Notes assumptions for analyzing treatment means in repeated measures designs. The traditional F test has been shown to have limitations, given violations of the assumption of sphericity. This assumption is probably infrequently satisfied in clinical applications. Discusses analytic alternatives based on a three-step Geisser-Greenhouse approach.…

A major form of data analysis in clinical child and adolescent psychology is multiple regression. This article reviews issues in the application of such methods in light of the research designs typical of this field. Issues addressed include controlling covariates, evaluation of predictor relevance, comparing predictors, analysis of moderation,…

Many psychological tests have arbitrary metrics but are appropriate for testing psychological theories. Metric arbitrariness is a concern, however, when researchers wish to draw inferences about the true, absolute standing of a group or individual on the latent psychological dimension being measured. The authors illustrate this in the context of 2…