Masking or blinding is a strategy used in research to limit the effects of knowing whether or not a subject is getting a therapy. The use of a placebo is one way to mask a subject from knowing whether they are receiving an active treatment or agent or whether they are in the control group. The strategy of “double blinding” is to mask observers and data collectors from knowing which group the subjects are in.
Summary of Placebo effect and masking
Evaluation of diagnostic tests
Causation, validity and bias
AssessmentsPlacebo effect and masking
Placebo effect and masking
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