Imagine an experiment with one independent variable: noise level (quiet vs. noisy). If the researcher is using a between-subjects design and wants to have 20 participants per condition, how many participants will he need all together?
A) 10
B) 20
C) 40
D) 400

Question

Quizplus · Accepted Answer

A between-subjects design means that there will be two separate groups of participants: one group exposed to quiet conditions and another group exposed to noisy conditions. Each group should have 20 participants, so in total the researcher will need 40 participants. Therefore, the correct answer is C.

Imagine an Experiment with One Independent Variable: Noise Level (Quiet