An interaction effect is likely to be uninterpretable when this problem in measurement occurs:
A)ceiling or floor effect.
B)simple main effect.
C)nonparallel lines.
D)highly reliable measurement of the dependent variable.

Question

Quizplus · Accepted Answer

A ceiling or floor effect occurs when a large proportion of the participants score at either the highest or lowest possible level on the dependent variable. This can lead to a lack of variability in the scores and make it difficult to interpret any interaction effects that may be present.

An Interaction Effect Is Likely to Be Uninterpretable When This