Normal-Theory Methods: Repeated Measures ANOVA

Abstract

The unstructured multivariate approach described in Chapters 3 and 4 makes no assumptions concerning the covariance structure of the vector of repeated measurements from each experimental unit. Although not making covariance structure assumptions may be advantageous, these approaches can result in low power to detect differences of interest. This is due to the fact that a large number of degrees of freedom must be used to estimate the covariance parameters.