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

Multiple Choice

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.