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DOI: 10.2307/2529310

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# The Measurement of Observer Agreement for Categorical Data

## J. R. Landis,Gary G. Koch

Categorical variable

Homogeneity (statistics)

Kappa

1977

This paper presents a general statistical methodology for the analysis of multivariate categorical data arising from observer reliability studies. The procedure essentially involves the construction of functions of the observed proportions which are directed at the extent to which the observers agree among themselves and the construction of test statistics for hypotheses involving these functions. Tests for interobserver bias are presented in terms of first-order marginal homogeneity and measures of interobserver agreement are developed as generalized kappa-type statistics. These procedures are illustrated with a clinical diagnosis example from the epidemiological literature.

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Linear Models

“The Measurement of Observer Agreement for Categorical Data” is a paper by J. R. Landis Gary G. Koch published in the journal Biometrics in 1977. It was published by Wiley. It has an Open Access status of “closed”. You can read and download a PDF Full Text of this paper here.