Weighted kappa as a function of unweighted kappas. Issue 5 (28th May 2017)

• Record Type: Journal Article
• Authors: Moradzadeh, N.; Ganjali, M.; Baghfalaki, T.
• Is Part Of: Communications in statistics. Volume 46:Issue 5(2017)
• Page Start: 3769
• Page End: 3780
• Publication Date: 2017-05-28
• Subjects: Cohen's kappa -- Linear weights -- Merging categories -- Quadratic weights; 62H17 -- 62H20; Mathematical statistics -- Periodicals; Mathematical statistics -- Data processing -- Periodicals; Digital computer simulation -- Periodicals; 519.5
• DOI: 10.1080/03610918.2015.1105975
• Languages: English
• ISSNs: 0361-0918

Abstract

ABSTRACT: The kappa coefficient is a widely used measure for assessing agreement on a nominal scale. Weighted kappa is an extension of Cohen's kappa that is commonly used for measuring agreement on an ordinal scale. In this article, it is shown that weighted kappa can be computed as a function of unweighted kappas. The latter coefficients are kappa coefficients that correspond to smaller contingency tables that are obtained by merging categories.