So sánh phương pháp

	Độ tin cậy giữa những người đánh giá (hệ số kappa của Cohen và ICC)	Hệ số Kappa của Cohen	Phân tích Cronbach's Alpha (Độ tin cậy)	Độ tin cậy Kappa của Fleiss cho sự đồng thuận của nhiều người đánh giá
Lĩnh vực	Trắc lượng tâm lý	Thống kê	Thống kê	Thống kê
Họ	Latent structure	Hypothesis test	Latent structure	Hypothesis test
Năm ra đời	1960 (kappa); 1979 (ICC)	1960	1951	1971
Người khởi xướng	Cohen (kappa, 1960); Shrout & Fleiss (ICC, 1979)	Jacob Cohen	Lee J. Cronbach	Joseph L. Fleiss
Loại	Reliability / agreement analysis	Inter-rater reliability coefficient	Reliability / internal consistency coefficient	Non-parametric agreement measure
Công trình gốc	Cohen, J. (1960). A Coefficient of Agreement for Nominal Scales. Educational and Psychological Measurement, 20(1), 37–46.	Cohen, J. (1960). A Coefficient of Agreement for Nominal Scales. Educational and Psychological Measurement, 20(1), 37–46.	Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334.	Fleiss, J.L. (1971). Measuring Nominal Scale Agreement Among Many Raters. Psychological Bulletin, 76(5), 378–382.
Tên gọi khác	inter-rater reliability, interrater agreement, rater agreement, Değerlendiriciler Arası Güvenilirlik (Cohen's κ, ICC)	kappa coefficient, kappa statistic, Cohen's Kappa (Değerlendiriciler Arası Uyum)	coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha)	multi-rater kappa, Fleiss kappa, Fleiss' Kappa (Çoklu Değerlendirici Uyumu)
Liên quan	6	3	4	2
Tóm tắt	Interrater reliability quantifies the degree to which two or more independent raters produce consistent scores when evaluating the same individuals or products. The family encompasses Cohen's kappa, introduced in 1960 for categorical judgments, and the Intraclass Correlation Coefficient (ICC) for continuous ratings, together spanning most measurement scenarios encountered in behavioral, health, and educational research.	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.	Cronbach's alpha is a coefficient of internal consistency that quantifies the degree to which a set of items on a scale measures the same underlying construct. Introduced by Lee J. Cronbach in 1951, it remains the most widely reported reliability index in social-science, health, and educational research.	Fleiss' Kappa is a non-parametric statistic for measuring the degree of agreement among three or more raters who classify items into mutually exclusive nominal categories. Introduced by Joseph L. Fleiss in 1971 as a generalization of Cohen's Kappa beyond two raters, it corrects observed agreement for the level of agreement expected by chance alone, making it the standard reliability index in medical diagnosis studies, content analysis, and multi-coder research.