Common factors and the contextual model
The finding that unsettles every school equally, and what it does not establish.
Rosenzweig proposed in 1936 that all psychotherapies work through shared factors, quoting the Dodo bird from Alice in Wonderland: "Everybody has won, and all must have prizes." Luborsky revived it in 1975; Wampold has argued it in detail since. It remains the field’s central unresolved dispute.
Frank’s four factors
- 1An emotionally charged, confiding relationship with a helping person
- 2A healing setting carrying the expectation of help
- 3A rationale, conceptual scheme or myth providing a plausible explanation and a procedure
- 4A ritual requiring active participation from both, believed by both to be the means of restoring health
Wampold’s three pathways
| Pathway | Mechanism |
|---|---|
| The real relationship | A genuine human connection, valuable in itself |
| Expectations | A plausible explanation and treatment creating the belief that things can improve |
| Specific ingredients | Enacting health-promoting actions — which do matter, but as one pathway among three |
What the verdict does and does not claim
Supported
- Bona fide therapies produce similar outcomes for most common presentations
- Alliance, empathy and expectation predict outcome across orientations
- Therapist effects (5–8% of variance) exceed treatment effects (~1%)
- Allegiance effects are substantial in comparative trials
Not supported
- That technique is irrelevant
- That any treatment works for any condition
- That specific treatments never outperform — they do, for OCD, PTSD, phobia and adolescent anorexia
- That training in specific methods is unnecessary
Sources
Wampold, B. E., & Imel, Z. E. (2015). The Great Psychotherapy Debate (2nd ed.). Routledge
bookLaska, K. M., Gurman, A. S., & Wampold, B. E. (2014). Expanding the lens of evidence-based practice in psychotherapy: A common factors perspective. Psychotherapy, 51(4), 467–481
articleRosenzweig, S. (1936). Some implicit common factors in diverse methods of psychotherapy. American Journal of Orthopsychiatry, 6(3), 412–415
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