Evan Harmon - Memex

Self-selection bias

In statistics, Self-selection bias arises in any situation in which individuals select themselves into a group, causing a biased sample with nonprobability sampling. It is commonly used to describe situations where the characteristics of the people which cause them to select themselves in the group create abnormal or undesirable conditions in the group. It is closely related to the non-response bias, describing when the group of people responding has different responses than the group of people not responding.
wikipedia:: Self-selection bias
Self-selection bias
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Self-selection bias