An experiment in which the true purpose is hidden from the researcher as well as from the participant is called a:
A)blind experiment.
B)double-blind experiment.
C)controlled experiment.
D)correlational study.

Question

Quizplus · Accepted Answer

A double-blind experiment is one in which the true purpose is hidden from both the researcher and the participant. This is done in order to prevent experimenter bias and placebo effects. In a blind experiment, only the participant is unaware of the true purpose of the study, while in a controlled experiment, one variable is manipulated while all others are held constant. A correlational study is one in which the relationship between two variables is studied, but no manipulation of variables is done. Therefore, the best choice for this question is B, double-blind experiment.

An Experiment in Which the True Purpose Is Hidden from the Researcher