Title: Therapist effects on treatment outcome in psychotherapy : a multilevel modelling analysis
Authors : Berglar, Jessica
Crameri, Aureliano
von Wyl, Agnes
Koemeda-Lutz, Margrit
Köhler, Miriam
Staczan, Pia
Schulthess, Peter
Tschuschke, Volker
Published in : International Journal of Psychotherapy
Volume(Issue) : 20
Issue : 2
Pages : 61
Pages to: 80
Publisher / Ed. Institution : The European Association for Psychotherapy
Issue Date: Jul-2016
License (according to publishing contract) : Not specified
Type of review: Peer review (Publication)
Language : English
Subjects : Effect of psychotherapist; Process-outcome research; Treatment outcome in psychotherapy
Subject (DDC) : 616.89: Mental disorders, clinical psychology and psychiatry
Abstract: Objectives: This study investigated specific and nonspecific therapeutic factors by focusing on therapist effects on treatment outcome. Methods: Psychotherapists (n = 68) from 10 types of psychotherapy treating 237 patients in an effectiveness study were investigated with regard to their contribution to treatment outcome. Factor scores from a factor analysis of the change scores in all outcome measures were cluster analysed in order to generate clusters of differently effective therapists. Results: Two clusters of differently effective therapists emerged. A fixed effects model revealed a significant impact of differential therapist effectiveness on treatment outcome. In addition to therapists’ differential effectiveness, also nonspecific factors such as patients severity of psychological problems predicted treatment outcome significantly. Treatment concepts did not impact therapists’ effectiveness. Conclusions: The results of this study support the view that there are differently effective therapists, but that patient characteristics also contribute significantly to the course of a psychotherapeutic treatment, independently of therapist.
Departement: Angewandte Psychologie
Organisational Unit: Psychological Institute (PI)
Publication type: Article in scientific Journal
ISSN: 1356-9082
URI: https://digitalcollection.zhaw.ch/handle/11475/3307
Appears in Collections:Publikationen Angewandte Psychologie

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