方法对比

	肯德尔τ秩相关	Pearson积矩相关系数
领域	统计学	统计学
方法族	Hypothesis test	Hypothesis test
起源年份	1938	1895
提出者	Maurice G. Kendall	Karl Pearson
类型	Nonparametric rank correlation	Parametric correlation
开创性文献	Kendall, M. G. (1938). A new measure of rank correlation. Biometrika, 30(1/2), 81–93.	Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences (2nd ed.). Lawrence Erlbaum Associates.
别名	Kendall tau, Kendall rank correlation, tau-b, tau-c	pearson r, product-moment correlation, bivariate correlation, Pearson Korelasyon Analizi
相关	4	4
摘要	Kendall's tau is a nonparametric measure of the ordinal association between two variables. It quantifies how consistently the relative ordering of one variable matches the ordering of another across all observation pairs, making it robust to outliers and suitable for ordinal or non-normally distributed data.	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.