Interpersonal theories offer systematic and broad-based approaches to understanding human functioning. These theories have yet to be applied to therapeutic recreation. In the current article, an introduction to the field of interpersonal theories and its application to therapeutic recreation practices are given, with a specific focus on group treatments. Four key principles of the interpersonal approach are outlined, providing an integration of concepts from several theorists. A case scenario is provided to highlight the potential utilization of this approach in treatment. Recommended assessment instruments and resources for further learning are also provided. [PUBLICATION ABSTRACT]