Test Yourself

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1. An experiment that examines the effects of four levels of music on performance is a factorial experiment.
2. You have the following groups: Group 1 (No Treatment), Group 2 (Treatment A only), Group 3 (Treatment B only), and Group 4 (Treatment A and B). How many factors (independent variables) do you have in your experiment?
3. You have the following groups: Group 1 (No Treatment), Group 2 (Treatment A), Group 3 (Treatment B), and Group 4 (Treatment C). Do you have a factorial experiment?
4. A factorial experiment has at least two dependent variables.
5. A 2 X 2 experiment yields ____ overall main effects.
6. In a factorial experiment, you could estimate the overall main effect of a treatment by _____ its simple main effects.
7. You have the following means:
No Treatment A Treatment A
No Treatment B 5 10
Treatment B 15 20

Do you have an interaction?

8. You have the following means:
No Treatment A Treatment A
No Treatment B 15 10
Treatment B 15 20

Do you have an interaction?

9. Testing for interactions would be most helpful for addressing questions about the ____ validity of an effect.
10. Moderating variables are most likely to produce




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