Which of the following statements is correct?
A) Control groups are exposed to the opposite stimuli as the experimental group.
B) Placebos are given to both the control and experimental groups.
C) Experimental groups are exposed to the stimulus and not the placebo.
D) A stimulus is made available to those only in the control group.
E) none of these

Question

Quizplus · Accepted Answer

Experimental groups are the group that is exposed to the stimulus or intervention being studied, while control groups are not. The purpose of the control group is to provide a baseline to compare the experimental group to, so they should not be exposed to the stimulus. Placebos may be given to the control or experimental groups, but not both. Option A is incorrect because control groups are not exposed to any stimuli. Option D is incorrect because a stimulus should not be made available only to the control group.

Which of the Following Statements Is Correct