At a minimum, 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) 90
D) 120

Question

Quizplus · Accepted Answer

In a matched-subjects design, each participant in one condition is matched with a participant in each of the other conditions. For three treatment conditions with 20 scores each, you would need 20 participants who are each matched across the three conditions, resulting in a total of 60 participants.

At a Minimum, How Many Participants Would Be Needed for a Matched-Subjects