As methods for measuring the relationship between personality and behavior have become more sophisticated, so too has the interest in better explaining the role that environments play in this relationship. Recent efforts have been made to clarify the hypothesized moderating role of environments on this relationship and Cooper and Withey (2009), in particular, have provided evidence for the paucity of empirical research that explains the ways in which strong and weak situations may differentially affect the relationship between personality and behavior. They contend, through a thorough review of the literature, that the intuitive nature of the theory provides promise and that there is likely some substantive basis for the assertion that environmental strength should moderate the relationship between personality and theoretically relevant behaviors. The current study was designed to test the moderating influence of interpersonal environment on the relationship between interpersonal personality and interpersonal behavior, specifically whether the evidence exists for the hypothesis that moderation differentially exists for strong and weak environments. No evidence was provided for the moderating role of environments. Evidence was provided for the predictive utility of traits in all models.