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Measurement of Interobserver Disagreement: Correction of Cohen’s Kappa for Negative Values
Author
Source
Journal of Probability and Statistics
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-09-30
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
As measures of interobserver agreement for both nominal and ordinal categories, Cohen’s kappa coefficients appear to be the most widely used with simple and meaningful interpretations.
However, for negative coefficient values when (the probability of) observed disagreement exceeds chance-expected disagreement, no fixed lower bounds exist for the kappa coefficients and their interpretations are no longer meaningful and may be entirely misleading.
In this paper, alternative measures of disagreement (or negative agreement) are proposed as simple corrections or modifications of Cohen’s kappa coefficients.
The new coefficients have a fixed lower bound of −1 that can be attained irrespective of the marginal distributions.
A coefficient is formulated for the case when the classification categories are nominal and a weighted coefficient is proposed for ordinal categories.
Besides coefficients for the overall disagreement across categories, disagreement coefficients for individual categories are presented.
Statistical inference procedures are developed and numerical examples are provided.
American Psychological Association (APA)
Kvålseth, Tarald O.. 2015. Measurement of Interobserver Disagreement: Correction of Cohen’s Kappa for Negative Values. Journal of Probability and Statistics،Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1070008
Modern Language Association (MLA)
Kvålseth, Tarald O.. Measurement of Interobserver Disagreement: Correction of Cohen’s Kappa for Negative Values. Journal of Probability and Statistics No. 2015 (2015), pp.1-8.
https://search.emarefa.net/detail/BIM-1070008
American Medical Association (AMA)
Kvålseth, Tarald O.. Measurement of Interobserver Disagreement: Correction of Cohen’s Kappa for Negative Values. Journal of Probability and Statistics. 2015. Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1070008
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1070008