Item response theory analysis of Working Alliance Inventory, revised response format, and new Brief Alliance Inventory

摘要: AbstractObjective: The Working Alliance Inventory (WAI) has made great contributions to psychotherapy research. However, studies suggest the 7-point response format and 3-factor structure of client version may have psychometric problems. This study used Rasch item theory (IRT) (a) improve WAI format, (b) compare two brief 12-item versions (WAI-sr; WAI-s), (c) develop a new 16-item Brief (BAI). Method: Archival data from 1786 counseling center community clients were analyzed. Results: IRT findings suggested problems with crossed category thresholds. A rescoring scheme that combines neighboring responses create 5- 4-point scales sharply reduced these Although subscale variance was by 11–26%, yielded improved reliability generally higher correlations therapy process (session depth smoothness) outcome measures (residual gain symptom improvement). BAI designed maximize “bandwidth” ...