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Those in a control group would not know they are in the control group, and they would not receive whatever manipulation that is being tested. If it is a drug being tested, those in the control group would receive a placebo (typically sugar pills or saline injections). If it is a behavior being tested such as exercise, the control group would either do a behavior like reading that has nothing to do with the experiment, or they would just mentally visualize that they are doing what is being tested (such as pretending to exercise). Now, if visualizing is the experiment, then maybe there should be two control groups, one that actually does what is being visualized, and one that does a more sedentary activity that has nothing to do with the experiment.

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11y ago

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