In a between-subjects design, the separate groups must be as ____.
A) similar in participant characteristics as possible
B) different in all environmental variables as possible
C) similar in treatment conditions as possible
D) similar on the dependent variable measures as possible

Question

Quizplus · Accepted Answer

In a between-subjects design, the groups are exposed to different conditions or treatments. Therefore, to eliminate the possibility of extraneous variables affecting the results, the groups must be as similar as possible in participant characteristics (such as age, gender, educational level, etc.). This helps ensure that any differences in the dependent variable are due to the treatment condition rather than individual differences between participants.

In a Between-Subjects Design, the Separate Groups Must Be as ____