A Primer for the Use of Multilevel Models in Couple and Family Therapy Research

This article serves as a primer for understanding how to use multilevel modeling (MLM) techniques in couple and family therapy outcome and process research. It outlines the use of HLM and Mplus—two of many software programs that can perform multilevel modeling—and provides an applied example of using MLM to investigate the use of postsession feedback on couple satisfaction and change, as well as the influence of trauma on the use of postsession feedback. Two graduate students in COAMFTE accredited PhD programs read the primer and provided questions to the first author that arose. Answers to these questions have been incorporated throughout the explanation of this methodological approach in hopes of addressing common stuck points for those using MLM.