A major disadvantage of within-subjects designs is that:
A) they are less efficient
B) subject differences may obscure treatment effects
C) the effect of one treatment may alter the effectiveness of the other
D) one must use fewer independent variables

Question

Quizplus · Accepted Answer

The effect of one treatment may alter the effectiveness of another in within-subjects designs due to carryover effects, where the influence of one condition can affect the participant's response in subsequent conditions.

A Major Disadvantage of Within-Subjects Designs Is That