modified Cohen’s kappa for more than 2 raters A Kappa statistic in which the expected agreement by chance is based on an assumption that the likelihood of each category for assignment is based on the proportion observed, and the number of raters is more than 2. A Kappa statistic is a measure of agreement among categorical assessments, corrected for chance agreement. In the modified Cohen's kappa for more than 2 raters, the expected chance agreement is modeled as the summation of the differences, between the square of the expected probability of the category and the quotient of its variance divided by the number of raters, for each category. The modified Cohen's kappa for more than 2 raters is calculated as ( p[a] - p[e] ) / ( 1 - p[e] ) where p[a] is the observed percent agreement and p[e] is the expected chance agreement. Expert Working Group Agreement: 2022-09-14 vote 5-0 by Nisha Mathew, Philippe Rocca-Serra, Harold Lehmann, Eric Harvey, Jesus Lopez-Alcalde Brian S. Alper, Harold Lehmann, Joanne Dehnbostel, Muhammad Afzal, Kenneth Wilkins kappa ready for release