Interrater reliability: the kappa statistic

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Interrater reliability: the kappa statistic

The kappa statistic is frequently used to test interrater reliability. The importance of rater reliability lies in the fact that it represents the extent to which the data collected in the study are correct representations of the variables measured. Measurement of the extent to which data collectors (raters) assign the same score to the same variable is called interrater reliability. While ther...

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Confidence intervals for the kappa statistic

The command kapci calculates 100(1 − α)% confidence intervals for the kappa statistic using an analytical method in the case of dichotomous variables or bootstrap for more complex situations. For instance, kapci allows estimating CI for polychotomous variables using weighted kappa or for cases in which there are more than 2 raters/replications.

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Items such as physical exam findings, radiographic interpretations, or other diagnostic tests often rely on some degree of subjective interpretation by observers. Studies that measure the agreement between two or more observers should include a statistic that takes into account the fact that observers will sometimes agree or disagree simply by chance. The kappa statistic (or kappa coefficient) ...

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ژورنال

عنوان ژورنال: Biochemia Medica

سال: 2012

ISSN: 1846-7482

DOI: 10.11613/bm.2012.031