ABSTRACT
Because of the importance of self-differentiation in couple therapy and premarital counseling, it is essential to have a suitable tool to measure it. The present study investigates the validity of the Persian translation of Differentiation of Self Inventory (DSI) among Iranian adults. The participants involved 273 people who chose availability (202 males and 82 females). The DSI scale had good enough validity and satisfactory reliability according to face, content, and construct validity test. According to the results of confirmatory factor analysis, 26 items removed because their factor loadings did not meet the criteria and the DSI scale remained as a 17 items questionnaire. Due to the disintegration of factors, exploratory factor (EFA) analysis is used to determine the factors of DSI. The results of EFA supported the four-factor questionnaire, including emotional reactivity, emotional cutoff, I position, and fusion with others.
