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Acceptance and Commitment Therapy

Also known as: ACT, third-wave therapy

OriginatorSteven C. HayesYear1999Sources2Related methods7

Acceptance and Commitment Therapy (ACT) is a values-based, process-oriented psychotherapy developed by Steven C. Hayes and colleagues that helps individuals create meaningful lives while living with difficult thoughts, feelings, and sensations. Using mindfulness, values clarification, and behavioral commitment, ACT represents a third-wave approach to cognitive-behavioral therapy and has demonstrated effectiveness across diverse psychological problems.

Key highlights

  • Empirically supported across diverse disorders (anxiety, depression, chronic pain, OCD, PTSD)
  • Addresses psychological flexibility and values alignment, promoting meaningful life change beyond symptom reduction
  • Compatible with diverse populations and cultural values systems
  • Accessible through brief interventions or longer treatment; flexible delivery
  • Reduces therapist and client focus on symptom elimination, decreasing struggle and experiential avoidance

Intuition

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How it works

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When to use it

ACT is appropriate for mood, anxiety, trauma, chronic pain, and behavioral disorders where avoidance or experiential struggle maintains the problem. It is particularly valuable when clients are stuck in symptom-focused change efforts or when symptoms are difficult to eliminate. ACT works best for clients with adequate insight, some motivation for values clarification, and willingness to tolerate discomfort.

Strengths & limitations

Strengths
  • Empirically supported across diverse disorders (anxiety, depression, chronic pain, OCD, PTSD)
  • Addresses psychological flexibility and values alignment, promoting meaningful life change beyond symptom reduction
  • Compatible with diverse populations and cultural values systems
  • Accessible through brief interventions or longer treatment; flexible delivery
  • Reduces therapist and client focus on symptom elimination, decreasing struggle and experiential avoidance
Limitations
  • Conceptual complexity; clients must grasp acceptance and paradox, which some find counterintuitive
  • Requires clinician expertise in metaphor, experiential exercises, and values clarification
  • Limited evidence for severe acute conditions (acute crisis, psychosis) requiring immediate intervention
  • Values clarification can be emotionally challenging, requiring adequate stabilization beforehand
  • Some clients misinterpret acceptance as passive resignation or giving up

Common pitfalls

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Applications

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Frequently asked

Does acceptance mean I have to be happy with my problems?

No. Acceptance means willingness to experience difficult thoughts and feelings without struggling against them. It is not resignation; rather, it frees energy for valued action despite discomfort.

Is ACT similar to mindfulness or meditation?

ACT uses mindfulness skills but extends beyond meditation to emphasize values clarification and behavioral commitment. Mindfulness is a component, not the entire approach.

How is ACT different from CBT?

CBT focuses on changing thoughts and reducing symptoms; ACT focuses on changing the relationship to thoughts and increasing values-aligned action. Both are evidence-based but have different targets.

How long does ACT treatment take?

ACT can be delivered in brief interventions (one to a few sessions) or ongoing therapy (12+ sessions). Duration depends on problem complexity and treatment goals.

Sources

  1. 1.
    Hayes, S. C., Luoma, J. B., Bond, F. W., Masuda, A., & Lillis, J. (2006). Acceptance and commitment therapy: Model, processes, and outcomes. Behaviour Research and Therapy, 44(1), 1–25.
    DOI 10.1016/j.brat.2005.06.006
  2. 2.
    Hayes, S. C., Strosahl, K. D., & Wilson, K. G. (2012). Acceptance and commitment therapy: The process and practice of mindful change (2nd ed.). Guilford Press.
    ISBN 9781609189624

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ScholarGate. (2026, June 3). Acceptance and Commitment Therapy. ScholarGate. https://scholargate.app/clinical-psychology/acceptance-commitment-therapy

Acceptance and Commitment Therapy | ScholarGate