Browse the glossary:
apprehension bias
— When a study participant responds differently due to being observed.
Full explanation:
The fact or process of investigation can result in measurements being different from the usual for a study participant.
This can partly be due to behavioural change, as described in the Hawthorne effect, which can be to some extent a conscious response to being studied. In addition, this reaction to being studied can result in altered physiological measurements, presumably largely unconsciously, and this can be termed apprehension bias.
Example:
Read the full entry: Apprehension bias in the Catalogue of Bias.
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