Common Factors
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A figure illustrating what meta-analytic research suggests about the factors running across all therapies that account for change in psychotherapy. From On Becoming a Better Therapist, 2nd Edition by Barry Duncan published by APA (2014).
Common Factors
- 1. Client/Life Factors (86%) (includes unexplained and error variance) Treatment Effects 14% Feedback Effects 21-42% Alliance Effects 36-50% Model/Technique: Specific Effects (Model Differences) 7% Model/Technique: General Effects (Rationale & Ritual), Client Expectancy (Placebo), & Therapist Allegiance 28-?% Therapist Effects 36-57% Duncan, B. (2014). On Becoming a Better Therapist, 2nd ed. Washington, DC: APA