Probabilistic indices for interpreting correlation coefficient and mean difference

Abstract

Three probabilistic indices were proposed for interpreting major types of statistical results obtained in behavioral research : the probability of concordance as an index of correlation, and two versions of the probability of dominance being indices of mean difference in the case of randomized and paired data, respectively. Charts for rinding confidence intervals for their population values were provided. The relationships of these indices with certain nonparametric statistics were also noted. © 1987, The Japanese Association of Educational Psychology. All rights reserved.