Question 1

Suppose you had to train someone to be an ethical and competent experimenter. What would you emphasize?

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Question 2

Use the research example on studying in noisy versus quiet environments to illustrate the concept of an interaction in a factorial design.

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Question 3

Using just two participants, Jenkins and Dallenbach studied retroactive inference in a famous study. What were there two independent variables, how would you describe their design, and what happened in the study?

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Question 4

Distinguish between a mixed factorial design and a P x E factorial design and explain why the latter reflects the spirit of Lewin's beliefs about how to best understand behavior.

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Question 5

What is a ceiling effect and how can one's presence cloud the interpretation of a research outcome in a factorial design?

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Question 6

For a 2x2 factorial, how do the participant needs vary for designs that are (a) independent groups, (b) repeated measures, and (c) mixed?

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Question 7

What is the basic difference between a mixed factorial design and a PxE factorial design?

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Question 8

Use research example on closing times to illustrate the concept of a main effect.

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Question 9

Sometimes, in a study with both a main effect (or two) and an interaction, the interaction is the only important finding. Explain, using the caffeine study to illustrate.

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Question 10

In a study that produces both a main effect and an interaction, why is it important to interpret the interaction first?

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Quiz 8: Experimental Design II: Factorial Designs