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

Samuel B. Green

doi:10.1177/001316448104100415

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

Samuel B. Green

Research output: Contribution to journal › Article › peer-review

11 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 language	English (US)
Pages (from-to)	1069-1072
Number of pages	4
Journal	Educational and Psychological Measurement
Volume	41
Issue number	4
DOIs	https://doi.org/10.1177/001316448104100415
State	Published - Dec 1981
Externally published	Yes

ASJC Scopus subject areas

Education
Developmental and Educational Psychology
Applied Psychology
Applied Mathematics

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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.",

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

Abstract

ASJC Scopus subject areas

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