If a between-subjects experiment produces 50 scores in treatment 1 and 50 scores in treatment 2, then the experiment must have employed ____.
A) 25 participants
B) 50 participants
C) 100 participants
D) 200 participants

Question

Quizplus · Accepted Answer

In a between-subjects design, each participant is only in one treatment condition. Therefore, if there are 50 scores in treatment 1 and 50 scores in treatment 2, we know that there were at least 50 participants (and likely more, depending on any potential dropouts). Therefore, the experiment employed at least 100 participants, making choice C the correct answer.

If a Between-Subjects Experiment Produces 50 Scores in Treatment 1