Chris would like to conduct a study on the effectiveness of a new substance-abuse treatment program. He has a sample of participants go through the program and he uses as a comparison group people who did not volunteer for the program but were eligible. Chris has used a(n) _________ design for his study.
A) interrupted time-series
B) pretest-posttest control-group
C) nonequivalent group
D) Solomon four-group

Question

Quizplus · Accepted Answer

Chris has used a nonequivalent group design because he is comparing a group that went through the program with a group that did not volunteer for the program, making the groups not equivalent.

Chris Would Like to Conduct a Study on the Effectiveness