ConceptHawthorne effect
Hawthorne Effect
An experimental bias in which subjects alter their behavior because they are aware of being observed. It is a validity threat that must be controlled in behavioral research.
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Oct 17
Such self-controlled or small-sample experiments have limitations and may produce a Hawthorne effect; without blinding and random assignment, confounding factors are hard to rule out, so 'one hour less per day' should be regarded as a valuable effect-size estimate rather than a precise causal conclusion.
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