Use SPSS for the following problem A psychologist was interested in the effects
ID: 3263237 • Letter: U
Question
Use SPSS for the following problem
A psychologist was interested in the effects of time of day on critical thinking. Participants were randomly assigned to one of three groups (Morning, Afternoon, or Night) and given a measure to test for the number of answers correct on a critical thinking ability test. The following data were obtained from the study.
Morning
1. Please state the hypotheses.
2. What is the IV? List all levels of the IV.
3. What is the DV?
4. Provide a formal APA-style answer (be sure to include descriptive statistics, inferential statistics, and the effect size).
Morning
Afternoon Night 4 3 8 3 1 4 4 3 6 5 1 6Explanation / Answer
Answer:
A psychologist was interested in the effects of time of day on critical thinking. Participants were randomly assigned to one of three groups (Morning, Afternoon, or Night) and given a measure to test for the number of answers correct on a critical thinking ability test. The following data were obtained from the study.
1. Please state the hypotheses.
2. What is the IV? List all levels of the IV.
IV: Time of the day (Morning, Afternoon, or Night)
3. What is the DV?
DV: number of answers correct on a critical thinking ability test
4. Provide a formal APA-style answer (be sure to include descriptive statistics, inferential statistics, and the effect size).
A one-way within subjects (or repeated measures) ANOVA was conducted to compare the effect of time on number of answers correct on a critical thinking ability test. The mean number of correct answer for morning is 4.00(0.82), for Afternoon is 2.00(1.15) and for Night is 6.00(1.63). There was a significant effect of the IV , F (2,6) = 18.00, p = .003. The effect size is 0.857.
SPSS OUTPUT:
Descriptive Statistics
Mean
Std. Deviation
N
Morning
4.0000
.81650
4
Afternoon
2.0000
1.15470
4
Night
6.0000
1.63299
4
Tests of Within-Subjects Effects
Measure: MEASURE_1
Source
Type III Sum of Squares
df
Mean Square
F
Sig.
Partial Eta Squared
time
Sphericity Assumed
32.000
2
16.000
18.000
.003
.857
Greenhouse-Geisser
32.000
1.882
17.000
18.000
.004
.857
Huynh-Feldt
32.000
2.000
16.000
18.000
.003
.857
Lower-bound
32.000
1.000
32.000
18.000
.024
.857
Error(time)
Sphericity Assumed
5.333
6
.889
Greenhouse-Geisser
5.333
5.647
.944
Huynh-Feldt
5.333
6.000
.889
Lower-bound
5.333
3.000
1.778
Descriptive Statistics
Mean
Std. Deviation
N
Morning
4.0000
.81650
4
Afternoon
2.0000
1.15470
4
Night
6.0000
1.63299
4
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