A researcher examined judgments of responsibility for an automobile accident by manipulating the type of injuries received (none, mild, or severe) and the time of the accident (7 a.m., 12 p.m., 6 p.m., or 3 a.m.). How many main effects are possible in this study?
A)2
B)4
C)7
D)12

Question

Quizplus · Accepted Answer

Main effects are calculated based on the number of independent variables in a study. Here, there are two independent variables: type of injuries received and time of the accident. Therefore, there are two possible main effects.

A Researcher Examined Judgments of Responsibility for an Automobile Accident