The Equivalence of Weighted Kappa and the Intraclass Correlation Coefficient as Measures of Reliability - Joseph L. Fleiss, Jacob Cohen, 1973
GitHub - Shamya/FleissKappa: Implementation of Fleiss' Kappa (Joseph L. Fleiss, Measuring Nominal Scale Agreement Among Many Raters, 1971.)
ENH/FAQ: Fleiss Kappa giving nan results, randolph's kappa · Issue #4387 · statsmodels/statsmodels · GitHub
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