Item response theory analysis of Working Alliance Inventory, revised response format, and new Brief Alliance Inventory.
In: Psychotherapy research : journal of the Society for Psychotherapy Research, Jg. 26 (2016-11-01), Heft 6, S. 694-718
academicJournal
Zugriff:
Objective: 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 the client version may have psychometric problems. This study used Rasch item response theory (IRT) to (a) improve WAI response format, (b) compare two brief 12-item versions (WAI-sr; WAI-s), and (c) develop a new 16-item Brief Alliance Inventory (BAI).
Method: Archival data from 1786 counseling center and community clients were analyzed.
Results: IRT findings suggested problems with crossed category thresholds. A rescoring scheme that combines neighboring responses to create 5- and 4-point scales sharply reduced these problems. Although subscale variance was reduced by 11-26%, rescoring yielded improved reliability and generally higher correlations with therapy process (session depth and smoothness) and outcome measures (residual gain symptom improvement). The 16-item BAI was designed to maximize "bandwidth" of item difficulty and preserve a broader range of WAI sensitivity than WAI-s or WAI-sr.
Conclusions: Comparisons suggest the BAI performed better in several respects than the WAI-s or WAI-sr and equivalent to the full WAI on several performance indicators.
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Item response theory analysis of Working Alliance Inventory, revised response format, and new Brief Alliance Inventory.
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Autor/in / Beteiligte Person: | Mallinckrodt, B ; Tekie, YT |
Zeitschrift: | Psychotherapy research : journal of the Society for Psychotherapy Research, Jg. 26 (2016-11-01), Heft 6, S. 694-718 |
Veröffentlichung: | 2005- : London : Routledge ; <i>Original Publication</i>: New York, NY, USA : Guilford Publications, [1991-, 2016 |
Medientyp: | academicJournal |
ISSN: | 1468-4381 (electronic) |
DOI: | 10.1080/10503307.2015.1061718 |
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