In a single-blind study, the participants do not know the purpose of the study or the condition to which they are assigned. What is the difference in a double-blind study?
A) The researcher tells the participants the purpose and their assigned conditions in the study.
B) The participants also do not know when the actual study begins or ends.
C) The researcher also does not know which condition the participants are in.
D) The participants know to which condition they have been assigned, but the researcher does not.

Question

Quizplus · Accepted Answer

In a double-blind study, neither the participants nor the researchers know which condition the participants are in. This helps to reduce bias and control for the placebo effect. Option A is incorrect because it goes against the definition of a single-blind study, where participants do not know their assigned condition. Option B is not necessarily true and is not a defining characteristic of a double-blind study. Option D also goes against the definition of a double-blind study.

In a Single-Blind Study, the Participants Do Not Know the Purpose