observer error

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An error of observation or measurement due to failure of the observer to identify, measure accurately, or interpret some aspect of the phenomena that are being observed. This can have many reasons and causes, including careless or hasty measurements, faulty instruments, erroneous or illogical interpretation, and/or any of many possible sources of bias. It erodes the credibility of science when it occurs.

Subjects: Public Health and Epidemiology.

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