APA Dictionary of Psychology

Ryan–Einot–Gabriel–Welsch multiple range test: a procedure used to evaluate if there are statistically significant differences between independent groups in a one-way analysis of variance of a balanced design. It is one of many such multiple comparison tests. Also called Ryan’s method. [Thomas A. Ryan Jr., U.S. statistician; Israel Einot, Israeli statistician; K. Ruben Gabriel (1929–2003), German-born U.S. statistician; Roy E. Welsch, U.S. statistician]