The BEST definition of a double-blind study is research in which _____.

Question

Quizplus · Accepted Answer

In a double-blind study, both the researcher and the participants are unaware of who is in the experimental and control groups. The purpose of this is to eliminate bias and increase the validity of the study results. Option A is incorrect because everyone involved should know what they are doing, and option B is incorrect because usually the researchers know the groups to which the participants belong. Option D is incorrect because it is not a requirement of a double-blind study to have two control groups or placebo conditions.

The BEST Definition of a Double-Blind Study Is Research in Which