Compensatory behavior is a threat to internal validity that is a problem of extreme values or a tendency of random errors to move group results toward the average.

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Compensatory behavior is a threat to internal validity that occurs when members of the control group change their behavior in response to knowing they are in the control group, not because of extreme values or a tendency of random errors to move group results toward the average.

Compensatory Behavior Is a Threat to Internal Validity That Is