Kuder-Richardson Formula 20

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In statistics, the Kuder-Richardson Formula 20 (KR-20) is a measure of internal consistency reliability for measures with dichotomous choices. It is analogous to Cronbach's α, except Chronbach's α is used for non-dichotomous measures. A high KR-20 coefficient (e.g., >0.90) indicates a homogeneous test.

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