The Differentiation of Self Inventory: Development and Initial Validation

Despite the importance of Bowen theory (M. Bowen, 1976, 1978; M. E. Kerr & Bowen, 1988) in the field of family therapy, there have been relatively few studies to date examining its constructs or propositions. To fill this gap, a self-report instrument, the Differentiation of Self Inventory (DSI) has been developed. The DSI is a multidimensional measure of differentiation that focuses specifically on adults (age 25+), their significant relationships, and current relations with family of origin. Six-hundred and nine adults participated in a series of 3 studies, in which DSI scores - reflecting less emotional reactivity, cutoff, and fusion with others, and a greater ability to take an "I position" - predicted lower chronic anxiety, better psychological adjustment, and greater marital satisfaction. Other results consistent with Bowen theory are discussed, along with the potential contribution of the DSI for testing Bowen theory, as a clinical assessment tool, and as an indicator of psychotherapeutic outcome.