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Solution-focused Brief Therapy (SFBT) has generated outcome research worldwide and in a variety of intervention contexts. A systematic literature search yielded 251 published outcome studies on SFBT. SFBT was found superior to control groups or at post-test in almost nine out of every ten studies. Taking only 91 randomized controlled trials (RCTs) into account, SFBT was still found superior in seven out of every ten. Results varied slightly according to intervention type and format, manualization, and components of SFBT. They also varied more according to type of comparator and use of diagnostic criteria. These results widen the evidence base for SFBT.
López et al. (2022) studied this question.