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Cohen’s kappa is a popular descriptive statistic for measuring agreement between two raters on a nominal scale. Various authors have generalized Cohen’s kappa to the case of m≥2 raters. We consider a family of multi-rater kappas that are based on the concept of g-agreement (g=2,3,…,m), which refers to the situation in which it is decided that there is agreement if g out of m raters assign an object...
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