This workshop is intended for researchers from a broad array of disciplines (clinical, social and developmental psychology, public health, social work) who are interested in interpersonal processes and the study of interpersonal relationships.  Statistical models of these relationships can be estimated using both multilevel modeling and structural equation modeling.  The SEM approach is preferred for dyads where gender or role (e.g., father, mother, and child) distinguish the group members.  This workshop will introduce the SEM approach to the Actor-Partner Interdependence Model and the Social Relations Model for distinguishable couple and family dyads.  A computer lab experience will provide hands-on experience implementing the methods using the R package LAVAAN, with care given to cross-walking the syntax for users of other SEM programs (e.g., LISREL, EQS).