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 2
If productivity increased in a factory after all of its employees were switched to a work schedule consisting of four 10-hour days, should management really credit the schedule switch with the improvement?
a. Yes
b. Yes, but only if no workers had left the factory
c. No. There are too many threats to validity to draw that conclusion
d. No. You would need to conduct a survey to be sure.
Parkinson’s Disease
Alcoholic Liver Disease
Out of Many: A History of the American People
Memory Changes
Stenotic valve disease.
Why do people hate mathematics?