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(solution) PSYC 355 SPSS HOMEWORK 4 INSTRUCTIONS - TWO-WAY ANOVA


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PSYC 355 SPSS HOMEWORK 4 INSTRUCTIONS - TWO-WAY ANOVA (40

 

POINTS)

 

Part One: Note: For the two-way ANOVA, you will be expected to create a line graph as

 

covered in the SPSS tutorial in the Course Content (and not a boxplot as in the textbook).

 

This applies to future cumulative questions as well.

 

Green & Salkind: Lesson 26 end of chapter exercises. Read the research scenarios in the

 

text, then follow the directions below as some questions have been altered.

 

Open Lesson 26 Exercise File 1 found in Blackboard Course content (under Syllabus and

 

Assignment Instructions?Assignment Instructions?SPSS Homework4?SPSS Homework 4

 

Files?Mod4_Lesson 26 Exercise File 1).

 

This data set pertains to reinforcers and reinforcement schedules on arithmetic test scores for

 

second graders, as described in Green and Salkind end-of-chapter Exercise 1 in Lesson 26.

 

1. Conduct a two-way ANOVA and paste the output here, including Tukey?s post hoc

 

test for any independent variables with more than two groups/levels.

 

2. Answer the following questions:

 

a. F value for the reinforcer type main effect

 

b. Effect size for the interaction effect

 

c. P value for the schedule main effect

 

3. Produce a line graph instead of a boxplot for this problem. Follow directions in

 

course SPSS tutorial for setting up a line graph.

 

Open Lesson 26 Exercise File 2 found in Blackboard Course content (under Syllabus and

 

Assignment Instructions?Assignment Instructions?SPSS Homework 4?SPSS Homework 4

 

Files?Mod4_Lesson 26 Exercise File 2).

 

This data set pertains to the amount of play time fathers spend with children as described in the

 

second end-of-chapter scenario in Lesson 26 of Green and Salkind.

 

4. Conduct a two-way ANOVA and paste the output here, including Tukey?s post hoc test

 

for any independent variables with more than two groups/levels.

 

5. Write an APA-style Results section based on your analyses. All homework ?Results

 

sections? should follow the example given in the SPSS tutorials and the Course Content

 

document ?Writing Results of Statistical Tests in APA Format.? Remember to include a

 

decision about the null hypothesis.

 

6. Produce a line graph instead of a boxplot for this problem, and for 2-way ANOVA?s in

 

general in the course. Follow directions in course SPSS tutorial for setting up a line

 

graph.

 

Part Two:

 

1. Research scenario: A group of clinical psychologists sets up a treatment study to look at the

 

effects of treatment type and treatment setting (community clinic or university clinic) on

 

symptom severity in a sample of patients with diagnosed Major Depressive Disorder. They

 

Page 1 of 3 PSYC 355 recruit 12 participants from each type of clinic, and divide them further into two groups, one

 

of which receives cognitive-behavioral therapy (CBT) and one of which receives

 

psychodynamic (PD) therapy. The psychologists measure depressive symptomology using

 

the Beck Depression Inventory (Beck et al., 1961), and scores can range from 0 to 62. Their

 

results are in the table below. Conduct a two-way ANOVA to determine whether treatment

 

type and/or treatment setting have an effect on the severity of depressive symptoms. CBT PD Community Clinic

 

36

 

32

 

19

 

25

 

27

 

24

 

41

 

38

 

12

 

46 University Clinic

 

31

 

12

 

27

 

20

 

29

 

42

 

21

 

37

 

53

 

19 a. Paste SPSS output.

 

b. Write an APA-style Results section based on your analyses. All homework ?Results

 

sections? should follow the example given in the SPSS tutorials and the Course Content

 

document ?Writing Results of Statistical Tests in APA Format.? Remember to include a

 

decision about the null hypothesis. For the two-way ANOVA, be sure to include

 

statistical statements concerning the F ratios and p values for both main effects and the

 

interaction, and decisions about the null hypotheses for all 3 of these effects.

 

c. Based on group means, clients at which clinic type have the lowest mean BDI score,

 

regardless of treatment type?

 

d. Is there a significant interaction effect?

 

Part Three: Cumulative Homework: Choose the correct method from tests learned in

 

previous modules.

 

1. Research scenario: An investigator in child development research is studying the

 

development of object permanence ? the understanding that an object still exists even if its

 

out of sight. She tests three groups of infants ? ten who are 9 months old, 8 who are 12

 

months old, and 10 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 looks for the object when it?s 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 Page 2 of 3 PSYC 355 permanence? Choose the correct test to analyze this question, set up the SPSS file, and run

 

the analysis. Follow the directions under the table below.

 

9 Months 8, 3, 4, 6, 5, 4, 9, 2, 0, 1 12 Months 10, 5, 6, 7, 6, 5, 10, 3 15 Months 10, 8, 9, 9, 8, 7, 9, 6, 6, 8 a. Paste appropriate SPSS output.

 

b. Paste appropriate SPSS graph.

 

c. Write an APA-style results section describing the outcome. All

 

homework ?Results sections? should follow the example given in

 

the SPSS tutorial and the Course Content document ?Writing

 

Results of Statistical Tests in APA Format.?

 

Submit this assignment by 11:59 p.m. (ET) on Monday of Module/Week 4. Page 3 of 3

 


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