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#### SPSS: Two-Way ANOVA Assignment Instructions Overview This assignment is designed to increase your statistical literacy and proficiency in conducting and interpreting the two-way independent-measures ANOVA

###### Statistics

SPSS: Two-Way ANOVA Assignment Instructions

Overview

This assignment is designed to increase your statistical literacy and proficiency in conducting and interpreting the two-way independent-measures ANOVA. You will be completing two 2-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 all problems, interpret results based on an alpha level of a = .05.
• This assignment is worth 90 points.

Please review the SPSS Homework Tutorial in this module for directions on how to run the statistical test, as well as the Results Sections in APA Style presentation, which includes a template for completing the APA-style Results sections for the two-way independent-measures ANOVA. The scenarios begin on the next page.

 Problem Set 1: The Two-Factor ANOVA for Independent Measures Research Scenario: In response to recent Gallup and Pew Center polls of Americans’ trust in their political leaders (http://www.gallup.com/poll/195716/americans-trust-political-leaders-public-new-lows.aspx; http://www.people-press.org/2014/11/13/public-trust-in-government/), a social psychologist decides to study people’s trust in politicians among different political parties and regions in his state. The psychologist administers a scale-level questionnaire with possible scores ranging from 1-50, with higher scores indicating higher trust in politicians, and lower scores indicating lower trust. The data from this scale-level questionnaire are shown in the table below. Conduct a two-way ANOVA to determine the effect of political party and region on trust in politicians. Create a multiple line graph to display the differences between the groups. Follow the directions below the table to complete the homework.

 Urban Rural Republican 16 32 29 18 18 19 28 29 37 26 Democrat 35 36 27 39 22 24 19 14 26 30 Libertarian 12 16 10 27 19 9 13 7 25 12 Independent 27 17 23 21 12 15 16 26 25 13

1. Paste SPSS output.  (10 pts)

1. Write an APA-style Results section based on your analysis. Include your multiple line graph as an APA-style Figure, with figure number and title, as demonstrated in the Results Section presentation. (Results = 12 pts; Figure = 8 pts)

 Problem Set 2: The Two-factor ANOVA for Independent Measures 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 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. Using this table, enter the data into a new SPSS data file and run a two-way ANOVA to test whether there is an effect of clinic type and/or treatment type on BDI scores. Create a multiple line graph to display the differences between the groups. Follow the directions below the table to complete the homework.

 Community Clinic University Clinic CBT 36 32 19 25 27 31 12 27 20 29 PD 24 41 38 12 46 42 21 37 53 19

1. Paste SPSS output.  (10 pts)

1. Write an APA-style Results section based on your analysis. Include your multiple line graph as an APA-style Figure, with figure number and title, as demonstrated in the Results Section presentation. (Results = 12 pts; Figure = 8 pts)

 Problem Set 3: Cumulative Knowledge Question 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. Choose the correct analysis (it will be one learned in a previous module) to determine whether there is a difference in SADS scores between the three treatments. Follow the directions below the table to complete this part.

 CBT Paxil ® CBT + Paxil ® 16 18 13 20 21 16 19 19 17 25 14 14 18 23 18 20 12 12 14 25 18 15 20 13

1. Paste SPSS output.  (10 pts)

1. Write an APA-style Results section based on your analysis. Include your multiple line graph as an APA-style Figure, with figure number and title, as demonstrated in the Results Section presentation. (Results = 12 pts; Figure = 8 pts)

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

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