Weighted Kappas for Tables

Matthijs J. Warrens

Journal of Probability and Statistics, 2013, vol. 2013, 1-9

Abstract:

Weighted kappa is a widely used statistic for summarizing inter-rater agreement on a categorical scale. For rating scales with three categories, there are seven versions of weighted kappa. It is shown analytically how these weighted kappas are related. Several conditional equalities and inequalities between the weighted kappas are derived. The analytical analysis indicates that the weighted kappas are measuring the same thing but to a different extent. One cannot, therefore, use the same magnitude guidelines for all weighted kappas.

Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnljps:325831

DOI: 10.1155/2013/325831

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