How does a double-blind experiment work?
A)Both subject groups take turns getting each treatment.
B)Neither subjects nor researchers know which subjects are in the control or experimental group
C)Neither group of subjects knows whether they are in the control or experimental group, but the researchers do know.
D)Both subject groups know whether they are in the control or experimental group, but the researchers do not know.
E)Neither the subjects nor the persons having contact with the subjects know the true purpose of the experiment.

Question

Quizplus · Accepted Answer

In a double-blind experiment, both the subjects and the researchers do not know which subjects are in the control group and which ones are in the experimental group. This eliminates bias from the experiment as neither the researchers nor the subjects can behave differently based on their knowledge of which group they are in. Therefore, option B, where neither subjects nor researchers know which subjects are in the control or experimental group, is the correct answer.

How Does a Double-Blind Experiment Work