ERIC Number: EJ812123
Record Type: Journal
Publication Date: 2008-Sep
Abstractor: As Provided
Reference Count: 0
On Similarity Coefficients for 2x2 Tables and Correction for Chance
Warrens, Matthijs J.
Psychometrika, v73 n3 p487-502 Sep 2008
This paper studies correction for chance in coefficients that are linear functions of the observed proportion of agreement. The paper unifies and extends various results on correction for chance in the literature. A specific class of coefficients is used to illustrate the results derived in this paper. Coefficients in this class, e.g. the simple matching coefficient and the Dice/Sorenson coefficient, become equivalent after correction for chance, irrespective of what expectation is used. The coefficients become either Cohen's kappa, Scott's pi, Mak's rho, Goodman and Kruskal's lambda, or Hamann's eta, depending on what expectation is considered appropriate. Both a multicategorical generalization and a multivariate generalization are discussed.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
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