In a __________study, the participants do not know if they are part of the control group or the experimental group. Only the experimenter knows who is in each group.

Question

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In a single-blind study, the participants do not know if they are part of the control group or the experimental group, but the experimenter knows who is in each group. A placebo study involves giving a fake treatment to one group and the real treatment to another. In a double-blind study, both the participants and the experimenter are unaware of who is in the control group or the experimental group. There is no such thing as a triple-blind study.

In a __________Study, the Participants Do Not Know If They