手法を比較

	コーエンのカッパ係数	マクネマー検定
分野	統計学	統計学
系統	Hypothesis test	Hypothesis test
提唱年	1960	1947
提唱者	Jacob Cohen	Quinn McNemar
種類	Inter-rater reliability coefficient	Nonparametric test for paired binary data
原典	Cohen, J. (1960). A Coefficient of Agreement for Nominal Scales. Educational and Psychological Measurement, 20(1), 37–46.	McNemar, Q. (1947). Note on the sampling error of the difference between correlated proportions or percentages. Psychometrika, 12(2), 153–157.
別名	kappa coefficient, kappa statistic, Cohen's Kappa (Değerlendiriciler Arası Uyum)	McNemar chi-square test, test for correlated proportions, paired binary test, McNemar Testi
関連	3	5
概要	Cohen's kappa (κ) is a statistical measure of inter-rater reliability for categorical classifications, introduced by Jacob Cohen in 1960. Unlike simple percent agreement, kappa corrects for the level of agreement that would be expected purely by chance, making it the standard metric when two raters independently assign observations to the same set of mutually exclusive categories.	McNemar's test is a nonparametric hypothesis test that compares two paired (correlated) binary proportions, such as a yes/no measurement taken on the same subjects before and after an intervention. It was introduced by Quinn McNemar in 1947 and works on the 2×2 table of matched outcomes.