An experiment is called double-blind when
A) the hypothesis being tested is not based on previous observations.
B) it has already been performed by different researchers.
C) neither the subjects nor the researchers know who is in the experimental and control groups.
D) the results of the experiment are only revealed to certain researchers.

Question

Quizplus · Accepted Answer

In a double-blind experiment, both the subjects and researchers are unaware of who is in the experimental and control groups. This helps to prevent any bias or influence in the results. Choices A, B, and D are incorrect as they do not accurately describe what a double-blind experiment is.

An Experiment Is Called Double-Blind When