ERIC Number: EJ720494
Record Type: Journal
Publication Date: 2005-Mar
Reference Count: 42
Dispersion-Weighted Kappa: An Integrative Framework for Metric and Nominal Scale Agreement Coefficients
Schuster, Christof; Smith, David A.
Psychometrika, v70 n1 p135-146 Mar 2005
The rater agreement literature is complicated by the fact that it must accommodate at least two different properties of rating data: the number of raters (two versus more than two) and the rating scale level (nominal versus metric). While kappa statistics are most widely used for nominal scales, intraclass correlation coefficients have been preferred for metric scales. In this paper, we suggest a dispersion-weighted kappa framework for multiple raters that integrates some important agreement statistics by using familiar dispersion indices as weights for expressing disagreement. These weights are applied to ratings identifying cells in the traditional inter-judge contingency table. Novel agreement statistics can be obtained by applying less familiar indices of dispersion in the same way.
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A