手法を比較

	ロバストケンドールタウ順位相関係数	スペルマン順位相関係数
分野	統計学	統計学
系統	Hypothesis test	Hypothesis test
提唱年	1990s–2000s	1904
提唱者	Rand Wilcox; Croux & Dehon (robust extensions)	Charles Spearman
種類	Robust rank correlation	Nonparametric rank-based correlation
原典	Wilcox, R. R. (2012). Introduction to Robust Estimation and Hypothesis Testing (3rd ed.). Academic Press. ISBN: 978-0123869838	Spearman, C. (1904). The proof and measurement of association between two things. The American Journal of Psychology, 15, 72–101.
別名	robust tau, skipped Kendall's tau, Winsorized Kendall's tau, outlier-resistant rank correlation	Spearman's rho, Spearman rank-order correlation, Spearman Sıra Korelasyonu
関連	5	4
概要	Robust Kendall's tau estimates the monotone association between two variables using rank-based concordance counts, but augments the standard procedure with outlier detection or Winsorization so that a small number of extreme observations cannot distort the result. It is appropriate when data are ordinal or continuous and bivariate outliers are plausible.	The Spearman rank correlation coefficient (ρ) is a nonparametric measure of the monotonic association between two variables. Introduced by Charles Spearman in 1904, it converts raw observations to ranks and measures how consistently one variable increases as the other increases, without assuming a normal distribution or a linear relationship.