Re: Cohen's Kappa for multiple raters

Posted by Meel on Nov 29, 2019; 1:42pm
URL: http://spssx-discussion.165.s1.nabble.com/Cohen-s-Kappa-for-multiple-raters-tp1072037p5738637.html

Brian,

You wrote: "As marginal homogeneity decreases (trait prevalence becomes more
skewed), the value of kappa decreases". Warrens (2010) says: "A paradox
associated with Cohen’s kappa is that, for a fixed value of the proportion
of observed agreement, tables with marginal asymmetry produce
higher values of kappa than tables with homogeneous
marginals"(https://openaccess.leidenuniv.nl/bitstream/handle/1887/16310/Warrens_2010_JoC_27_322_332.pdf?sequence=2).
What am I missing? Can you explain a bit more?




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