Attrition bias

Noun

Definitions

1.NounA type of selection bias in statistical analysis, caused by loss of participants (attrition) in the course of a study; the subjects that do not run into completion of the study may differ systematically of those who do.

Synonyms

bias attrition toupee fallacy file-drawer problem undercoverage base rate fallacy underselection underattendance byfall anecdotal evidence false negative casualty

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