Key points are not available for this paper at this time.
J. A. Cohen's kappa (1960) for measuring agreement between 2 raters, using a nominal scale, has been extended for use with multiple raters by R. J. Light (1971) and J. L. Fleiss (1971). In the present article, these indices are analyzed and reformulated in terms of agreement statistics based on all
Anthony J. Conger (1980) studied this question.