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Kappa Coefficients for Circular Classifications

Warrens, M. J. & Pratiwi, B. C., Oct-2016, In : Journal of Classification. 33, 3, p. 507-522 16 p.

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Circular classifications are classification scales with categories that exhibit a certain periodicity. Since linear scales have endpoints, the standard weighted kappas used for linear scales are not appropriate for analyzing agreement between two circular classifications. A family of kappa coefficients for circular classifications is defined. The kappas differ only in one parameter. It is studied how the circular kappas are related and if the values of the circular kappas depend on the number of categories. It turns out that the values of the circular kappas can be strictly ordered in precisely two ways. The orderings suggest that the circular kappas are measuring the same thing, but to a different extent. If one accepts the use of magnitude guidelines, it is recommended to use stricter criteria for circular kappas that tend to produce higher values.

Original languageEnglish
Pages (from-to)507-522
Number of pages16
JournalJournal of Classification
Volume33
Issue number3
Publication statusPublished - Oct-2016

    Keywords

  • Cohen's kappa, Weighted kappa, Inter-rater agreement, Linear scale, Circular scale, COHENS WEIGHTED KAPPA, CIRCUMPLEX MODEL, AGREEMENT

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