How many participants would be needed for a matched-subjects design comparing three different treatment conditions with 20 scores in each treatment?
A)20
B)60
C)120
D)cannot answer without more information.

Question

Quizplus · Accepted Answer

In a matched-subjects design, each participant is matched with another participant who has similar characteristics. Therefore, for three treatment conditions, we would need three groups of matched participants. If each group has 20 scores, then we would need a total of 60 participants (20 in each group) for the study. Therefore, the correct answer is B.

How Many Participants Would Be Needed for a Matched-Subjects Design