A meta-analysis of common factor and specific treatment effects across the outcome domains of the phase model of psychotherapy

Author(s): Hynan, M. T., Allen, M.

Journal/Book: Clin Psychol Sci Practice. 2000; 7: Journals Dept, 2001 Evans Rd, Cary, NC 27513, USA. Oxford Univ Press Inc. 273-290.

Abstract: A meta-analysis was conducted to determine whether the relative magnitude of common factor and specific treatment effects was related to the classes of outcome domain (subjective well-being, symptoms, and life functioning) described in Howard, Lueger, Maling, and Martinovitch's 1993 phase model of psychotherapy. Effect sizes were calculated for 80 outcome studies that each contained no-treatment, common factor, and treatment groups. Contrary to hypotheses, the magnitude of both (a) common factor versus no-treatment comparisons (r = .11) and (b) common factor versus specific treatment comparisons (r = .19) did not differ across domains. The magnitude of both components of psychotherapy was consistent across a variety of variables. A notable exception was the lack of significant common factor effects in the treatment of more revere disorders.

Note: Review Hynan MT, Univ Wisconsin, Dept Psychol, POB 413, Milwaukee,WI 53201 USA

Keyword(s): psychotherapy meta-analysis; common factor; placebo; specific treatment effects; SELF-STATEMENT MODIFICATION; RATIONAL-EMOTIVE THERAPY; PUBLIC SPEAKING ANXIETY; COGNITIVE THERAPY; BEHAVIOR-THERAPY; TENSION HEADACHE; SPEECH ANXIETY; TRAIT ANXIETY; PHARMACOLOGICAL TREATMENT; NONSPECIFIC FACTORS

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