A major disadvantage of between-subjects designs is that
A) the effect of one treatment may alter the effectiveness of later treatments.
B) participant differences may obscure treatment effects.
C) one must employ fewer independent variables.
D) one can use only a single independent variable.

Question

Quizplus · Accepted Answer

Between-subjects designs involve different groups of participants for each condition, which can lead to variability in participant characteristics. This variability can obscure the effects of the treatment, as differences in outcomes may be due to participant differences rather than the treatment itself.

A Major Disadvantage of Between-Subjects Designs Is That