correlation coefficient Goodman and Kruskal's gamma gamma coefficient Goodman-Kruskal gamma adapted from: https://stats.stackexchange.com/questions/18112/how-do-the-Goodman-Kruskal-gamma-and-the-Kendall-tau-or-Spearman-rho-correlation gamma statistic A measure of correlation, ranging from -1 to 1, that measures the strength and direction of the relationship between ranks by value of two ordinal or continuous variables, and is calculated based on the difference in the number of concordant and discordant pairs of rankings divided by the total number of pairs of rankings, where ties are not counted among the pairs of rankings. Brian S. Alper, Harold Lehmann, Joanne Dehnbostel Expert Working Group Agreement: 2023-01-25 vote 5-0 by Mario Tristan, Jesus Lopez-Alcalde, Joanne Dehnbostel, Harold Lehmann, Eric Harvey