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The Evaluating Methods for Motivational Enhancement Education trial evaluated methods for learning motivational interviewing (MI). Licensed substance abuse professionals (N = 140) were randomized to 5 training conditions: (a) clinical workshop only; (b) workshop plus practice feedback; (c) workshop plus individual coaching sessions; (d) workshop, feedback, and coaching; or (e) a waiting list control group of self-guided training. Audiotaped practice samples were analyzed at baseline, posttraining, and 4, 8, and 12 months later. Relative to controls, the 4 trained groups showed larger gains in proficiency. Coaching and/or feedback also increased posttraining proficiency. After delayed training, the waiting list group showed modest gains in proficiency. Posttraining proficiency was generally well maintained throughout follow-up. Clinician self-reports of MI skillfulness were unrelated to proficiency levels in observed practice.
Miller et al. (2004) studied this question.