A researcher investigating the effect of a new drug administers a placebo to the control group in order to
A) eliminate the Hawthorne effect.
B) provide better matching of subjects in the experimental and control groups.
C) minimize the experimenter effect.
D) separate the psychological aspects of the treatment from other effects.

Question

Quizplus · Accepted Answer

By administering a placebo to the control group, the researcher can separate the psychological aspects of the treatment from other effects, such as the placebo effect or natural recovery. This helps to determine the true efficacy of the new drug. The other options do not accurately describe the purpose of administering a placebo to the control group.

A Researcher Investigating the Effect of a New Drug Administers