Comparing the Pearson and Spearman correlation ...
https://pubmed.ncbi.nlm.nih.gov/27213982The Pearson product–moment correlation coefficient (r p) and the Spearman rank correlation coefficient (r s) are widely used in psychological research.We compare r p and r s on 3 criteria: variability, bias with respect to the population value, and robustness to an outlier. Using simulations across low (N = 5) to high (N = 1,000) sample sizes we show that, for normally …