Chapter 12: Experiments with more than one independent variable

Question 1

factorial design

Answer 1

a study in which there are 2 or more independent variables, also called factors

Question 2

participant variable

Answer 2

a variable such as age, gender, or ethnicity, whose levels are selected (measured) and not manipulated

Question 3

main effect

Answer 3

the overall effect of one independent variable on the dependent variable, averaging over the levels of the other independent variable

Question 4

marginal means

Answer 4

the arithmetic means for each level of an independent variable, averaging over 2 levels of another independent variable

Question 5

independent-groups factorial design

Answer 5

both independent variables are studied as independent groups

Question 6

within-groups factorial design

Answer 6

both independent variables are manipulated as within-groups

Question 7

mixed factorial design

Answer 7

one independent variable is manipulated as independent-groups and the other independent variable is manipulated as within-groups