Understanding and Computing Cohen’s Kappa: A Tutorial.

Publication Date

10-3-2007

Document Type

Article

Abstract

Cohen’s Kappa (Cohen, 1960) is an index of interrater reliability that is commonly used to measure the level of agreement between two sets of dichotomous ratings or scores. This tutorial explains the underlying logic of Kappa and shows why it is superior to simple percentage of agreement as a measure of interrater reliability. Examples demonstrate how to calculate Kappa both by hand and with SPSS.

Publication Title

WebPsychEmpiricist. Web Journal at http://wpe.info/

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