Short Answer

1. Give two major advantages of factorial designs over doing two separate experiments.
Ans: Factorial designs allow researchers to examine multiple factors in one single study, as well as their combined effects, called interaction effects, on the data.
Learning Objective: 13-2 How do levels of a factor and conditions differ in a factorial design?
Cognitive Domain: Comprehension
Answer Location: Factorial Designs

2. In a factorial design ANOVA, what is a main effect?
Ans: In a factorial design ANOVA, a main effect is the effect of one of the independent variables ignoring the pattern of results on the other independent variable.
Learning Objective: 13-3: What is the difference between a main effect and an interaction?
Cognitive Domain: Comprehension
Answer Location: Factorial Designs