A common strategy in experimentation is to allow participants to choose if they would like to be studied in the experimental group or the control group.

Question

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Allowing participants to choose which group they want to be in can introduce selection bias, as certain types of people may be more likely to choose one group over the other. This can compromise the validity of the study results. Instead, participants should be randomly assigned to either the experimental or control group.

A Common Strategy in Experimentation Is to Allow Participants to Choose