Patient-Therapist Agreement Scale
Patient-Therapist Agreement Scale (PTAS) · Also known as: PTAS, Goal Agreement Scale
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.
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When to use it
The PTAS is used in: (1) pre-treatment or early-treatment assessment (session 1–3) to detect goal misalignment and negotiate agreement; (2) therapist training to teach goal-setting and expectancy management; (3) research examining whether goal agreement predicts outcome or dropout; (4) quality improvement in clinics (audit goal agreement as a process metric); (5) studies of psychotherapy preparation or pre-session homework (does pre-session goal-setting improve PTAS agreement?); (6) dropout/retention research (do clients with low goal agreement drop out sooner?). Applicable across therapy modalities and populations. Particularly important in brief therapy where time is limited, and in mandatory/involuntary clients where resistance is high (goal misalignment is common).
Strengths & limitations
- Directly targets a core alliance component: shared goals. Bordin's alliance model includes goal agreement; PTAS operationalizes this.
- Early warning system: administered in early sessions, misalignment is detected before weeks are invested in the wrong direction.
- Feasible: brief, low-burden measure; can be administered at intake without disrupting clinical flow.
- Actionable: results immediately inform supervision/clinical discussion. If disagreement is found, therapist and client can renegotiate.
- Predictive: goal agreement predicts engagement, retention, and outcome across therapy types.
- Transdiagnostic: applicable to any diagnosis or life problem; neutral on theoretical orientation.
- Measurement complexity: comparing open-ended client/therapist descriptions of goals requires coding and inter-rater reliability checks; not as simple as scoring a questionnaire.
- Implicit vs. explicit goals: clients and therapists may have unspoken or partially conscious goals; PTAS captures stated goals only.
- Goals evolve: early-session PTAS may not reflect mid-treatment refinement of goals; may need to readminister.
- Power differential: clients may agree with therapist's goal-framing due to authority or reluctance to disagree; stated agreement ≠ genuine alignment.
- Therapist variability: some therapists are skilled goal-negotiators; others impose agendas. PTAS reveals outcome, not therapist skill in the process.
- Limited construct validation: far fewer published validation studies than WAI or SRS.
- Context matters: PTAS in a mandatory setting (court-referred, parental referral) looks very different than in voluntary therapy; same low score may indicate different clinical issues.
Frequently asked
What should I do if client and therapist goals disagree?
Discuss openly and collaboratively. Example: 'I heard that you want to feel happier overall, and I was thinking we should focus on reducing your anxiety in social situations. Those aren't opposed—reducing anxiety will likely make you happier. But I want to make sure we're on the same page. Which feels more important to start with?' Negotiate and document the agreed-upon primary goal. Sometimes you integrate both; sometimes one takes priority initially.
Is it bad if client and therapist expect different treatment durations?
Yes, if the difference is large (client expects 2 sessions, therapist expects 20). Use it as a learning opportunity: 'You mentioned you expected a couple of sessions. What made you think that? And I'm thinking we might need longer because of X—let's discuss what's realistic.' Manage expectations early; if duration mismatch exists, it will emerge as dissatisfaction later.
Should I administer PTAS every session?
No. Administer at intake/early sessions (1–3) to set baseline. Readminister at mid-point (e.g., session 6–8) to check whether goals are still aligned or have evolved. Post-treatment PTAS can assess whether accomplished goals match initial agreement. Over-measuring (every session) is burdensome; early and mid-point are sufficient.
What if client gives vague goals ('I just want to feel better') and therapist has specific diagnostic formulation?
Both are valid. The client's vague goal is accurate to their experience (they know something is wrong, not exactly what). Therapist's specific goal (reduce depressive symptoms, increase behavioral activation) is more actionable. Bridge the gap: 'When you feel better, what would that look like? What would you be doing differently?' Help the client articulate concrete markers, and link them to your case formulation.
Does PTAS agreement predict outcome?
Research suggests yes: goal agreement correlates with engagement, retention, and symptom improvement in several studies, though effect sizes vary. However, goal agreement is not deterministic; other factors (therapist skill, client motivation, life context) also matter. Use PTAS to optimize alliance, but don't over-promise: high PTAS doesn't guarantee good outcome, and low PTAS doesn't doom it—it's a risk factor, not a predictor.
Sources
- 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. link ↗
- Gelso, C. J., & Carter, J. A. (1985). The relationship in counseling and psychotherapy: Components, consequences, and theoretical antecedents. The Counseling Psychologist, 13(2), 155–243. DOI: 10.1177/0011000085132001 ↗
How to cite this page
ScholarGate. (2026, June 3). Patient-Therapist Agreement Scale (PTAS). ScholarGate. https://scholargate.app/en/psychotherapy-research/patient-therapist-agreement
Which method?
Set this method beside its closest kin and read them side by side — the library lays the books on the table; the choice is yours.
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