In experiments, when only the study subjects don't know which treatment group they are in, we call this a ____ - blind study, whereas if both the subjects and the people administering the treatment don't know, we call this a ____ - blind study.

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A single-blind study is when only the participants are unaware of which group they belong to, while a double-blind study is when both the participants and the researchers do not know who has been assigned to which group.

In Experiments, When Only the Study Subjects Don't Know Which