How many total subjects are needed in a 2 x 2 repeated-measures design with 10 subjects in each treatment condition?
A) 10
B) 20
C) 40
D) 80

Question

Quizplus · Accepted Answer

In a 2 x 2 repeated-measures design, each subject participates in all treatment conditions. Therefore, if there are 10 subjects in each treatment condition, you only need a total of 10 subjects, as the same subjects are used across all conditions.

How Many Total Subjects Are Needed in a 2 X