The interpretation of main effects obtained in a complex design is critically dependent on whether
A)only one main effect occurs in the experiment.
B)more than one main effect occurs in the experiment.
C)an interaction effect is present in the experiment.
D)an interaction effect is not present in the experiment.

Question

Quizplus · Accepted Answer

The presence or absence of an interaction effect in the experiment will influence the interpretation of main effects. In the presence of an interaction effect, the interpretation of main effects becomes more complex, and the unique contribution of each main effect cannot be isolated. Therefore, it is important to consider the presence of an interaction effect when interpreting main effects in a complex design. If there is no interaction effect, then the main effects can be interpreted independently.

The Interpretation of Main Effects Obtained in a Complex Design