SPSS H : O ANOVA A IOMEWORK NE-WAY SSIGNMENT NSTRUCTIONS
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. You will also be completing one Cumulative
Knowledge Question that will use an analysis learned in a previous week. 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 three 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 each scenario, you will create a new SPSS data file with the data from the problem
scenario. ALL variable names in your SPSS data files must include your initials, so that
they show up in your SPSS output and graph For example, for someone with the initials .
ABC creating a variable of memory scores, the variable could be named
“ABC_mem_scores” or “Mem_Scores_ABC”, etc.
·For all problems, interpret results based on an alpha level of a = . .05
Please review the in this module 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.
CBT Paxil ® CBT + Paxil ®
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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, with figure number and title, as demonstrated in the Results Section
presentation. (Results = 12 pts; Figure = 8 pts)
Results
A one-way ANOVA was conducted to determine the effect of the psychosocial and
pharmaceutical treatments (cognitive behavioral therapy (CBT), Paxil, and CBT + Paxil) on
participants who have been diagnosed with Social Anxiety Disorder (SAD) as measured on an
inventory where higher scores indicate higher levels of social anxiety. Figure 1 illustrates the
SADS scores of the three groups. The results indicate
Problem Set 1: The One-way ANOVA
Research Scenario: A group of clinical psychologists conducts a randomized clinical trial
examining psychosocial and pharmaceutical treatments, alone or in combination, for Social
Anxiety Disorder (SAD). Participants who have been diagnosed with SAD are randomly
assigned to one of three treatment groups: cognitive behavioral therapy (CBT); Paxil ® (a
common SSRI prescribed to patients with SAD); and CBT + Paxil ®. The participants are
assessed after 6 months of treatment using the Social Avoidance and Distress Scale (SADS;
Watson and Friend, 1969), where higher scores indicate higher levels of social anxiety. Their
SADS scores are 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 in SADS scores between the three treatments. difference Remember
to put your initials within any and all variable names. Create a boxplot to show the
difference between the groups. Follow the directions below the table to complete the
homework.
Figure 1
SADS Scores for Participants in Three Different Treatment Groups
9 months 12 months 15 months
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1. Paste SPSS output. (10 pts)
Problem Set 2: The One-way ANOVA
Research Scenario: A developmental psychologist is studying the progression of object
permanence (the understanding that an object still exists even if it’s out of sight). She tests
three groups of infants – ten who are 9 months old, eight who are 12 months old, and ten who
are 15 months old. She presents each of the infants with 10 trials. On each trial, a toy is first
shown to the child and then covered with a piece of cloth. The infant demonstrates object
permanence if he or she continues to look for the object while it is still covered. Each infant is
given a score for the number of trials (out of 10) on which he or she shows object permanence.
Is there a significant difference between the groups on demonstrations of object permanence?
Using this table, enter the data into a new SPSS data file and run a one-way ANOVA to
test whether there is a in object permanence scores among the three age difference
groups. Create a boxplot Remember to put your initials within any and all variable names.
to show the difference between the groups. Follow the directions below the table to
complete the homework.
2. Write an APA-style Results section based on your analysis. Include your boxplot as an
APA-style Figure, with figure number and title, as demonstrated in the Results Section
presentation. (Results = 12 pts; Figure = 8 pts)
Results
A one-way ANOVA was conducted to determine the difference in object permanence
scores among infants (9 months old, 12 months old, and 15 months old) as measured on an
inventory where each infant is given a score for the number of trial out of 10 that they show
object permanence for. Figure 1 illustrates the trials scores of the three groups. The results
indicate
Figure 1
Trials Score for Object Permanence in Infants of Three Age Ranges
Minutes Ex./Wk.
Before Program
Minutes Ex./Wk.
After Program
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90
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160
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120
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170
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70
Problem Set 3: Cumulative Knowledge Question
Research Scenario: Research Scenario: A sports psychologist is studying the efficacy of a
new public school health program on the number of minutes 10 graders exercise per week.
th
She surveys a sample of eight 10 graders before the program begins and records the number of
th
minutes they report exercising per week. After two months in the program, the students are
surveyed again. The data are listed in the table below.
Using this table, enter the data into a new SPSS data file. Choose and run the correct
analysis (it will be one learned in a previous module) to determine whether the new public
health program significantly the number of minutes exercised for 10 graders.
increases th
Remember to put your initials within any and all variable names. Choose and create the
correct graph that corresponds with this analysis. Follow the directions below the table to
complete this part.
1. Paste SPSS output. (10 pts)
2. Write an APA-style Results section based on your analysis. Include your graph as an
APA-style Figure, with figure number and title, as demonstrated in the Results Section
presentation. (Results = 12 pts; Figure = 8 pts)
Results
Figure 1
