I have small uncertainty with Cohen’s kappa coefficient and other kappa coefficients like Fleiss’ kappa or Siegel and Castellan's (1988) fixed-marginal multirater kappa.
Is Cohen’s kappa equal to the two others when we have only two annotators?
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Fleiss' kappa is a generalization of Scott's pi, not of Cohen's kappa
http://en.wikipedia.org/wiki/Cohen%27s_kappa
http://en.wikipedia.org/wiki/Scott%27s_pi
http://en.wikipedia.org/wiki/Fleiss%27_kappa
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Hello Jakub Marszałkowski, Just going from memory Armitage and Berry discuss the kappa statistic, but I've misplaced my book at the moment so sorry I can't check and this is from 10 or so years ago when I looked this up to use the kappa in some analysis I was doing for my MPH. I'll have a look for it, but have the problem of information overload too many books, papers [school, work and church clutter] and email so things are rather disorganised at the moment with my filing. Thanks
Deborah Hilton Statistics Online
http://sites.google.com/site/deborahhilton/
Hello,
Because kappa is influenced by nº observations as the measurements assigned to categories, reason should be replaced with advantage by the models of quasi-symmetry.
Kind regards,
Helena
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