Learning Objectives

As you read the chapter, consider the following questions:
13.1 Can we examine more than one causal factor in a single study?
13.2 How do levels of a factor and conditions differ in a factorial design?
13.3 What is the difference between a main effect and an interaction?
13.4 How do we calculate an F ratio for an interaction?
13.5 What does a significant interaction tell us about our data?