Pedhazur showed how to simplify the design matrix in repeated measures designs using a "total scores" vector. His use of this vector represents a special application of a data-analytic approach referred to as "criterion scaling" -an approach that has received little attention since Wherry and Taylor first discussed it almost four decades ago. This article reviews some of the properties of criterion-scaled regression analysis, especially as it relates to the analysis of a repeated measures/randomized blocks design.
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