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Problem Set 1: The One-way ANOVA

Research Scenario: Depressed patients are randomly assigned to 1 of 3 therapists. At the end of 3 months, each patient completes a standardized test of depression (higher scores indicate higher level of depression). The patients’ scores are shown below. Analyze the data to determine how effective these 3 therapists are at treating depression (assume that before the treatment, all 3 groups of patients had the same average depression score).

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 patients’ depression scores among the three therapists. Create a boxplot to show the difference among these scores.

 

 

 

Therapist 1

35

37

35

37

36

33

39

Therapist 2

36

37

37

31

39

35

32

 

Therapist 3

29

32

25

28

33

30

32

1.      Paste SPSS output.  (7 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 = 8 pts; Graph = 5 pts)

 

Problem Set 2: 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 in alienation scores among the three groups.

First-generation

immigrants

35

39

34

37

36

23

39

Second-generation

immigrants

26

37

28

29

36

25

18

 

Non-immigrants

29

22

17

25

19

30

16

 

 

1.      Paste SPSS output.  (7 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 = 8 pts; Graph = 5 pts)

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  • Submitted On 12 Sep, 2018 10:05:36
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a) SPSS output (5 pts) Between-Subjects Factors Value Label N Depressed Patients 1 Therapist 1 7 2 Therapist 2 7 3 Therapist 3 7 Descriptive Statistics Dependent Variable: Depression Scores Depressed Patients Mean Std. Deviation N Therapist 1 36.00 1.915 7 Therapist 2 35.29 2.870 7 Therapist 3 29.86 2.795 7 Total 33.71 3.717 21 Levene's Test of Equality of Error Variancesa Dependent Variable: Depression Scores F df1 df2 Sig. .708 2 18 .506 Tests the null hypothesis that the error variance of the dependent variable is equal across groups....
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  • Submitted On 18 Sep, 2018 02:03:34
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Patients with major depression respond to antidepressant treatment, but 10%–30% of them do not improve or show a partial response coupled with functional impairment, poor quality of life, sui...
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