A Comparison of Three Indexes of Agreement Between Observers: Proportion of Agreement, G-Index, and Kappa

Samuel B. Green

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

A simple model of observation is proposed which allows for guessing. The proportion of agreement, G, and kappa indexes are shown to differ in how they correct for chance agreements between two observers. On the basis of the findings, it is suggested that no single agreement index is appropriate for all sets of data.

Original languageEnglish (US)
Pages (from-to)1069-1072
Number of pages4
JournalEducational and Psychological Measurement
Volume41
Issue number4
DOIs
StatePublished - 1981
Externally publishedYes

ASJC Scopus subject areas

  • Developmental and Educational Psychology
  • Applied Psychology
  • Applied Mathematics
  • Education

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