An index of validity that corrects for c
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Dr Stephen C. Newman
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Article
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1998
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John Wiley and Sons
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English
β 76 KB
## Abstract Cohen's (1960) kappa coefficient, ΞΊ, is a wellβknown index of reliability that corrects for chance agreement. The maximum and minimum values of kappa are examined. Using kappa as a theoretical framework, an index of validity is derived for the case of binary outcomes that summarizes sen