Abstract
Abstract This entry reviews some well‐known indices of agreement, the conceptual and statistical issues related to their estimation, and their interpretation for both categorical and interval scale measurements. Particular measures of agreement that are discussed include kappa, a measure of category distinguishability, measure for agreement with nominal responses, monotonic agreement, and agreement measures for 2 × 2 tables. Agreement of multiple raters for the same subject is also discussed, together with the use of unanimity and majority rules. Software to carry out these calculations is also mentioned.
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