5
first 12 months and cognitive outcomes of children as measured within the first three years of a
child’s life. The researchers predicted that certain subgroups of the population would be
particularly at risk for poorer outcomes and that any effects may be mediated by the type of
home environment experiences. Using data from NICHD ECCRN (1999; 2000) the researchers
measured the quality of the home environment with the Home Observation of the Measurement
of the Environment Scale (HOME); and cognitive development with the Bracken School
Readiness Scale. They found that negative effects observed in children with working mothers
were pronounced in instances where mothers worked more than 30 hours per week. Moreover,
children with mothers rated as low on maternal sensitivity by the NICHD ECCRN (2006) were
categorised as being susceptible to negative outcomes. In support of this, Bradley and Vandell
(2007) noted that in instances where longer working hours were associated with low maternal
sensitivity, a reduction in positive engagement between mother and child was also observed.
In light of previous research (Bradley & Vandell, 2007; Brooks-Gunn et al., 2002) on
subgroup susceptibility, Bronfenbrenner’s (1994) emphasis on context and bi-directional
proximal processes within the microsystem seems particularly relevant. Bronfenbrenner’s view
of the ecological environment as an ever-changing and unique structure may be beneficial in
accounting for subgroup susceptibilities to maternal employment. Papero (2005) endorses this
viewpoint contending that one of the factors which substantially impacts on proximal processes
between mother and child is maternal depression. Depressed mothers typically view their
parenting style negatively; doubt their ability to have a positive impact on their child’s
development; and are reluctant to challenge their child’s opposition (Radke-Yarrow, Cummings,
Kuczynski & Chapman, 1985).
6
Although it could be argued that depression is a complex and multi-faceted phenomenon,
Papero (2005) suggests that regardless of causal diagnosis, a mother’s ability to maintain
sensitive and responsive parenting is the most crucial aspect of a child’s development and is
compromised by all forms of depressive symptomology. In contrast to this, Field (1991) claims
that the cause of maternal depression should not be discounted, and suggests that mothers under
financial strain may desire to work, and as a result become depressed while waiting for CC
openings. Moreover, financial pressure is often associated with maternal depression in instances
where mothers feel forced into employment due to desire to provide full-time maternal care
(Papero). Anne’s previous decision to leave work and provide full-time primary care for Jude
indicates that she may believe full-time maternal care is important for Jude’s development.
Therefore, Anne’s belief and financial position may place her at risk for maternal depression. In
addition, upon securing employment, excess stress resulting from working and parenting could
limit Anne’s ability to provide sensitive care (NICHD ECCRN, 2006). Consequently, it may be
reasonable to assume that Anne could benefit from regular medical examinations.
Bronfenbrenner and Morris (1998) maintain that multiple unstable characteristics of
connected systems, such as maternal depression, low income, and irregular childcare can have a
synergistic effect by reinforcing each other and producing cumulative effects that are likely to
jeopardise a child’s development. In such instances developmental benefits of regular CC may
be observed, and in which case may be explained via the compensatory/protective hypothesis
(Geoffroy et al., 2007). Geoffroy et al. elucidates that CC may act as a protective factor by
compensating for limited resources in the home environment, particularly in low SES families.
Consistent with this, Lamb and Ahnert (2006) assert that children from low SES families are
frequently enrolled in community-based CC which has superior carer-child ratios and smaller
7
group sizes than the majority of CC centres attended by children from middle SES families. In
this way, the opportunity to attend community-based CC afforded by Anne’s low SES status may
inadvertently provide a positive impact on Jude’s development. Perhaps this may be interpreted
as evidence that high quality CC can counter the reinforcing properties of synergestic effects
proposed by Bronfenbrenner and Morris (1998).
Burchinal et al. (2000) conducted a longitudinal study which examined the relationship
between the quality of CC and the associated cognitive, language and communication
development in children aged between 6 and 36 months. The researchers were particularly
interested in children deemed to be vulnerable in relation to ethnicity, CC quantity and SES. For
this reason they restricted recruitment to African American children attending at least 30 hours
per week of community based CC in low SES environments. Developmental assessments were
made using Bayley Scales of Infant Development (cognitive), Sequenced Inventory of
Communication Development (language) and Communication and Symbolic Behaviour Scales
(communication skills). The researchers found that when controlling for selection bias and
family characteristics, higher quality CC was associated with increased cognitive, language and
communication skills over time. In addition they determined that the quality of CC in infancy
tended to be poor on average, and improve linearly towards the pre-school years. Therefore, in
an effort to optimise Jude’s CC experience, it may be beneficial for Anne to utilise the three
months before Jude’s possible enrolment to compare and contrast the particular age-specific care
provided by CC centres in her area. Moreover, it may be beneficial to determine the specific
characteristics of CC which contribute to its quality and hence, its developmental outcomes
(NICHD ECCRN, 2006).
Consider:
Writing ‘and colleagues’ instead
of ‘et al’ in a sentence. Makes the
sentence more coherent. Write as
you would speak.
8
The NICHD ECCRN (2006) insists that when making predictions for a child’s
development that multiple characteristics of CC experience must be considered. The NICHD
ECCRN examined developmental outcomes at ages 15, 24, 36 and 54 months in over 1300
children that had received prior regular CC. They observed that higher quality CC (as
operationalised by cognitive and language stimulation as well as responsive and sensitive
caregiving) was associated with almost all cognitive, language, preacademic and socioemotional
developmental outcomes. In addition, they noted that children in high-quality CC were
frequently rated by caregivers as displaying more prosocial behaviours. In consideration of the
NICHD ECCRN’s stance on the importance of CC quality, Anne’s search for optimal CC may
be enhanced by comparing and contrasting the characteristics of CC quality as operationalised by
the NICHD ECCRN. In this way she may be able to refine her choices by eliminating those CC
centres that are indicative of providing lower quality experiences in regards to the operational
dimensions.
Anne’s choice of a CC centre may have direct implications for Jude according to
Bronfenbrenner’s (2006) notion of the means by which ecological environments change.
Bronfenbrenner reasons that whenever individuals add or change roles in their environment an
ecological transition results: That is, a change in the breadth of one’s microsystem.
Consequently, Anne’s decision to expand Jude’s microsystem with the addition of a new
structure (CC) would also inadvertently create an additional mesosystem (CC to family). In this
way, the caregiver-parent relationship would become an important dimension of the ecology of
children within CC (Bronfenbrenner, 1979). Consistent with this notion, Shpancer (2002)
indicates that CC outcomes are influenced by caregiver-parent relationships, which in turn are
dependent on caregivers’ perceptions of parents.
9
Shpancer (2002) suggests that caregivers’ negative evaluations of parents may stem from
their attitude towards working mothers. In support of this, Galinsky (1990) reported that 24% of
caregivers participating in the National Child Care Staffing Study had negative attitudes towards
maternal employment. Moreover, Galinsky (1990) advised that mothers are often unfavourably
perceived due to their general lack of desire for extensive communication with the caregiver.
This may partially explain Kontos and Dunn’s (1989) findings that mothers displaying a limited
knowledge of CC services and a reluctance to interact, or request advice were valued less by
caregivers. In consideration of previous research (Galinsky, 1990; Shpancer, 2002) on
perceptions of caregivers, Anne’s status as a working mother may attract negative evaluations
from CC staff. In attempting to counter such evaluations and ensure a beneficial mesosystem for
Jude, Anne may have to display enthusiasm for communication and be available for interaction
with caregivers (Kontos & Dunn, 1989).
Berk (2010) suggests that the ability to maintain developmentally favourable
mesosystems is partially dependant on the degree to which an individual’s exosystem is
conducive. Berk contends that adequate leave for parents with sick children and flexible
working schedules can enhance children’s development. In support of this, results of the data
analysis conducted by the NICHD ECCRN (2006) were directed towards the need for specific
policy changes including: Extended welfare benefits, flexible working schedules and paid
parental leave at any time within the first five years following child birth. Although directly
changing exosystem policy may be an impractical objective for Anne; the work conducted by the
NICHD ECCRN indicates that it may be beneficial for Anne to examine prospective workplace
policies, specifically in regards to employer flexibility. In this way Anne may be able to
negotiate a position within a company that is considerate of her status as a mother.
10
Subsequently, extra flexibility in the workplace may assist Anne in retaining her position, which
according to Brooks-Gunn et al. (2002) can impact positively on child development by ensuring
adequate resources in the home environment. Another method for increasing home resources is
highlighted by Brooks-Gunn (2004), who suggests that low SES families may have access to
community or home based interventions; which provide health services, social support and
parental education aimed at enhancing children’s development. In particular Anne could
consider applying for the Early Head Start program, which ensures high-quality CC for children
from low SES families (NICHD ECCRN).
Overall, CC is a complex multidimensional phenomenon (Vandell, 2004).
Developmental outcomes tend to be determined not only through multiple dimensions but also
through the subtle and dynamic interactions of their underlying components (Shpancer, 2006).
In light of this, it could be argued that the multiple systems incorporated within EST placed it in
a unique position for analysing developmental outcomes specific to Anne and Jude’s situation.
However, the multiple systems which comprise EST are often considered to be its greatest
strength and its greatest downfall (Ungar, 2002). More specifically, EST has been criticised for
neglecting to explain why connections exist and why situations occur (Ungar). Nevertheless,
Bronfenbrenner (1994) asserts that the principal goal of EST is not to validate hypotheses or
obtain answers. Bronfenbrenner maintains that the primary scientific aim of EST is to provide a
theoretical framework that when applied, will lead to advances in discovery of the processes, and
circumstances that shape the course of human development. Therefore, the main benefits of EST
may be its suitability as a complementary theory to other developmental theories, or its
usefulness in highlighting areas of importance for future developmental research.
11
By using an EST framework, modern research has been utilised to highlight Anne and
Jude’s probable challenges and formulate strategies for optimising Jude’s CC experience and
developmental outcomes. It was determined that Anne’s ethnicity, low SES, and intention to
work for 30 hours or more per week placed Jude at risk for poor developmental outcomes. This
highlighted the importance of protecting Jude from negative outcomes by providing high-quality
CC as measured by cognitive and language stimulation, and sensitive and responsive caregiving.
In addition, strategies that Anne could employ to improve the parent-caregiver relationship and
to secure flexible employment were discussed. In this way a practical or problem-solving
approach has been implemented. As a result any ambivalence regarding whether or not CC
placement is best for Anne and Jude has been reduced, and alternatively, the issue of how Anne
and Jude can make the best of CC has been presented.
12
References
Belsky, J. (1990). Parental and nonparental child care and children’s socioemotional
development: A decade in review. Journal of Marriage and Family, 54, 885-903.
Retrieved from http://www.jstor.org.libraryproxy.griffith.edu.au/stable/353308
Berk, L. E. (2010) Development through the lifespan (5th ed.). Boston, MA: Allyn & Bacon.
Bradley, R. H., & Vandell, D. L. (2007). Child care and the well-being of children. Archives of
Pediatrics and Adolescent Medicine, 161, 669-676. doi: 10.1001/archpedi.161.7.669
Bronfenbrenner, U. (1974). Ecology of childhood. Child Development, 45, 1–5.
Bronfenbrenner, U. (1979). The ecology of human development: Experiments by nature and
design. Cambridge, MA: Harvard University Press.
Bronfenbrenner, U. (1994). Ecological models of human development. In M. Gauvain, & M.
Cole (Eds.), Readings on the development of children (3rd ed., pp. 3-8). New York:
Freeman.
Bronfenbrenner, U., & Morris, P. A. (1998). The ecology of developmental processes. In W.
Damon, & R. M. Learner (Eds.), Handbook of child psychology: (5th ed., pp. 993–1028).
New York: Wiley.
Bronfenbrenner, U., & Morris, P. A. (2006). The bio-ecological model of human development.
In R.M. Learner (Ed.), Handbook of child psychology (6th ed., pp. 297-342). Hoboken, NJ:
Wiley.
Brooks-Gunn, J. (2004). Intervention and policy as change agents for young children. In P.L.
Chase Lansdale, K. Kiernan, & R.J. Friedman (Eds.), Human development across lives and
generations: The potential for change (pp. 293-340). New York, NY: Cambridge
University Press.
Remember:
Centre and NO bold (as
demonstrated here).
13
Brooks-Gunn, J., Han, W. J., & Waldfogel, J. (2002). Maternal employment and child cognitive
outcomes in the first three years of life: The NICHD ECCRN study of early child care.
Child Development, 73, 1052-1072. doi: 10.1111/1467-8624.00457
Burchinal, M. R., Roberts, J. E., Riggins, R., Zeisel, S. A., Neebe, E., & Bryant, D. (2000).
Relating quality of center-based child care to early cognitive and language development
longitudinally. Child Development, 71, 339-357. doi: 10.1111/1467-8624.00149
Field, T. (1991). Quality infant day-care and grade school behaviour and performance. Child
Development, 62, 863-870. Retrieved from http://www.jstor.org.libraryproxy.griffith.
edu.au/stable/1131183
Galinsky, E. (1990). Why are some parent/teacher partnerships clouded with difficulties? Young
Children, 45(1), 38–39.
Geoffroy, G., Cote, S. M., Borge, A. I. H, Larouche, F., Seguin, J. R., & Rutter, M. (2007).
Association between nonmaternal care in the first year of life and children’s receptive
language skills prior to school entry: The moderating role of socioeconomic status Journal
of Child Psychology and Psychiatry, 48, 490–497. doi 10.1111/j.1469-7610.2006.01704.x
Gonzalez-Mena, J. & Eyer, D. W. (1997). Infants, toddlers and caregivers. Mountain View, CA:
Mayfield.
Kontos, S., & Dunn, L. (1989). Attitudes of caregivers, maternal experiences with day care, and
children’s development. Journal of Applied Developmental Psychology, 10 (1), 37–51.
doi:10.1016/0193-3973(89)90013-0
Lamb, M. E., & Ahnert, L. (2006). Nonparental child care: Context, concepts, correlates, and
consequences. In K. A. Renninger, & I.E. Sigel (Eds.), Handbook of child psychology (6th
ed., pp. 700-778). Hoboken, NJ: Wiley.
Remember:
The addition of ‘doi’ reference, if
journal articles are obtained
online. This complies with APA
6.
14
NICHD (National Institute of Child Health and Human Development) Early Child Care Research
Network. (2006). Child-care effect sizes for the NICHD Study of Early Child Care and
Youth Development. American Psychologist, 61, 99-116. doi: 10.1037/0003-
066X.63.3.146
Papero, A. L. (2005). Is early, high-quality daycare an asset for the children of low-income,
depressed mothers? Developmental Review, 25(2), 181-211. doi:10.1016/j.dr.2004.10.001
Peterson, C., & Seligman, M. E. (2004). Character strengths and virtues. New York: Oxford
University Press.
Radke-Yarrow, M., Cummings, E. M., Kuczynski, L., & Chapman, M. (1985). Patterns of
attachment in two- and three-year-olds in normal families and families with parental
depression. Child Development, 56, 884–893. Retrieved from
http://www.jstor.org.libraryproxy.griffith.edu.au/stable/1130100
Shpancer, N. (2006). The effects of daycare: Persistent questions, elusive answers. Early
childhood research quarterly, 21, 227-237. doi:10.1016/j.ecresq.2006.04.006
Ungar, M. (2002). A deeper, more social ecological social work practice. The Social Service
Review, 76(3), 480-497. doi: 10.1086/341185
Vandell, D. L. (2004). Early child care: The known and the unknown. Merrill-Palmer Quarterly,
50, 387–414. doi: 10.1353/mpq.2004.0027
Vermeer, H. J., van Izjendoorn, M. H., De Kruif, R. E. L., Fukkink, R. G., & Tavecchio, L. W.
C. (2008). Child care in the Netherlands: Trends in quality over the years 1995-2005. The
Journal of Genetic Psychology, 169, 360-385. doi: 10.3200/GNTP.169.4.360-385
West, J., Denton, K., & Germino-Hausken, E. (2000). America’s kindergartens. Washington,
DC: National Center for Education Statistics.
15
Appendix
1) Anne is the parent of a 9-month-old child. When her child was born, she decided to give up
work to become a full-time parent and primary caregiver. Due to financial difficulties, however,
she is now considering going back to work in 3 months time and placing her child in a day-care
nursery. Discuss the pros and cons of doing this with reference to developmental research and
theories.
57
Referencing
In Psychology
APA 6
58
Referencing in Research Reports and Essays
‘In-text’ referencing is the means by which you acknowledge the source documentation used in
your written work. Like other academic disciplines, psychology requires you to apply a
consistent style of referencing throughout your work.
One work by a single author
Erikson (1963) introduced a lifespan perspective to the developmental progression of
human beings.
OR
The developmental progression of human beings is often viewed according to a lifespan
perspective (Erikson, 1963).
One work by two authors
Too much parental control may lead to a child’s inhibition of self-expression (Papalia &
Olds, 1995).
OR
According to Papalia and Olds (1995), too much parental control may lead to a child’s
inhibition of self-expression.
One work by three to five authors (you only need to cite the names of all the authors the first time you use them)
In their seminal work on childhood attachment, Smith, Smith, and Bloggs (1997) asserted
that… (first citation)
In a later study, Smith et al. (1997) replicated their original results with one major
difference… (second citation)
One work by six or more authors (you only cite the name of the first author with et al. each time you cite the reference)
According to Jones et al. (2000), emotional expression in the families of people with
schizophrenia is … (every citation)
OR
The research to date on marital happiness in stepfamilies is problematic because it is based on a
comparison with the marital happiness of first marriage families (Gray et al., 1998).
59
Authors with the same surname
Use the authors’ initials in all citations to avoid confusion. For example:
S. Freud and A. Freud (1929) both averred the significance of early childhood
experience.
Citing two or more sources for the same concept
1. List your sources in alphabetical order of authors’ names.
Recent theorists have contributed substantially to our understanding of Post
Traumatic Stress Disorder as a product of family dysfunction (Herman, 1994;
Terr, 1995; Van Der Kolk, 1996).
2. If the publications are by the same author, order them according to year of publication.
Later writers acknowledged the possibility that family dysfunction may affect the
emergence of PTSD symptoms (Terr, 1993, 1994, 1995).
3. If the publications are by the same author AND are in the same year, add suffixes to your references to distinguish one from another.
Terr acknowledged the possibility that family dysfunction may affect the
emergence of PTSD symptoms in children (1994a, 1994b).
Citing an author’s ideas that are listed in another
person’s book/article
First avoid using secondary sources; it is always better to seek out the original source. When you
reference an author’s idea that is listed in another person’s book/article you need to include the
name of the original author/s (e.g., Kohut) together with the author and date of the book/article
from which you have cited the information/idea (e.g., as cited in Goldstein, 1990). For example:
According to Kohut (as cited in Goldstein, 1990), broader insight, greater
autonomy of ego functions, and increased control over impulsiveness may
accompany these gains.
In the reference list you only include the details of the journal/book which you have read
yourself (e.g., Goldstein, 1990).
60
Citing electronic material in text
To cite a specific part of an electronic source, indicate the page, chapter, figure, table, or
equations in text, as shown in the example below.
(Cheek & Buss, 1981, p. 332) or (Shimamura, 1989, chap. 3)
Note: For internet articles which do not provide page numbers, use the paragraph number,
preceded by the paragraph symbol ¶ or the abbreviation para (e.g., Myers, 20000, ¶ 5). If neither
paragraph nor page number are visible, cite the heading and the number of the paragraph
following it to direct the reader to the location of the material (e.g., Beutler, 2000, Conclusion
section, para. 1).
Referencing within a paragraph
Once you have referenced to a study in a paragraph, you do not need to include the year of
the citation again (in subsequent references to the same study) as long as the study cannot be
confused with other studies.
In a recent study of reaction times, Walker (2000) described the method… Walker also
found…
Personal communications
Personal communications including email messages, private conversations or interviews
that you conducted with another person, should be cited in-text but because they do not contain
recoverable data, do NOT cite them in your reference list. To cite a personal communication in-
text, provide initials and last name of the communicator, the personal communication, and an
approximate date in your essay. For example:
P. Smith also claimed that many of her students had difficulties with APA style (personal
communication, November 3, 2002).
Lecture material
Similar to personal communications material presented during a lecture should be cited in-
text but NOT in your reference list, unless it is ‘recoverable’ material (i.e., posted on a public
website). An example of how to reference a lecture in-text is provided below:
In an Introduction to Literature lecture at Capital Community College on April 14, 2004,
Professor Charles Darling described William Carlos Williams’ poem as a barnyard snapshot (C.
W. Darling, ENG 102 lecture, April 14, 2004).
61
Referencing Quotations Correctly
Quotes should be used sparingly; it is better to show the reader that you understand the material
by writing it in your own words. However, there are times when a succinct and clear quotation
can enhance the readability of your essay. Quotes should be clearly indicated by double
quotation marks if less than 40 words, and by indenting them five to seven spaces (or ½ an inch)
if 40 or more words. Quotes and other key items of information need to be appropriately
referenced, indicating the author, date of publication and page number.
Examples of short quotes in text (less than 40 words)
Example 1:
This is not to say that borderline personality organisation is transitory or fluctuating, but
rather a stable pathological structure that becomes “entrenched and fixed, and affects all later
personality functioning” (Goldstein, 1990, p. 19).
Example 2:
According to Goldstein, Kernberg “hypothesises too much aggression as
etiologic, [but] he does not say what causes this overabundance of aggression” (1995, p.
330).
Example of a large quote (40 or more words)
According to Kernberg (1989) people with borderline personality disorder are:
…those who present serious difficulties in their interpersonal relationships and
some alteration of their experience of reality but with essential preservation of
reality testing. Such patients also present contradictory character traits, chaotic
coexistence of defences against and direct expression of primitive “id contents”
in consciousness (p. 130).
62
Omission of words in a quote
If you have a long direct quote that has words which are redundant to your point you can
omit a section. To do this you need to use three full stops (…) to highlight your omission.
General Reference List Principles
Authors’ names Invert authors’ names (i.e., give the surname first, then the initials). Separate surnames from
initials with a comma. Separate initials with a full stop and a space. Separate different names
with a comma. For two or more authors, separate the last name from the rest with a comma, then
an ampersand (“&”). Do not use ‘et al.’ in the reference list. Always give all the authors’
names. When referencing the editors of a book you need to list the author’s initials first,
followed by their surname. See the book chapter example on the previous page.
Date Provide the year of publication of the reference in brackets followed by a full stop. For books,
this is the most recent copyright date, and is usually found on the page after the title page. For
journals the year is the publication date of the journal. For translations, give the date of the
translation, and add the date of the original work in parentheses after the end of the reference.
Title Provide the title of the reference exactly as it appears in the original, including the original
spelling. Capitalise the first letter only of book, journal article, and book chapter titles and the
first letter of a word appearing after a colon ‘:’ in the title. Capitalise all major words in journal
titles. Italicise book titles and journal titles.
Format Use a hanging indent of five to seven spaces (½ an inch) and double space each reference.
Order References must be in alphabetical order of first author’s surname. Do not number references.
One-author references precede multiple-author references beginning with the same surname {e.g., Alleyne, R. L. (2001) precedes Alleyne, R. L., & Evans, A. J. (1999)}
References with the same first author and different second or third authors are arranged alphabetically based on surname of the second or third author. (e.g., Gosling, J. R., & Jerald,
K. (2000) precedes Gosling, J. R. & Telvin, D. F. (1996)}.
63
References with the same author(s) in the same order are arranged by year of publication, the earliest first (e.g., Cabading, J. R., & Wright, K. (2000) precedes Cabading, J. R., & Wright,
K. (2001)}.
References with the same author(s) and year, are arranged alphabetically by the first word of the title, and distinguish references by single lower case letters immediately after the year
(e.g., Smith, 1997a).
Referencing in your Reference List
The reference section begins on a new page with a centred heading (no bold or underline). The
reference list is only to include those references you have cited in your assignment. Below are
some examples of how to reference the more common items. (You may need to check the APA
Publication Manual (6 th
ed.) for those not covered here).
An Example of a Reference List
Basic Forms for Sources in Print
Journal Article (print copy)
APA COMPONENTS
Author, A. A., Author, B. B., & Author, C. C. (year). Article title. Journal Title Italicized and
Capitalised, volume number also italicized, (issue number if applicable, but not
italicized), start page-finish page.
Example:
Lindsay, S. D., Hagen, L., Read, J. D., Wade, K. A., & Garry, M. (2004). True photographs and
false memories. American Psychological Society. 15, 149-154.
Journal Article (electronic copy/ retrieved electronically) (For articles received from online publications that are exact duplicates of those in print versions – see later section
on ‘Referencing Internet Periodicals’ for more information)
APA COMPONENTS
Author, A. A., Author, B. B., & Author, C. C. (year). Article title. Journal Title Italicized and
Capitalised, volume number also italicized, (issue number if applicable, but not
italicized), start page-finish page. doi:
64
Example:
Lindsay, S. D., Hagen, L., Read, J. D., Wade, K. A., & Garry, M. (2004). True photographs and
false memories. American Psychological Society, 15, 149-154. doi: 10.1111/j.0956-
7976.2004.01503002.x
Journal Article in Press (posted online in a pre-print archive)
APA COMPONENTS
Author, A. A. (in press). Article title. Journal Title Italicized and Capitalised. Retrieved from
URL
Example:
Briscoe, R. (in press). Egocentric spatial representation in action and perception. Philosophy
and Phenomenological Research. Retrieved from http://cogprints.org/5780/1/ECSRAP.
F07.pdf
Books
APA COMPONENTS
Author, A. A. (year). Book title italicized. Place of publication: Publisher.
Example: Bacal, H. A., & Newman, K. M. (1990). Theories of object relations: Bridges to self psychology.
New York, NY: Columbia University Press.
E-Books (Electronic version of a print book)
APA COMPONENTS
Author, A. A. (year). Book title italicized [Adobe Digital Editions version]. doi:
Example: Schiraldi, G. R. (2001). The post-traumatic stress disorder sourcebook: A guide to healing,
recovery, and growth [Adobe Digital Editions version]. doi:10.1036/00713937722
E-Books (where there is no print version)
65
APA COMPONENTS
Author, A. A. (n.d.). Book title italicized. Retrieved from http
Example: O’Keefe, E. (n.d.). Egoism & the crisis in Western values. Retrieved from http://www.
onlineoriginals.com/showitem.asp?itemID=135
Book Chapters
APA COMPONENTS
Author, A. A., & Author, B. B. (year). Chapter title. In A. Editor & B. Editor (Eds.), Book title
italicized (pp. start page-finish page). Place of publication: Publisher.
Example:
Cooper, S. H. (1993). The self construct in psychoanalytic theory: A comparative view. In Z. V.
Segal & S. J. Bladd (Eds.), The self in emotional distress: Cognitive and psychodynamic
perspectives (pp. 41-67). New York, NY: Guilford.
A Book or Article with no Author Named
APA COMPONENTS
Title of article or book italicized. (year). Place of publication: Publisher.
Example:
Merriam-Webster’s collegiate dictionary (10th ed.). (1993). Springfield, MA: Merriam-
Webster.
Newspaper Article
APA COMPONENTS
Author, A. A. (year, month date). Article title. Newspaper Title Italicized and Capitalised, page
number (p.) or page numbers (pp.).
Example:
Schwartz, J. (1993, September 30). Obesity affects economic, social status. The Washington
Post, pp. A1, A4.
66
Brochure
APA COMPONENTS
Government or Corporate Agency. (year). Brochure title italicized [Brochure]. Place of
Publication: Author.
Example:
Research and Training Centre on Independent Living. (1993). Guidelines for reporting and
writing about people with disabilities (4 th
ed.) [Brochure]. Lawrence, KS:Author.
Reports from the Government and Other Organizations
APA COMPONENTS
Government Agency, Group or Authors. (year). Report title italicized (report, contract or
monograph number). Place of publication: Publisher.
Example:
National Institute of Mental Health. (1990). Clinical training in serious mental illness
(DHHS Publication No. ADM 90-1679). Washington, DC: U.S. Government Printing
Office.
Published Doctoral Thesis
APA COMPONENTS
Author, A. A. (year). Title of thesis (Doctoral thesis, Name of University, City, Country).
Retrieved from http
Example:
Horrigan, L. M. (2006). A prardox-based approach to the study and practice of organizational
change (Doctoral thesis, Griffith University, Brisbane, Australia). Retrieved from
http://www4.gu.edu.au:8080/adt-root/uploads/approved/adt-QGU20061023.132401/
public/02Whole.pdf
67
Published Conference Papers
APA COMPONENTS
Author, A. A., & Author, B. B. (year). Paper title. Proceedings of the Name of
Conference, Place of conference, volume number italicized, start page-finish page.
Example:
Cynx, J., Williams, H., & Nottebohm, F. (1992). Hemispheric differences in avian song
discrimination. Proceedings of the National Academy of Sciences, USA, 89, 1372-1375.
Unpublished Conference Papers
APA COMPONENTS
Chairperson, A. A. (Chair), Author, A. A., & Author, B. B. (year, month). Title of talk
itaclicized. Symposium conducted at the meeting of the Title of Organisation, Place of
symposium.
Example:
Rosenthal, T. L. (Chair), Lichstein, K. L., Johnson, R. S., Womack, T. D., Dean, J. E., &
Childers, C. K. (1990, June). Relaxation therapy for poly-pharmacy use in elderly
insomniacs and noninsomniacs. Symposium conducted at the meeting of the First
International Congress of Behavioral Medicine, Uppersala, Sweden.
Magazine Article (print copy)
APA COMPONENTS
Author, A. A., Author, B. B., & Author, C. C. (year, month date). Article title. Magazine title
italicized, volume number also italicized, (issue number if applicable, but not italicized),
start page-finish page.
Example:
Henry, W. A., III. (1990, April 9). Making the grade in today’s schools. Time, 135, 28-31.
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Journal Article with eight or more authors
For references with six or seven authors, list all the names in the reference. However, if there
are more than seven authors then list the first six then insert ellipses and add the last author’s
name.
APA COMPONENTS
Author, A. A., Author, B. B., & Author, C. C., Author, D. D., Author, E. E., Author, F.
F.,…Author, Z. Z. (year). Article title. Journal title italicized, volume number also
italicized, (issue number if applicable, but not italicized), start page-finish page. doi:
Example:
Spector, P. E., Allen, T. D., Poelmans, S. A. Y. Lapierre, L. M., Cooper, C. L., O’Driscoll,
M.,…Widerszal-Bazyl, M. (2007). Cross national differences in relationships of work
demands, job satisfaction, and turnover intentions with work-family conflict. Personnel
Psychology, 60, 805-835. doi: 10.1111/j.1744-6570.2007.00092.x
Electronic Sources
There are two major guidelines for citing Internet sources:
1. Whenever possible reference specific documents rather than home or menu pages; 2. Provide addresses that work.
The 6th edition of the APA guide recommends using ‘DOI’ numbers over web addresses,
because DOIs are designed to be more stable, whereas web addresses (URLs) quite often change.
The minimum requirement for citing Internet references includes the document title or
description, the date of publication AND/OR retrieval, and the Digital Object Identifiers (DOI),
or failing that, an Internet address (the universal retrieval link referred to as the URL). Wherever
possible, the author/s of the document should also be included. If the author/s is/are not
identified, the document title may be used instead. Use (n.d.)., when a publication date is not
available. It is crucial that the DOI or the URL is transcribed to your document as faithfully as
possible, as the smallest error may render the DOI or the URL inaccessible. We suggest you
copy and paste the DOI or URL so that the alphanumeric string is exact.
Please provide the DOI if one has been assigned to the content. Publishers who follow best practice publish the DOI clearly on the first page of an article.
Use this format in references: doi:xxxxxxxxx
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When a DOI is used, no additional retrieval information is required to identify or find the content.
If no DOI has been assigned to the material, provide the URL (web address).
The components of a URL are as follows:
Protocol Host Name Path to Document File name of specific
document
http: // www.apa.org / monitor/oct00 / workplace.html
The protocols recognized by most browsers are hypertext transfer protocol (http), hypertext
transfer protocol secure (https), and file transfer protocol (ftp). All protocols should be followed
by a colon and two forward slashes (e.g., http://). The host name identifies the server on which
the files reside, which is often the address for an organization’s home page (e.g.,
http://www.apa.org is the address for APA’s home page). Although many host names start with
‘www’ not all do. The rest of the address indicates the directory path leading to the document.
Ensure that you reproduce this part of the URL exactly as it appears (with uppercase and
lowercase letters and all punctuation). Note also that Internet-only citations appearing in your
reference list DO NOT end with a period or full-stop (.), because punctuation marks have a
different meaning in the context of URLs.
Referencing Internet Periodicals
Journal Article (retrieved electronically over the internet –
based on a print source)
APA COMPONENTS
Author, A. A., Author, B. B., & Author, C. C. (year). Article title. Journal Title Italicized and
Capitalised, volume number also italicized, (issue number if applicable, but not
italicized), start page-finish page. doi:
Example:
Lindsay, S. D., Hagen, L., Read, J. D., Wade, K. A., & Garry, M. (2004). True photographs and
false memories. American Psychological Society. 15, 149-154. doi: 10.1111/j.0956-
7976.2004.01503002.x
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Article in an Internet-Only Journal
APA COMPONENTS
Author, A. A., & Author, B. B. (Date of publication). Title of article. Title of journal,volume
number italicized. Retrieved from http://hostname/pathtodocument/filename
Example:
Fredrickson, B. L. (2000, March). Cultivating positive emotions to optimize health and well
being. Prevention and Treatment, 3. Retrieved from http://journals.apa.org/
prevention/volume3/pre0030001a.html
Referencing Internet Non-periodicals
Stand-Alone Internet Document
APA COMPONENTS
Author, A. A., & Author, B. B. (Date of publication). Document title italicized. Retrieved
from http://hostname/pathtodocument/filename
Example:
Dewey, R. A. (2002). Psych web by Russ Dewey. Retrieved from http://www.psywww.com
Multi-page Internet Document by an Organization
APA COMPONENTS
Name of Organization (Date of publication). Document title italicized. Retrieved from
http://hostname/pathtodocument/filename
Example:
Greater New Milford (Ct) Area Healthy Community 2000, Task Force on Teen and Adolescent
Issues. (2000). Who has time for a family meal? You do! Retrieved from
http://www.familymealtime.org
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Section or Chapter of an Internet Document
APA COMPONENTS
Author, A. A., & Author, B. B. (Date of publication). Title of chapter or section. In Title of book
or larger document italicized (chapter or section number). Retrieved from
http://hostname/pathtodocument/filename
Example:
The Foundation for a Better World. (2000). Pollution and banana cream pie. In Great chefs cook
with chlorofluorocarbons and carbon monoxide (Chap. 3). Retrieved from
http://www.bam.com/cream/pollution/bananas.html
The above examples do not cover all the possibilities for referencing Internet sources.
Therefore, it will be important to check the APA Publication Manual if your citation type is not
included above. One of the problems often encountered by markers is that Internet sources cited
by students are not considered sound for academic purposes. Try to avoid this by ensuring your
references are appropriate scientific sources.
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Audiovisual Sources
A Podcast
APA COMPONENTS
Producer, P. P. (Producer). (Year posted, date posted). Title of podcast italicized [Audio
podcast]. Retrieved from web address.
Example:
Chappell, M. (Producer). (2013, March 14). 14 Mar 2013 – 14:00 [Audio podcast]. Retrieved
from https://learning.secure.griffith.edu.au/webapps/portal/frameset.jsp?tab=courses&url
=/bin/common/course.pl?course_id=_93665_1&frame=top
A You Tube video
APA COMPONENTS
Producer, P. P. (Producer). (Year posted, date posted). Title of You Tube video italicized [You
Tube video]. Retrieved from web address.
Example:
Bagleboy550. (Producer). (2007, September 23). Stupid old man wrecks Ferrari [You Tube
video]. Retrieved from http://www.youtube.com/watch?v=gQnxGFYThKI
A Motion Picture
APA COMPONENTS
Producer, P. P. (Producer), & Director, D.D. (Director). (Date of publication). Title of motion
picture italicized [Motion picture]. Country of origin: Studio or distributor.
Example:
Smith, J.D. (Producer), & Smithee, A.F. (Director). (2001). Really big disaster movie [Motion
picture]. United States: Paramount Pictures.
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A Television Broadcast or Television Series
APA COMPONENTS
Producer, P. P. (Producer). (Date of broadcast or copyright). Title of broadcast italicized
[Television broadcast or Television series]. City of origin, State [or country if outside
USA]: Studio or distributor.
Example:
Important, I.M. (Producer). (1990, November 1). The nightly news hour. [Television broadcast].
New York, NY: Central Broadcasting Service.
A Music Recording
APA COMPONENTS
Songwriter, W. W. (Date of copyright). Title of song [Recorded by artist if different from song
writer]. On Title of album italicized [Medium of recording: CD, record, cassette, etc.].
Location: Label. (Recording date if different from copyright date).
Example:
Taupin, B. (1975). Someone saved my life tonight [Recorded by Elton John]. On Captain
fantastic and the brown dirt cowboy [CD]. London, England: Big Pig Music Limited.
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Referencing driving you nuts? Check out the interactive referencing tool available from the library website
– you just click what components your reference has and it tells you what
format you need – very sweet for those ‘experiential’ learners (i.e., those of
us who hate to read manuals but prefer to jump right in) and also brilliant for double degree
students who may need to use a different style for their other major.
http://www.griffith.edu.au/library/workshops-training/self-help-resources/referencing
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Additional
Points
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Appendices
Appendices can be used in both lab reports and essays, and are used to provide the reader
with specific information that would be distracting if it was placed in the body of your work.
Appendixes should be placed after your reference list.
Common Types of Appendices
Common types of appendices include (but are not limited to) the following:
A sample of questionnaire items or other survey instruments used in the research; A figure or table of stimuli or other apparatus used during the research; Important information that you cannot fit within your essay due to the word count; Additional statistical tables or figures.
Labelling Appendices
If you only have one appendix in your paper, simply label it “Appendix” If you have two or more appendices, label each one with a capital letter (e.g., Appendix A,
Appendix B etc.). Appendices MUST be labelled in the order in which they are mentioned in
your paper.
In your paper be sure to refer to each appendix by their labels, for example “…. as shown in Appendix A.”
APA Format for Appendices
The APA guidelines concerning how to format your essay or lab report also apply to appendices.
Headings
When it comes to headings, treat your appendices as a separate document to the rest of your paper. For example, the body of your paper can have four levels of heading, but your appendix
may only have two levels (therefore treat your appendix as a two-level heading paper).
Table and Figure Numbers
Number each appendix table and figure as separate from the rest of your paper. Precede the number with the letter of the appendix it is included within. For example if you
have two appendices with two tables in each you would label them Table A1, Table A2,
Table B1, Table B2 etc.
If you only have one appendix precede all table and figure numbers with an “A” to distinguish them from those in the main text.
Copyright Issues
Be sure to determine whether permission is required from the copyright holder before including another author’s test or questionnaire within an appendix.
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Headings
Levels of headings There are a number of levels of headings recommended by the APA. In most
psychological reports, you will probably only use a few of these, and the same will be true of
essays.
Level 1 Centred, Boldface, Uppercase and Lowercase Heading
Level 2 Flush Left Boldface, Uppercase and Lowercase Heading
Level 3 Indented, boldface, lowercase paragraph heading ending with a period.
Level 4 Indented, boldface, italicized, lowercase paragraph heading ending
with a period.
Level 5 Indented, italicized, lowercase paragraph heading ending with a
period.
When writing psychological laboratory reports, you will generally use Levels 1, 2 and 3
for your headings.
Method Level 1
Materials Level 2
Auditory stimuli Level 3
The weird thing is, however, that ‘Abstract’ and the title of your report (which appears in place
of a title for the introduction) are centred just as a level 1 heading are, but they are not
boldface… just another of APA’s quirks.
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Other APA Issues
Abbreviations Abbreviations should be avoided. Do not use the following abbreviations in text instead write
their meaning in full. For instance, instead of writing etc., use "et cetera" or “and so forth”;
instead of vs., use “versus”; instead of i.e. use “that is”, and write “for example” instead of e.g.
Acronyms Acronyms can be employed but only after the term is expressed fully the first time it is used, and
then followed by the abbreviation in parentheses. For example:
Post-traumatic stress disorder (PTSD) has been described ...
“Affect” versus “effect” Many people get these two words confused. “Affect” is usually used as a verb and “effect” can
be a noun or verb. See the example below.
The effect [result] of the medication was substantial.
Parenting behaviours were found to affect [influence] the child’s behaviour.
Bias in writing The following are some guidelines for writing about participants with respect.
1. Avoid ambiguity in gender identity by choosing nouns or pronouns that describe your participants. For example, the word policemen suggests male police officers whereas the
word police officers suggests male and female officers.
2. Sexual orientation is a preferable to sexual preference. “Preference” suggests a level of voluntary choice that is not necessarily reported by lesbians and gay men. The terms lesbians
and gay men are preferable to homosexuals when referring to specific groups.
3. Avoid labeling people. When referring to someone who has a disability or illness then use the terminology “person with a disability”, “person with HIV”, “person with a mental
illness”.
4. When referring to the age of participants the following terminology is appropriate. For children up to high school age use “boys and girls”; for adolescents use “young men and
young women”; for over 18s use “men and women”; and when referring to people who are
older do not use the “elderly” but “older person”.
5. Do not contrast one group of participants with another group called “normal”. Instead write “we compared people with dementia to people without dementia”.
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Problematic Example Preferred Example
Sexual preference Sexual orientation
The sample consisted of 200 adolescent
homosexuals.
The sample consisted of 100 gay male and
100 lesbian adolescents.
Disabled person Person with a disability; person who is
differently abled
Mentally ill person Person with a mental illness or psychiatric
disability
Schizophrenics People who have schizophrenia
Epileptics Individuals with epilepsy
Confined to a wheelchair Uses a wheelchair
Cripple Person with a limp
Crazy, paranoid Person with symptoms of mental illness
Forming the plural The plural of many words in English is formed simply by adding “s”. This simple rule should be
applied when forming the plural of abbreviations and numerals. For example, GPs as the plural
of GP, the 1960s to indicate the years of that decade. Do not use the apostrophe for this purpose.
Note that some words of Latin origin form the plural in a different way. For example, datum, the
singular, gives rise to the plural data; criterion, the singular, has criteria as the plural;
phenomenon, the singular, has phenomena as the plural. For example:
The data were analysed using the t test.
The several phenomena are termed parameters of habituation.
The criterion adopted was one trial without error.
Other criteria have been used by researchers elsewhere.
Page numbering The page numbers of your own work are always placed in the TOP RIGHT CORNER of your
essay or assignment in the header.
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Punctuation Punctuation is about where to pause (comma, semi-colon, and colon), stop (full stop and
question mark) or take a detour (dashes, brackets). To read about how to use punctuation
correctly please see page 78 in the APA Publication Manual (5th edition).
Use of “and” or “&” when referencing Use an ampersand, “&”, when listing authors in your reference list and in-text citations. Use
“and” when writing about an author’s point in the body of your report or essay. See examples
below:
EXAMPLE 1
They have also been invaluable for understanding and treating clients that were
previously thought to be untreatable (Westen & Cohen, 1993).
EXAMPLE 2
Westen and Cohen (1993) pointed out that empirical evidence linking personality
disorders with problems in the child’s developmental stages is weak or unsupported.
Use of numbers Generally, numbers less than and including ten are expressed as words (e.g. “five participants”),
and numbers above ten are expressed as numerics (e.g., “100 participants”).
Marking Criteria Prior to starting your written work read through the marking criteria for your assessment item.
Be clear about what you need to cover and see if there are any weightings on the sections. When
you finish your work make sure to check through the criteria again ensuring you have addressed
all major points. If you are uncertain at all about criteria please check with the convenor.
Marker’s Shorthand
When your work is marked by the tutors they will use marking abbreviations. These cover the
most common errors made by students. A copy of the abbreviations is on the next page. When
you receive your work back from tutors please make sure to check your tutor’s comments.
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MARKER’S SHORTHAND
The following abbreviations have been used with respect to marking your work.
AA List references in alphabetical order (Barnes, 1992; Crocker & Smith, 1945)
APA This is not APA style – see APA handbook for correct format
CA Good critical analysis
CW Clear and concise writing
DEF You need to define specialist terms to the reader
DS Double space your writing
FE Further explanation is needed here.
INQ Indent quote if more than 40 words
GP Good point raised
IP Indent paragraph
LS Long sentence and could be better rewritten as two or more short sentences
MW Missing words
NA Do not use contractions of words eg. “don’t” – write them in full – “do not”
NAL Non-academic language e.g jargon, slang, dramatic language or colloquialism
NGAP No gap between paragraphs
NP New paragraph
NS Not a proper sentence
OT Off topic in answering the question
PL On the edge of plagiarism. Ensure adequate acknowledgement is made to sources. If it is not your words
you need to reference it.
PN Page number needed for direct quote
PR Needs serious proof-reading
PS Paragraph structure needs attention
REF Reference needed to acknowledge the source of this information or idea
REP Repetition of words / ideas
SP Spelling mistake
SS Sentence structure needs improvement
TLP Too long for a paragraph
TSP Too short for a paragraph.
YB Need year of publication in brackets after this.
ADDITIONAL LAB REPORT CODES
DV What are your dependent variables? HYP Need to state specific hypothesis
IV What are your independent variables? OP Need to operationalise your constructs
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More Tips for Writing in Psychology
Use 12 point Times New Roman font.
Type double-spaced on one side only of A4 bond paper.
Leave a uniform margin of 25mm all around.
Fasten all pages firmly (e.g., staple) in the left-hand corner.
Check spelling and punctuation before submission.
Do not submit work in plastic covers.
Do not use contractions; i.e., don’t, can’t, shouldn’t – write them in full, e.g., do not.
When using the possessive form of “its” (e.g., the computer should be left on its desk) do not use an apostrophe. The apostrophe form of “it’s” is only used for the contraction of
“it is” (which is not to be used in academic writing – see above).
Do not use clichés such as “solid as a rock” or colloquial expressions such as “figured out” or “lab report”.
Do not use sexist language (he or she). To be safer use the plural form (they).
If using the first person do not use the royal plural (“we”) when in fact you mean “I”.
Generally, use of an ‘active voice’ rather than a ‘passive voice’ is preferred i.e., “We conducted the survey in a controlled setting” rather than “The survey was conducted in a
controlled setting”. The exception here, however, is when you want the focus on the
object or recipient of the action over the actor. For example, “The camera was placed
behind the one-way glass’ emphasises the placement of the camera, not who placed it
there.
Apostrophes should be used to show possession. For example, “A participant’s score was …” “All of the participants’ scores were …”
Assume the reader knows little about the issues being discussed. Define all important terms.
Avoid using jargon. For example, “Like many clients with PDs, Mr S also has a comorbid Axis 1 problem”. Be specific and clear, for example, “While Mr S’s primary
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diagnosis is paranoid personality disorder, the evidence also suggests a comorbid mood
disorder”.
Use short words and short sentences as they are easier to comprehend.
Check your grammar. Make sure your sentences have verbs and that the verb agrees in number with the subject. For more information on using correct grammar, refer to the
APA Publication Manual (6 th
Ed).
Write a draft of your work and revise it several times before handing it in. Proof read your work to ensure that your grammar, spelling, structure, referencing, and logic are all
in order. Read your work aloud to yourself. Try asking someone else to read it and give
feedback on how to improve it. The effort taken to do this will pay off for you.
Do not exceed the word or page limit. These have been set for a reason. In order not to be penalised make sure to remain within 10% over or under the word limit. For example,
if it is a 2,000 word essay you need to write between 1,800 to 2,200 words.
The word count does not include title page, reference list, or appendices but does generally include all other sections of the report or essay (check with your tutor or
convenor for course specific guidelines).
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Submitting your
assignment
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Submitting your assignment
Assignments need to be submitted by the due date and time according to the course convener's
instructions. Check the course profile for submission instructions for each assignment.
Assignments received by fax or e-mail will NOT be accepted. Students must be able to produce
a copy of all work submitted if so requested. Please, oh please DO NOT RELY UPON
MERELY SAVING YOUR WORK ON A COMPUTER - HAVE A COPY ON DISK/USB, AS
WELL AS A PRINTED OUT COPY OF YOUR WORK.
Hard copy submission All written assignments should include a cover sheet (available from appropriate assignment
submission locations, or from; https://intranet.secure.griffith.edu.au/student/exams-
assessment/submitting-assignments.) with the title of the assignment, student name,
identification number, course code, tutor's name, and day and time of the student's usual tutorial
class. Assignment submission information will be recorded in a database.
Submission locations for the Mt Gravatt campus:
A. The Lending Desk of the Library. A designated area has been set aside inside the Library for
students to complete their assignment coversheets and place in the Assignment Submission
Box provided, or hand to Library Lending Staff if they require an assignment receipt (highly
recommended!).
B. If the Library is closed, assignments can still be submitted at the 24 hour assignment box
outside Student Administration.
- Both the library submission box and the student administration submission boxes are cleared
hourly between 9am and 5pm, Monday to Friday.
- Assignments submitted after 5pm are date stamped 9am the subsequent working day.
You are more than welcome to submit your assignment at any of the Griffith
University submission points if this is easier for you personally (i.e., your
closest campus is the Logan campus rather than Mt Gravatt). Please check
your campus details for submission locations.
Electronic submission Some courses may enable you to submit your assignment electronically. When
courses allow you to submit your assignment electronically then you can choose between
submitting a hard copy or an electronic copy. For submission instructions, check out the
‘Assignment’ section of the specific course on Learning@Griffith – along with
information about the essay, there will also be a link for submitting your assignment.
HOWEVER, please don’t get confused between submitting an electronic copy and
submitting your assignment to Safe Assign – these are two separate things. Please don’t
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wait until the last hour to submit your assignment electronically just in case everyone else
waits until the last hour and the system gets flooded with submissions.
*Remember* Some courses will allow for hard copy submission OR an electronic copy submission.
Some courses will also require a Turnitin or Safe Assign Submission
in addition to one of the options above.
Check the course outline for specific instructions for each course.
Check out the “Assessment” section
for electronic submission
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Turnitin and Safe Assign The following information is taken from Information Services handout on SafeAssign.
Turnitin and SafeAssign are tools within Learning@Griffith that enable you to submit electronic
versions of your assignments via the internet, and generate a text-matching report. Griffith
University is introducing text-matching software into the assignment submission process in order
to achieve the following:
Allowing students to check their assignments to ensure correct referencing of quotes and ideas, and thus develop skills in correct academic writing;
Allowing academic staff to better identify students who may need further assistance with their academic writing skills and in developing their own ideas in written assignments.
How Turnitin and SafeAssign work
Turnitin and SafeAssign take the assignments you submit, and checks for text matches against
the following sources:
Internet
ProQuest ABI/Inform database
Institutional document archives containing all papers submitted to SafeAssign by staff and students at Griffith University
Global Reference Database, a database shared across all the institutions that use SafeAssign who have chosen to give their students this option. Each student decides whether they
wish to submit each assignment to the Global Reference Database – a check box is
available at final submission time. Choosing to submit a file to the Global Reference
Database means your assignment is stored by SafeAssign and used to check for text
matches in other assignments submitted by students at other universities and institutions
around the world.
After you submit your file, SafeAssign will return a report showing which, if any, text in the
submitted document matches text from other documents. Please note that SafeAssign cannot tell
you if text that you have quoted in your assignment is correctly cited, or if your reference list is
correct. It will simply highlight those sections of text that have been found in other sources, and
assign an overall percentage score. The average score will vary depending on the topic of the
assignment; for example, in one course the average range might be 10%-30%, and in another
course, 20%-40%. (You do not need to aim for a score of 0%.) You can learn about interpreting
this report by referring to the tipsheet “Accessing and Interpreting SafeAssign Reports For
Students”, which is available online from: http://intranet.griffith.edu.au/blended-learning-support
How to submit your assignment through Safe Assign
A link for each assignment will be set up in your Learning@Griffith course site. To submit your
assignment, click this link, and follow the prompts to attach the file and submit. Tips on
preventing technical issues are at the end of this tipsheet – please refer to this information before
you submit. You will also have access to a draft submission point: this allows you to submit your
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assignment as a draft. Please note that draft submissions are stored in Learning@Griffith (but
not in SafeAssign), and can be viewed by your course convenor.
Please note that if you are submitting your file whilst on campus, or connected using
Griffith@Home or VLink VPN, you must be logged into NetCheck to submit your assignment.
Your file will need to be one of the following file types:
• Microsoft Word document: .doc*
• Rich Text Format: .rtf
• HTML: .htm or .html
• Text: .txt
• PDF: .pdf
* Please note that if you are using Microsoft Office 2007, documents saved in .docx format
cannot be submitted via SafeAssign. You need to open the document in Microsoft Word, choose
'Save As', then select Word 97-2003 Document in the' Save as type' dropdown list to save your
file in a format that you can submit.
*Remember* Please remember to include your title page at the front of your assignment (i.e., see “Title Page” section on page 3)
Important information about SafeAssign and Endnote
If you are using Endnote to manage citations in your essays, it is important to note that
SafeAssign does not support Endnote. When you view or print a document in Word, the field
codes for the Endnote citation are properly converted into the expected formatting because you
have the Endnote plug-in installed. However, SafeAssign cannot interpret the field codes for the
Endnote citation. So when the submitted Word paper is converted into text for processing by
SafeAssign the Endnote citation field codes cannot be interpreted - they are treated as plain text.
In plain text, the field codes look like {ADDIN EN.CITE ... } with all the citation information
inside the curly brackets. Students using Endnote should save the final version of their
assignment for submission without the field codes. To do this, go to the Tools menu and select
Endnote X1-> Remove field codes. We recommend that you keep a backup copy of your file
with the field codes included, as once you have removed the field codes, you cannot reconnect
them.
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Submitting your Assignment (Turnitin)
1. Log into Learning@Griffith using your student ID (s-number) and password. 2. Navigate to the course where you need to submit your assignment (e.g., the 1008PSY
section).
3. Your course convenor or tutor will advise you where in the course the link to submit your assignments is located but typically it is under the “Assignment” section. Navigate to
this location. If you cannot find the link, please contact your course convenor.
4. Click the View Assignment link which appears under the name of the assignment that you are submitting. Links to both draft (if available) and final submission points will be
available.
5. Click on ‘Submit’
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6. The submission type will be ‘file upload’. 7. Provide a title for your submission. 8. Click ‘choose file’ to browse for the file 9. Click Submit.
You can then return to the submissions inbox screen, and verify that your assignment was
attached successfully. We recommend you open the file and look it over, and if you notice any
problems, contact your course convenor.
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Tips on successful file submission If you are working on campus or using Griffith@Home or logged into Griffith via VPN (VLink),
please confirm that you are logged into NetCheck. It is best to do this before you begin. If you
encounter an error during submission that is related to the internet connection, open a new
browser window and visit:
http://www.griffith.edu.au/netcheck
If the screen indicates that you are not logged in to NetCheck, login now. A file in the process of
being submitted in another window should then be processed successfully.
To minimise the risk of problems with your file submission
Ensure that your file/s work correctly before you attempt to submit. Open your files and check everything looks OK before you begin.
Make sure your computer is attaching the file extension to the filename, and that the file extension is correct (.doc, .pdf). SafeAssign does not support .docx files. If you are using
Word 2007 make sure you save your file in .doc format. Turnitin does support .docx files.
If you are using Endnote, save your file without the field codes.
Consider whether your home internet connection is fast enough to submit the assignment for you. For example, if you have dialup Internet at home, and an assignment file larger than
1MB, you should try to use a computer with a faster Internet connection, to minimise
issues with timeouts.
Make sure you are using a supported browser. Internet Explorer, Firefox and Safari are best. (If you are using a non-standard browser, we cannot guarantee that the assignment
submission tool will function correctly.)
Help and Support
If you experience any technical difficulties:
Notify your course convenor. Even if they are unable to assist they should be made aware of any issues that may affect the submission of your assignment.
For urgent queries, you can contact InfoServices by phone: Brisbane +61 (07) 373 55 555. Please let the staff on the phone know that you are having trouble with assignment
submission via SafeAssign in Learning@Griffith. InfoServices can escalate your query
to appropriate higher level support if necessary.
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Plagiarism
Academic Integrity student tutorial available on Learning@Griffith
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Plagiarism
Deliberate plagiarism is knowingly presenting the work or property of another person as if
it were one's own. It is the most serious offence that can be committed in the academic
world.
Examples of plagiarism include:
a. Verbatim copying: word for word copying of sentences or paragraphs from one or more
sources which are the work or data of other persons (including books, articles, thesis,
unpublished works, working papers, seminar and conference papers, internal reports,
lecture notes or tapes) without clearly identifying their origin by appropriate referencing;
b. Incorrect/ inadequate acknowledgement: closely paraphrasing sentences or paragraphs
from one or more sources without appropriate acknowledgment in the form of a reference
to the original work or works. This is the most common form of unintentional
plagiarism.
c. Ghost writing: submitting work which has been produced by someone else on the
student's behalf as if it were the work of the student;
d. Collusion: submitting work which has been wholly or partially derived from another
student's work with his/her knowledge.
e. Purloining or appropriation: Copying material from another’s assignment without his/her
knowledge.
Why do some students plagiarise?
Kilsby and Alexander (nd, p.1) provide an enlightening summary of the different motivations
behind plagiarism, please see their fact sheet (available on the GU website for more details):
What motivates students to plagiarise?
Academics indicate that they perceive the reasons for intentional plagiarism to
include: laziness, greed for grades, deceitfulness, competitiveness, lack of time
and apathy. However the list of reasons given by students themselves is more
extensive and includes: helping a friend, extenuating circumstances, peer
pressure, fear of failure, “everybody does it”, laziness and cost of education
(Franklin-Stokes & Newstead, 1995).
Further research by Park (2003) into this area suggests the following reasons
for plagiarising, amongst Australian students:
1. Efficiency gain – a better grade in less time;
2. Time management issues;
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3. Students’ personal values that may be influenced by social pressure – ‘it’s
okay to plagiarise’;
4. Defiance – a deliberate sign of dissent and/or objection to assessment tasks;
5. Negative student attitudes towards teachers and/or assessment tasks;
6. Denial or neutralisation of plagiarism-related behaviour;
7. Temptation and opportunity via the digitisation of information; and
8. Lack of deterrence –low chance of being caught/effectively punished.
What influences unintentional plagiarism?
In a DEST funded project (2002), James outlines factors that influenced
unintentional plagiarism:
Students’ lack of understanding of the concept of plagiarism and what it means
in practice;
Students’ lack of understanding of citation and referencing conventions;
Students’ limited skill base in academic skills (such as critical analysis, constructing an argument and paraphrasing) and in learning skills
(such as time, group, workload and stress management); and
Student misunderstanding and ignorance about why and how they should avoid plagiarism.
Cultural factors that may also influence either intentional or unintentional
plagiarism include:
A norm of learning by rote where it is acceptable not to acknowledge the source;
Inadequate skills in paraphrasing because English is the student’s second language;
Belonging to a ‘culture of pleasing’, so desiring to submit first class work to a respected teacher (Mathews, 2007); and
Fear of bringing dishonour to one’s family by failing.
University penalties for plagiarism
Penalties for plagiarism will be enforced. Please refer to the school website for further details.
http://www.griffith.edu.au/academic-integrity
Avoiding plagiarism To avoid accusations of plagiarism:
take notes carefully when conducting your background readings for assignments.
Make sure to distinguish your direct quotes from paraphrases
In your assignment work, try to avoid quoting more than needed
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Use direct quotations only when the author’s statement adds to your argument and when their wording is difficult to replace
Avoid giving your colleagues copies of your assignment drafts – discuss your approach to your assignment in your study groups but try to get someone who is not studying
the same subject as you to proof read your assignment.
Below is an example of what plagiarism looks like. It will help you see the difference
between acceptable paraphrasing and plagiarism.
Original Text
If the existence of a signing ape was unsettling for linguists, it was also startling news for animal
behaviourists (Davis, 1993; p. 26).
Plagiarised Text
a) If the existence of a signing ape was unsettling for linguists, it was also startling news for animal behaviourists.
Note: This is plagiarism as the writer has used exactly the same words and not acknowledged the
source. To use this text word for word you have to acknowledge the source by placing in
brackets the author’s name, date of publication, and page number. You would also need to put it
in double quotation marks (“ ”). If you listed the author and the date but failed to identify it as a
quote this would still be plagiarism.
b) The existence of a signing ape unsettled linguists and was also startling news for animal behaviourists (Davis, 1993; p. 26).
Note: Even though the writer has acknowledged the source and changed one or two words, they
have not used quotation marks around the direct quotes “the existence of a signing ape” and “was
also startling news for animal behaviourists”. Therefore it is still plagiarism.
No Plagiarism
a) According to Davis (1993), linguists and animal behaviourists were unprepared for the news that a chimp could communicate with its trainers through sign language.
Note: This is paraphrasing of the original text. The words used are different to the original and
the sentence structure is changed. No page number is needed in this case.
If you do not want to be accused of plagiarism make sure to reference all quotations and
paraphrases, any ideas that are not your own, and facts that are not general knowledge.
Other great resources: Academic integrity student tutorial available through Learning@Griffith
– under the “students” tab
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References cited in this guide
American Psychological Association. (2010). Publication manual (6th ed.). Washington, DC:
Author. (Library reference: BF76.7 .P83 2010)
Germov, J. (1996). Get great marks for your essays. St Leonards, NSW: Allen & Unwin.
Kilsby, E. & Alexander H. (n.d.). Good practice on issues of academic integrity – plagiarism.
[Brochure] Brisbane, Australia: Griffith Institute for Higher Education. Retrieved from
http://www.griffith.edu.au/gihe/teaching-learning-curriculum/resources/GPG-IAI.pdf
Learning Centre (1994). Common terms used in essay questions. [Brochure]. Sydney,
Australia: University of New South Wales.
Useful books on writing for psychology
American Psychological Association. (2010). Publication manual of the American
Psychological Association. Washington, DC: Author. (Library reference: BF76.7 .P83 2010)
Beech, J. (2009). How to write in psychology: A student guide. Malden, MA: Oxford: Wiley-
Blackwell Publishing. (Library reference: BF76.8 .B425 2009)
Perrin, R. (2009). Pocket guide to APA style. Boston, Wadsworth, Cengage Learning. (Library
reference: BF76.7 .P47 2009)
Szuchman, L. T. (2011). Writing with style: APA style made easy. Belmont, CA: Wadsworth.
(Library reference: BF76.8 .S98 2011)
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Chapter-by-Chapter changes from APA 5 to APA 6 Taken from http://www.apastyle.org/manual/whats-new.aspx with additions added
Chapter 1: Writing for the Behavioural and Social Sciences
Ethics discussion significantly expanded:
New section on data retention and sharing
New section on self-plagiarism
Expanded section on duplicate and piecemeal publication
New discussion of determining authorship, focusing on student contributions
Expanded section, “Protecting Rights of Research Participants” additional expanded guidance on assuring confidentiality
Expanded guidance on conflict of interest
New “planning for compliance” checklist
Chapter 2: Manuscript Structure and Content
New section on uniform standards for reporting research.
Journal article reporting standards incorporated into new discussions of abstract, methods, statistical results, and discussion.
Three modules added with standards for describing experimental manipulations.
Flow chart added to describe how subjects move through study.
New section on meta-analyses.
New section on supplemental material.
New sample papers featured that illustrate key new rules of APA style.
Chapter 3: Writing Clearly and Concisely
New heading structure established to simplify retrieval and ease reading comprehension.
Fully revised guidelines on reducing bias in language.
New section on historical and interpretive inaccuracies in language.
Use of “subjects” vs. “participants” revisited, with “subjects” fully accepted for use.
Gender—guidelines for avoiding bias updated (e.g., question the use of such constructions as “opposite” sex).
Definitions and preferred usage for terms “transsexual” and “transgender” updated.
Race—avoid language that reifies race, avoid use of “minority” for “non-White”.
New sentence added for those of Middle Eastern descent.
Chapter 4: The Mechanics of Style
Punctuation—return to two spaces after the period at the end of the sentence recommended for ease of reading comprehension.
Numbers—requirement to use numerals for numbers below 10 grouped with those above 10 has been dropped.
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Numerals vs. words—exception has been added for using words when discussing approximations of days and months (about five days).
Decimal fractions—new guidelines for reporting of p values to two or three decimal places. (However, p values less than p<.001 should be reported as p<.001).
Statistics in text—new guideline added to include not only statistics but also associated effect sizes and confidence intervals.
Form for reporting confidence intervals delineated.
Chapter 5: Displaying Results
Expanded general guidance on determining the purpose of data displays and designing to achieve that purpose.
New section on confidence intervals in tables—guidance on reporting results of statistical significance in tables.
All new tables, focused on kinds of data being displayed.
New table examples added (hierarchical multiple regression, multilevel model); ANOVA table removed.
New section on principles of figure use and construction.
New section on presenting electrophysiological, radiological, and biological data.
New cautions about ethical ramifications of manipulating data in photographic images.
Chapter 6: Crediting Sources
Chapter now groups rules for quoting and guidance on getting permissions with standards for citation.
Citations—new passage added on what to cite and recommended level of citation.
New guidance on in-text citations of material quoted from electronic sources with no page numbers.
Reference list
New discussion on citing the archival version or version of record.
New expanded information on electronic sources and locator information, with an emphasis on the DOI. No retrieval date required.
New guidance on what to include for publication information, with focus on electronic sources.
Chapter 7: Reference Examples
All new reference examples—electronic formats incorporated with print formats for each form.
Examples drawn from wider range of journals in social and behavioral sciences.
New examples for new media, including data sets and software, internet message boards, archival documents and collections, wikis, and podcasts.
When citing editions of work, use a small ‘e’ (e.g., 2nd ed.)
No longer can leave out the state/ country for famous publishing locations. Write the abbreviation for the state if US or write the country if outside of US (e.g., London, England)