Main effects are defined as the effect of ______.
A) the dependent variable on the independent variable within a factorial research design
B) one independent variable at one of the levels of another independent variable
C) an independent variable on the dependent variable within a factorial research design
D) one independent variable on the dependent variable that changes at the different levels of another independent variable

Question

Quizplus · Accepted Answer

Main effects refer to the effect of an independent variable on the dependent variable within a factorial research design. It is the simple effect of one independent variable while ignoring the other independent variable(s) in the design. Therefore, choice C correctly defines main effects.

Main Effects Are Defined as the Effect of ______