Repeated measures designs

To facilitate innovation in applied psychology research, investigators need to be well informed about available research designs. The purpose of this article is to provide an overview of repeated measures research designs (e. g.. participants exposed to more than one treatment or measured on more tha n one occasion). My intent is twofold. First, I underscore the wide range o f repeated measures research designs available to researchers in applied ps ycholosy. Second, I argue that the differentiation and polarity of group an d single-subject research designs is largely arbitrary I use examples to il lustrate each repented measures design and present its strengths and limita tions.