A Researcher Wonders About the Memory Performance of People with Parkinson

Multiple Choice

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