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Psychology
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The Psychologist
Quiz 12: Designing, Conducting, Analyzing, and Interpreting Experiments With Multiple Independent Variables
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Question 201
Essay
How does the principle of parsimony relate to practical considerations when choosing a factorial design?
Question 202
Short Answer
What is the difference between adding levels of an IV to a multiple-group design versus a factorial design? In your answer, discuss the number of groups that will get added in each case.
Question 203
Essay
What does it mean when results are "marginally significant?" What is the relationship between marginal significance and Type I errors?
Question 204
Short Answer
Suppose you have conducted a 2 x 2 completely between-groups experiment. What are the three F ratio formulas you will need in order to analyze your data?