Multivariate Analysis Versus Multiple Univariate Analyses

The argument for preceding multiple analysis of variance ( ANOVA s) with a multivariate analysis of variance ( MANOVA ) to control for Type I error is challenged. Several situations are discussed in which multiple ANOVA s might be conducted without the necessity of a preliminary MANOVA . Three reasons for considering a multivariate analysis are discussed: to identify outcome variable system constructs, to select variable subsets, and to determine variable relative worth.