Comparer des méthodes

	Questionnaire sur les facteurs communs	Formulaire des aspects utiles de la thérapie
Domaine	Recherche en psychothérapie	Recherche en psychothérapie
Famille	Process / pipeline	Process / pipeline
Année d'origine	1992	1988
Auteur d'origine	Michael J. Lambert, Bruce E. Wampold	Sara P. Llewellyn; Robert Elliott
Type	Client-rated	Client-rated
Source fondatrice	Lambert, M. J., & Barley, D. E. (2001). Research summary on the therapeutic relationship and psychotherapy outcome. Psychotherapy: Theory, Research, Practice, Training, 38(4), 357–361.	Llewellyn, S. P., Foo, S., & Stam, H. J. (1988). Assessing psychotherapy outcome: Clients' perspectives. Canadian Journal of Counselling, 22(2), 191–206.
Alias	CFQ, Therapeutic Factors Scale	HAT, Helpful Aspects Questionnaire
Apparentées	4	4
Résumé	The Common Factors Questionnaire (CFQ) is a structured client-report measure that quantifies the client's perception of therapeutic factors deemed common to effective psychotherapy across all modalities—including alliance, therapist empathy, client agency, goal clarity, and emotional expression. Based on Lambert's contextual model and Wampold's therapeutic relationship framework, the CFQ operationalizes the empirical finding that 70% or more of therapy outcome variance is attributable to common factors (relationship, expectancy, therapeutic environment) rather than specific technique. It is used in research to examine mechanisms of change and to compare common factors across therapy types.	The Helpful Aspects of Therapy (HAT) form is a semi-structured client feedback instrument designed to capture the client's perception of what was most beneficial or helpful in a therapy session or course of treatment. Developed by Llewellyn and refined by Elliott, the HAT combines open-ended narrative response with structured rating scales, enabling rich qualitative insight alongside quantitative comparison. It is used in qualitative outcome research and clinical feedback systems to understand mechanisms of change from the client's perspective.