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Participants were recruited via a newspaper advertisement looking for 24 participants that had been diagnosed with major depression and 24 participants that had not been diagnosed with major depression.

by | Sep 22, 2022 | Statistics

 

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Steps to Complete for the Problem Set
Step 1: SPSS spreadsheet
Put the data into SPSS (data view) NOTE: you can’t enter the data as it appears below. You have to do something to make the data work in the SPSS analysis.
Variable view
name the variables
label the variables
set the number of decimal places to match the data
set the measure correctly
Use the snipping tool to paste Variable View & Data View into Microsoft Word
Step 2: SPSS Factorial ANOVA
Run the analysis of variance, including descriptive statistics and partial eta squared as the estimate of effect size.
Depending on the version of SPSS you are using, some of the required boxes to check shown in the videos linked under content will be under different tabs than the video shows. All the options are there but SPSS moves them around a bit depending on the version. For example, to get the Grand Mean, Descriptive Statistics, and Effect Size tables in some versions it is under Options and newer versions under EM Means.
Do ensure you have the same tables in the output that are shown in the video. If you do not then you missed something.
Note: no post hoc tests will be required because we will only be dealing with 2 x 2 designs.
Copy the entire output into Microsoft Word.
Step 3: Excel Line Graph
Using Microsoft Excel, create a line graph of the dependent variable means by level of independent variable. For the graph, you are using the Interaction mean, and sd for the four groups (IVA levels by IVB levels) are in the Descriptive Statistics table in row with level names.
The description below the video showing how to graph explains where the data is at in your output that you will use to make the graph.
Y-axis starts at 0.
Title both the x & y-axis based on the scenario.
You should not have a title above the graph.
Include a legend.
You do not have to include error bars.
Copy the line graph into Microsoft Word
Step 4: APA write up
APA format factorial ANOVA write up for the problem set, written in Microsoft Word.
Problem Set
A researcher is interested in the effects of therapy and major depression on the number of cigarette packs smoked per month in young adult smokers. Participants were recruited via a newspaper advertisement looking for 24 participants that had been diagnosed with major depression and 24 participants that had not been diagnosed with major depression.
The researcher randomly assigned half the participants from the two major depression groups [presence major depression (n = 12) & absence major depression (n = 12)] to attend group therapy once a week for 6 months. The other half of the participants from the two major depression groups [presence major depression (n = 12) & absence major depression (n = 12)] were assigned to attend individual therapy once a week for 6 months.
The researcher asked all participants to report the number of cigarette packs they smoked each month. The researcher only used in the below data the number of cigarette packs smoked for the 6 month, which was the last month of therapy for all participants. The research question: “What are the effects of type of therapy (individual or group) and diagnosis of major depression (presence or absence) on the number of cigarette packs smoked per month by young adult smokers?”
Hint: You will need ONE column for each independent variable and one column for the dependent variable (SCORES).
PresenceMDep
IndTherapy
PresenceMDep
GrpTherapy
AbsenceMDep
GrpTherapy
AbsenceMDep
IndTherapy
8
15
30
20
15
5
10
12
5
9
10
8
5
10
10
7
12
4
9
8
6
10
12
5
10
8
7
5
9
1
1
3
5
9
8
4
5
10
10
7
1
4
1
4
6
5
2
2
Due Date
Sep 26, 2022 9:00 AM
Hide Rubrics
Rubric Name: SPSS HW 4
SPSS
Correct
2 points
Errors
1 point
Incorrect
0 points
Criterion Score
Data & Variable View – 3 columns: IV, IV, DV Variable Name Label Decimals Measure
Score of Data & Variable View – 3 columns: IV, IV, DV Variable Name Label Decimals Measure,/ 2
SPSS Output
Correct
6 points
1 error
5 points
2 errors
4 points
3 errors
3 points
Incorrect
0 points
Criterion Score
Output – Factors Table (1pt), Descriptive Statistics (2pts), Between-Subjects Effects Table (1pt), Partial Eta Sq. (1pt), Grand Mean (1pt)
Score of Output – Factors Table (1pt), Descriptive Statistics (2pts), Between-Subjects Effects Table (1pt), Partial Eta Sq. (1pt), Grand Mean (1pt),/ 6
Graph
Correct
6 points
Error
5.5 points
Errors
5 points
Some Errors
4.5 points
Many Errors
4 points
Incorrect
0 points
Criterion Score
Excel Line Graph: correct means used (1 pt) should have no title above it (1pt) x & y axis titled (2pts) legend need similar descriptive titles related to scenario (1pt) y axis starts a 0 (1 pt)
Score of Excel Line Graph: correct means used (1 pt) should have no title above it (1pt) x & y axis titled (2pts) legend need similar descriptive titles related to scenario (1pt) y axis starts a 0 (1 pt),/ 6
Design
Correct
4 points
1 Error
3 points
2 Errors
2 points
3 Errors
1 point
Incorrect
0 points
Criterion Score
Design sentence: 1 pt for analysis identified 1 pt for mean DV 1 pt for each IV including levels
Score of Design sentence: 1 pt for analysis identified 1 pt for mean DV 1 pt for each IV including levels,/ 4
Statistical Write Up
Correct
6 points
Some Errors
5 points
Errors
4 points
Many Errors
3 points
Incorrect
0 points
Criterion Score
Main Effect – 2 for sig 1 for df 1 for F 1 for p 1 for partial eta sq.
Score of Main Effect – 2 for sig 1 for df 1 for F 1 for p 1 for partial eta sq.,/ 6
Main Effect – 2 for sig 1 for df 1 for F 1 for p 1 for partial eta sq.
Score of Main Effect – 2 for sig 1 for df 1 for F 1 for p 1 for partial eta sq.,/ 6
Interaction – 2 for sig 1 for df 1 for F 1 for p 1 for partial eta sq.
Score of Interaction – 2 for sig 1 for df 1 for F 1 for p 1 for partial eta sq.,/ 6
Interpretation
Correct
3 points
Some Errors
1.5 points
Incorrect
0 points
Criterion Score
Main Effect Interpretation – 1 mean & sd for IV1 1 mean & sd for IV2 1 direction of difference
Score of Main Effect Interpretation – 1 mean & sd for IV1 1 mean & sd for IV2 1 direction of difference,/ 3
Main Effect Interpretation: 1 mean & sd for IV1 1 mean & sd for IV2 1 direction of difference
Score of Main Effect Interpretation: 1 mean & sd for IV1 1 mean & sd for IV2 1 direction of difference,/ 3
Interpretation
Correct
8 points
Some Errors
4 points
Incorrect
0 points
Criterion Score
Interaction interpretation: 1 pt for each of the 4 mean & sd 1 pt for each of 4 direction of difference
Score of Interaction interpretation: 1 pt for each of the 4 mean & sd 1 pt for each of 4 direction of difference,/ 8
Total
Score of SPSS HW 4,/ 50
Overall Score
Level 4
11 points minimum
Level 3
8 points minimum
Level 2
5 points minimum
Level 1
0 points minimum

 

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