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Assessing inter-rater agreement in Stata

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  • Daniel Klein

    (University of Kassel)

Abstract

Despite its well-known weaknesses and existing alternatives in the literature, the Kappa coefficient (Cohen 1960: Fleiss 1971) remains the most frequently applied statistic when it comes to quantifying agreement among raters. It is also the only available measure in official Stata that is explicitly dedicated to assessing inter-rater agreement for categorical data. In this presentation, I briefly review Cohen's Kappa and five related statistics within a general framework of chance-corrected agreement coefficients, discussed in Gwet (2014). The presentation covers the generalization of all measures to multiple raters, weights for partial disagreement that are suitable for any data level of measurement, the treatment of missing ratings, and a new probabilistic method for benchmarking the estimated coefficients. I introduce the kappaetc command, which implements these concepts.

Suggested Citation

  • Daniel Klein, 2017. "Assessing inter-rater agreement in Stata," German Stata Users' Group Meetings 2017 07, Stata Users Group.
  • Handle: RePEc:boc:dsug17:07
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