Objective: To review the therapist effects literature since Baldwin and Imel's (2013) review. Method: Systematic literature review of three databases (PsycINFO, PubMed and Web of Science) replicating Baldwin and Imel (2013) search terms. Weighted averages of therapist effects (TEs) were calculated, and a critical narrative review of included studies conducted. Results: Twenty studies met inclusion criteria (3 RCTs; 17 practice-based) with 19 studies using multilevel modeling. TEs were found in 19 studies. The TE range for all studies was 0.2% to 29% (weighted average = 5%). For RCTs, 1%-29% (weighted average = 8.2%). For practice-based studies, 0.2-21% (weighted average = 5%). The university counseling subsample yielded a lower TE (2.4%) than in other groupings (i.e., primary care, mixed clinical settings, and specialist/focused settings). Therapist sample sizes remained lower than recommended, and few studies appeared to be designed specifically as TE studies as opposed to maximising on the availability of large routine patient datasets. Conclusions: Therapist effects are a robust phenomenon although considerable heterogeneity exists across studies. Patient severity appeared related to TE size. TEs from RCTs were highly variable. Using an overall therapist effects statistic may lack precision, and TEs might be better reported separately for specific clinical settings.

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English This article reports on a small-scale enquiry into the value for Japanese social work students of learning about international social work. The study highlights a number of practice-related benefits for students, linking these to contemporary Japanese and UK social work education and practice. French Cet article présente le rapport d’une enquête à échelle restreinte sur les valeurs des étudiants Japonais en travail social qui étudient le travail social international. L’étude souligne nombre d’avantages relatifs à la pratique pour les étudiants, en lien avec la formation et les pratiques de travail social contemporaines japonaises et britanniques. Spanish Este es el reporte de una investigación a pequeña escala sobre el valor que para los estudiantes japoneses de trabajo social tiene el aprender acerca del trabajo social internacional. El estudio subraya primero un número de beneficios relacionados con la práctica que alcanzarán los estudiantes, y después muestra la conexión que existe entre tales beneficios a la práctica y educación del trabajo social contemporáneos en el Japón y en el Reino Unido.

This is a post-peer-review, pre-copy edited version of an article published in Social Work Education.