The Dimensions of Change in Therapeutic Community Treatment Instrument

Published in: Psychological Assessment, v. 18, no. 1, Mar. 2006, p. 118-122

Posted on RAND.org on January 01, 2006

by Maria Orlando Edelen, Suzanne L. Wenzel, Patricia A. Ebener, Michael C. Edwards, Wallace Mandell, Kirsten Becker

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In this article, the authors describe the refinement and preliminary evaluation of the Dimensions of Change in Therapeutic Community Treatment Instrument (DCI), a measure of treatment process. In Study 1, a 99-item DCI, administered to a cross-sectional sample of substance abuse clients (N = 990), was shortened to 54 items on the basis of results from confirmatory factor analyses and item response theory invariance tests. In Study 2, confirmatory factor analyses of the 54-item DCI, completed by a longitudinal cohort of 993 clients, established and validated an 8-factor solution across 2 subpopulations (adults and adolescents) and 2 time points (treatment entry and 30-days postentry). The results of the 2 studies are encouraging and support use of the 54-item DCI as a tool to measure treatment process.

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