Common
Cronbach's alpha
Statistical measure of reliability
Cronbach's alpha
Cronbach's alpha (Cronbach's α {\displaystyle \alpha } ) or coefficient alpha (coefficient α {\displaystyle \alpha } ), is a reliability coefficient and a measure of the internal consistency of tests and measures. It was devised by the American psychometrician Lee Cronbach. Today it enjoys such wide-spread usage that numerous studies warn against using Cronbach's alpha uncritically.
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