The primary reason why within-subjects designs are preferred over between-subjects designs is that
A) fewer participants are required.
B) there are no treatment order effects.
C) error variability is reduced.
D) the participants are less likely to figure out the purpose of the experiment.

Question

Quizplus · Accepted Answer

Error variability is reduced because each participant serves as their own control, eliminating individual differences between participants.

The Primary Reason Why Within-Subjects Designs Are Preferred Over Between-Subjects