A CONTROLLED, POWERFUL MULTIPLE-COMPARISON STRATEGY FOR SEVERAL SITUATIONS

The multiple-comparison procedure originally proposed by R. A. Fisher (1935) for the 1-way analysis of variance context has several desirabl e properties when K (the number of groups) is equal to 3. In this arti cle, the logic of the procedure is described in conjunction with those properties. A discussion follows of how the Fisher procedure can be s imilarly applied in a number of other K = 3 (and, more generally, 2-de gree-of-freedom) hypothesis-testing situations. Finally, the Fisher lo gic is combined with recent sequential applications of the Bonferroni inequality to illustrate the utility and versatility of that combinati on for the applied researcher.