An interaction effect can be defined as the effect ______.
A) of an independent variable within a single-factor research design
B) of one independent variable on the dependent variable changing at the different levels of another independent variable
C) of one independent variable at one of the levels of another independent variable
D) that does not occur between the independent variables and the dependent variables

Question

Quizplus · Accepted Answer

An interaction effect occurs when the effect of one independent variable on the dependent variable changes as the levels of another independent variable change. It refers to the combined impact of two or more independent variables on the dependent variable that is not equal to the sum of their individual effects. This is different from a main effect, which refers to the effect of an independent variable within a single-factor research design (choice A), and it is also not a result that only occurs at one level of an independent variable (choice C). The interaction effect also involves the independent variables and dependent variables, so it is not choice D. Therefore, B is the best choice.

An Interaction Effect Can Be Defined as the Effect ______