What is the main advantage of conducting an experiment using a within-subjects design rather than a between-subjects design?
A) A within-subjects design eliminates the need for pilot testing.
B) A within-subjects design controls more extraneous variables.
C) A within-subjects design does not require manipulation of an independent variable.
D) A within-subjects design prevents carryover effects.

Question

Quizplus · Accepted Answer

Within-subjects design controls for individual differences between participants, which can be a major source of error in between-subjects designs. By allowing each participant to serve as their own comparison group, extraneous variables are controlled for and the effect of the independent variable can be more accurately assessed.

What Is the Main Advantage of Conducting an Experiment Using