PSYC 355

SPSS HOMEWORK: ONE-WAY ANOVA ASSIGNMENT INSTRUCTIONS

OVERVIEW

This assignment is designed to increase your statistical literacy and proficiency in conducting

and interpreting the one-way ANOVA. You will be completing two one-way ANOVA analyses

in SPSS, using data that are related to specific research scenarios in the behavioral sciences, such

as psychology, social work, and counseling. Behind the scenes knowledge of how this test is

conducted is fundamental to being able to understand and apply research in your related field to

your practice. Additionally, SPSS skills are professionally valuable, as it is one of the most

commonly used statistical software packages in behavioral science settings, both academic and

professional.

INSTRUCTIONS

This assignment includes two problem sets that contain research scenarios and related

questions.

For each scenario, you will run an analysis in SPSS. The required product will include

the SPSS output, an APA-style Results section describing the results, and the appropriate

graph inserted as a Figure in APA style.

For all problems, interpret results based on an alpha level of = .05.

Please review the Watch: SPSS Homework Tutorial: The One-way ANOVA for directions on

how to run the statistical test, as well as the Watch: Results Sections for the One-way ANOVA

in APA Style, which includes a template for completing the APA-style Results sections for the

one-way ANOVA. The scenarios begin on the next page.

First-generation

immigrants

Second-

generation

immigrants

Non-immigrants

29

39

40

36

37

28

19

10

17

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Problem Set 1: The One-way ANOVA

Research Scenario: As part of a new prevention program, a clinical psychologist wants to

see whether feelings of alienation differ as a function of immigration status in a local high

school. She divides volunteer students into three categories: first-generation immigrants,

second-generation immigrants, and non-immigrants. She then administers an instrument

assessing feelings of alienation, where higher scores indicate stronger feelings of alienation

from peers, adults, and society in general. Is there a difference in alienation scores among

these three groups?

Using this table, enter the data into a new SPSS data file and run a one-way ANOVA to

test whether there is a difference in feelings of alienation among the three groups. Create

a boxplot to show the difference between the groups. Follow the directions below the

table to complete the homework.

PSYC 355

37

36

23

25

18

36

25

28

8

19

28

16

1. Paste SPSS output. (10 pts)

2. Write an APA-style Results section based on your analysis. Include your boxplot as an

APA-style Figure as demonstrated in the APA writing presentation. (Results = 12 pts;

Figure = 8 pts)

The one-way ANOVA was conducted to determine the eect of alienaon of rst-generaon, second

generaon, and non-immigrants on feeling from adults, teen, and society in general. The gures that

show what eects it can have on dierent types of generaons. The test revealed a signicant dierence

between each group of generaons we there is a signicant change in the results showing, so we will

reject the null hypothesis.

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PSYC 355

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Problem Set 2: The One-way ANOVA

Research Scenario: Twenty-four male adolescents who have been diagnosed with conduct

disorder with a callous-unemotional presentation (CD-CU) are randomly assigned to one of 3

group therapy conditions: cognitive behavioral therapy only (CBT), behavioral parent training

only (PT), and a combination of the two (CBT + PT). Following six months of therapy, the

participants are assessed using the Inventory of Callous Unemotional Traits (ICU; Frick,

2004). On this instrument, higher scores indicate higher levels of conduct problems and

callous-unemotional traits. The scores for each group are shown in the table below.

Using this table, enter the data into a new SPSS data file and run a one-way ANOVA to

test whether there is a difference in ICU scores among the three groups. Create a

boxplot to show the difference between the groups. Follow the directions below the table

to complete the homework.

PSYC 355

CBT PT CBT + PT

30

25

26

31

29

24

32

35

29

21

28

32

25

27

29

30

19

19

24

30

26

23

27

28

1. Paste SPSS output. (10 pts)

2. Write an APA-style Results section based on your analysis. Include your boxplot as an

APA-style Figure as demonstrated in the APA writing presentation. (Results = 12 pts;

Figure = 8 pts)

A One way ANOVA was conducted to determine the effects of ICU scores on

male adolescents for CBT, PT, and CBT+PT unemotional conducts are assessed using

the Inventory of Callous Unemotional Traits. With the results shown I was able to see

that there is no significant change resulting that I will not reject the null hypothesis.

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PSYC 355

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