Arbeitsallianz: Evidenzgrad Klasse 1 (beste gesicherte Wirksamkeit, Cohens d = .58)

The alliance in adult psychotherapy: A meta-analytic synthesis.

Question: How robust is the correlation of the alliance (as a holistic, collaborative quality measured during therapy) with therapy outcomes? Findings: Based on over 300 studies, the positive relation of the alliance and outcome remains across assessor perspectives, alliance and outcome measures, treatment approaches, patient (intake-) characteristics, face-to-face and Internet-mediated therapies, and countries. Meaning: The alliance, which is of a mutual collaboration and partnership between therapist and client, is an important aspect of psychotherapy across various psychotherapy approaches. Next Steps: The universality of the alliance–outcome relation and the potential conceptual boundaries have to be investigated across cultural and biopsychosocial contexts inside but also outside of psychotherapeutic settings in a quantitative and in a qualitative manner.