So sánh phương pháp

	Hệ số tương quan Moment-Tích Pearson	Hệ số tương quan hạng Kendall Tau
Lĩnh vực	Thống kê	Thống kê
Họ	Hypothesis test	Hypothesis test
Năm ra đời	1895	1938
Người khởi xướng	Karl Pearson	Maurice G. Kendall
Loại	Parametric correlation	Rank-based association measure
Công trình gốc	Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences (2nd ed.). Lawrence Erlbaum Associates.	Kendall, M. G. (1938). A new measure of rank correlation. Biometrika, 30(1–2), 81–93.
Tên gọi khác	pearson r, product-moment correlation, bivariate correlation, Pearson Korelasyon Analizi	Kendall's tau, Kendall tau-b, tau correlation, Kendall Tau Korelasyonu
Liên quan	4	4
Tóm tắt	The Pearson product-moment correlation coefficient (r) is a parametric measure of the direction and strength of the linear association between two continuous variables. Introduced by Karl Pearson in 1895, it remains the most widely used bivariate correlation statistic in the social, health, and natural sciences. The coefficient ranges from −1 (perfect negative linear relationship) to +1 (perfect positive), with 0 indicating no linear association.	Kendall Tau is a nonparametric rank correlation coefficient introduced by Maurice G. Kendall in 1938 to measure the strength and direction of a monotone association between two ordinal or continuous variables. It is particularly suited to small samples and datasets containing many tied ranks, where the Spearman coefficient can be less stable.