Differentiation of self worksheet 2025

The document presents a dissertation by Joseph Rico Drake on the creation and initial evidence of construct validity for the Differentiation of Self Inventory - Short Form (DSI-SF). The study aimed to enhance the efficiency of the original Differentiation of Self Inventory (DSI) by reducing its length while maintaining reliability across its four subscales. Three studies were conducted: the first focused on developing the DSI-SF using Item Response Theory, the second assessed its construct and criterion validity in relation to psychological constructs like depression and anxiety, and the third evaluated its test-retest reliability. Results indicated that the DSI-SF retains strong internal consistency and demonstrates significant relationships with measures of psychological distress and self-esteem, although concerns about structural validity were noted. The findings suggest that the DSI-SF is a valuable tool for research in differentiation of self within college student populations.