Hefner wants to test the effects of Viagra on sexual desire. Dr. Hefner's research assistant (who is unaware of what the study is testing) randomly gives 50 males the drug while 50 males receive a placebo. (The study subjects are also unaware of the treatment that they are getting.) This would be described as a
A) correlational study.
B) double-blind study.
C) study with no control group.
D) study with two independent variables.
E) study that would be difficult to replicate.

Question

Quizplus · Accepted Answer

This is a double-blind study since both the subjects and research assistant are unaware of which treatment (Viagra or placebo) each subject is receiving. This helps to eliminate bias and increase the reliability of the results.

Hefner Wants to Test the Effects of Viagra on Sexual