Researchers in mental health fields are often interested in evaluating the effectiveness of using food images to enhance positive mood. Adapting a typical design from such studies, suppose we have participants rate their mood change on a standard self-report affect scale after viewing images of "comfort" foods, fruits/vegetables (F/V), and random non-food images (used as a control group). The results are given in the table at right for this hypothetical study.
Images | ||
---|---|---|
Control | F/V |
Comfort Foods |
0 | 0 | 4 |
1 | 1 | 2 |
1 | 2 | 3 |
3 | 3 | 5 |
0 | 1 | 1 |
(a) Complete the F-table. (Round your answers to two decimal places.)
Source of Variation |
SS | df | MS | Fobt |
---|---|---|---|---|
Between groups |
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Between persons |
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Within groups (error) |
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Total |
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