Membership bias

Membership in a specific group can be associated with a degree of health that differs significantly from the general population. Doing a study that focused specifically on joggers, or the employed, or physicians may suffer from membership bias.

Membership bias is a type of selection bias.


Sackett DL. Bias in analytic research. Journal of chronic diseases. 1979; 32(1-2):51-63. PMID: 447779

Cite this article as: Justin Morgenstern, "Membership bias", First10EM blog, April 10, 2018. Available at:
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