A researcher wonders about the memory performance of people with Parkinson 's disease, so he recruits 25 patients and gives them the CVLT, a standard memory test. He then gives 25 college students the same test, and compares the performance. What experimental design has he used?
A) one-group pretest-posttest design
B) pretest-posttest control group design
C) posttest only control group design
D) posttest only with nonequivalent control group design

Question

Quizplus · Accepted Answer

This is a posttest only with nonequivalent control group design because the researcher has two separate groups (Parkinson's patients and college students) that he is comparing based on their performance on the CVLT test. There is no pretest or control group, and the groups are nonequivalent because they differ in terms of age and health status.

A Researcher Wonders About the Memory Performance of People with Parkinson