Respond to the Exercises on Green and Salkind

Part 1:

Green & Salkind: Lesson 25, Exercises 1–3 This is the data –>Module 3(1).zip

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The following helpful tips are numbered to correspond with the exercise number to which they refer (a dash indicates that no tips are needed):

1.  Use Tukey’s test as the post hoc test for ANOVAs in PSYC 355. Be sure to check this box when you run analyses. For letters a–d, instead of identifying these values on your output, as the text states, write them into your Word file as written answers for #1 a, b, c, and d. (2 pts for output and 2 pts each for a–d)

2.  ———- (3 pts)

3.  Remember to put your dependent variable in the “variable” box, and your independent, or grouping, variables in the “category axis” box. (3 pts)

Part 2:

1. Sixth grade students who struggle with similar social difficulties at school and home are randomly assigned to 1 of 3 group therapy conditions in order to improve their social skills: manualized cognitive-behavioral therapy (MCBT), non-manualized cognitive-behavioral therapy (NMCBT), and talk therapy (T). Following 2 months of therapy, the students are assessed on a standardized measure of social skills. On this instrument, scores range from 0–65, and higher scores indicate better or improved social skills, while lower scores indicate social skills that need improvement. These scores are shown in the table below. Conduct a one-way ANOVA to determine how effective these 3 therapy conditions are at improving social skills.

The steps will be the same as the ones you have been practicing in Part 1 of the assignment—the only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the “Variable View,” then return to the “Data View” to enter the data. (3 pts)


39, 32, 36, 33, 32, 37, 37, 38


32, 30, 28, 26, 31, 27, 29, 26


25, 31, 24, 26, 26, 30, 27, 25

2. What is the F ratio for the therapy group main effect? (3 pts)

3. What is the effect size for the overall effect of therapy type on social skills scores? According to general conventions, is this effect small, medium, or large? (3 pts)

4. Write an APA-style Results section describing the outcome. All homework “Results sections” must follow the example given in the Course Content document “Writing Results of Statistical Tests in Current APA Format” (Note: you do not have to refer to a figure). (3 pts)

5. The null hypothesis for this test can be written as follows: “There is no difference among the mean social skills scores across all three therapy conditions.” Based on your results, should this hypothesis be rejected or retained, and why? Write your answer in sentence form. (3 pts)

Part 3: Cumulative Homework

1.  In a study of the relationship between violent pornography and aggression toward women, 16 male volunteers are selected and randomly assigned to 1 of 2 groups. One group views a violent, sexually explicit film, and the other group sees a nature film. A test to measure aggressive feelings toward women is then administered to all participants. (High scores = high aggressive feelings.) Is there a significant difference between the groups on feelings of aggression towards women? Choose the correct test to analyze this question, set up the SPSS file, and run the analysis. Follow the directions under the table below.

Nature Film










Explicit Film








a)  Paste appropriate SPSS output. (3 pts)

b)  Paste appropriate SPSS graph. (3 pts)

c)  Write a Results section in current APA style describing the outcome. All homework “Results sections” must follow the example given in the Course Content document “Writing Results of Statistical Tests in Current APA Format” (Note: you do not have to refer to a figure). (3 pts)

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

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