Differentiation of Self: A Validation Study of the Bowen Theory Construct

The Differentiation of Self Inventory—Revised (DSI-R; Skowron & Schmitt, 2003, “Assessing interpersonal fusion: Reliability and validity of a new DSI fusion with others subscale,” Journal of Marital and Family Therapy, 29, 209–222) assesses a central construct of Murray Bowen’s Family Systems Theory. Differentiation of self (DoS) consists of both intraand interpersonal dimensions, or the capacities for affect regulation and negotiating relational separateness and togetherness. In this study we examined the internal and external structure of the DSI-R with a sample of 749 university students. Confirmatory factor analysis supported a three-factor, first-order solution and offered evidence for a two-dimensional higher-order structure of DoS. The three factors exhibited acceptable reliability and demonstrated theoretically consistent associations with parentification and mental health symptoms. The results confirm the use of the DSI-R as a psychometrically sound measure of DoS. Implications for future research and clinical practice are addressed.