If a control group realizes they are being denied some advantage, which two processes may create invalid experimental findings:

A. Compensatory rivalry and demoralization
B. Regression and maturation
C. Contamination and the placebo effect
D. The Hawthorne effect and the history effect

A. Compensatory rivalry and demoralization

Political Science

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Indicate whether the statement is true or false.

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Indicate whether the statement is true or false

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