Comparar métodos

	Escala de Acuerdo Paciente-Terapeuta	Inventario de Alianza Terapéutica
Campo	Investigación en psicoterapia	Investigación en psicoterapia
Familia	Process / pipeline	Process / pipeline
Año de origen	1965	1989
Autor original	Edward H. Nash, Robert Hoehn-Saric	Adam O. Horvath & Leslie S. Greenberg
Tipo	Client/Therapist-rated	Therapist/Client-rated
Fuente seminal	Nash, E. H., Hoehn-Saric, R., Battle, C. C., Stone, A. R., Imber, S. D., & Frank, J. D. (1965). Systemic preparation of patients for psychotherapy: Effects on therapy behavior and outcome. Journal of Psychiatric Research, 2(4), 267–281.	Horvath, A. O., & Greenberg, L. S. (1989). Development and validation of the Working Alliance Inventory. Journal of Counseling Psychology, 36(2), 223–233.
Alias	PTAS, Goal Agreement Scale	WAI, WAI-36, WAI-SF, WAI-SR
Relacionados	4	4
Resumen	The Patient-Therapist Agreement Scale (PTAS) measures the degree to which client and therapist agree on therapy goals, treatment focus, and expected treatment duration—a core component of the therapeutic alliance. Developed by Nash and colleagues in their foundational study of psychotherapy preparation, the PTAS operationalizes the principle that shared understanding of 'what we're working on and how long it will take' predicts engagement and outcome. It is used primarily in research and training to assess goal alignment and identify mismatches that may undermine treatment.	The Working Alliance Inventory (WAI) is a validated, empirically supported measure of the therapeutic alliance—the collaborative relationship between therapist and client. Developed by Horvath and Greenberg in 1989, the WAI operationalizes Bordin's tripartite model of alliance: agreement on goals, agreement on tasks, and emotional bond. It is one of the most widely used alliance measures in psychotherapy research and is a strong predictor of psychotherapy outcome across diverse theoretical orientations and client populations.