#9089. KR20 and KR21 for Some Nondichotomous Data (It’s Not Just Cronbach’s Alpha)

August 2026publication date
Proposal available till 21-05-2025
4 total number of authors per manuscript3000 $

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Journal’s subject area:
Education;
Applied Mathematics;
Developmental and Educational Psychology;
Applied Psychology;
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Abstract:
This article presents some equivalent forms of the common Kuder–Richardson Formula 21 and 20 estimators for nondichotomous data belonging to certain other exponential families, such as Poisson count data, exponential data, or geometric counts of trials until failure.
Keywords:
Cronbach’s alpha; exponential families; KR-20; KR-21; reliability

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