In a double-blind experiment, participants are both blindfolded and placed in a sound-proof chamber.

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In a double-blind experiment, the participants are not blindfolded or placed in a sound-proof chamber. Rather, they are randomly assigned to either a control group or an experimental group, and neither the participants nor the researchers conducting the study know which group they are in. This helps to reduce bias and increase the validity of the study.

In a Double-Blind Experiment, Participants Are Both Blindfolded and Placed