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Sagot :
If an observational study suffers from observer bias, then the researcher might be measuring the "observers' expectations" instead of the actual behavior or outcome
Observational studies examine participants without forcibly changing their circumstances, i.e. without intervention. A participant's behavior may change under observation, but the purpose of observational studies is to examine the 'natural' state of a risk factor, disease, or outcome.
Observational study designs, also called epidemiological study designs, are often retrospective and are used to assess possible causes of exposure-effect relationships and influence prevention strategies.
In an observational study, the researcher only observes the subjects and does not intervene or attempt to influence the results. In other words, researchers do not control treatment or assign subjects to experimental groups.
Learn more about the observational study here: https://brainly.com/question/17593565
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