In a factorial design,a main effect is the
A) effect of one independent variable at one level of another independent variable.
B) effect of one independent variable averaged over the levels of the other independent variable(s).
C) only effect of interest.
D) independent variable with the biggest effect on the dependent variable.

Question

Quizplus · Accepted Answer

A main effect is the effect of one independent variable averaged over the levels of the other independent variable(s). It allows us to understand the impact of each independent variable on the dependent variable independently of the other independent variable(s).

In a Factorial Design,a Main Effect Is the