Acceptance and Commitment Therapy (ACT)

Discover how Acceptance and Commitment Therapy helps you accept thoughts and feelings while living a life guided by your values and purpose.

Acceptance and Commitment Therapy (ACT, pronounced as one word "act") is an evidence-based psychological intervention that uses acceptance and mindfulness strategies, together with commitment and behavior change techniques, to increase psychological flexibility. Unlike traditional cognitive behavioral approaches that focus on changing or eliminating unwanted thoughts and feelings, ACT teaches people to accept these experiences as a natural part of being human while committing to actions that align with their personal values.


At its core, ACT is based on the principle that psychological suffering often stems from attempts to control or avoid difficult thoughts and emotions. By learning to accept rather than struggle with these inner experiences, people can redirect their energy toward living a meaningful life guided by their deepest values, even in the presence of pain.


The History and Development of ACT

Acceptance and Commitment Therapy was developed in the 1980s by psychologist Steven C. Hayes, a professor at the University of Nevada. The development of ACT stemmed partly from Hayes's personal struggle with panic attacks and anxiety. Through his own experiences, he came to understand that trying to control or eliminate difficult thoughts and feelings often made them stronger and more distressing.


ACT emerged as part of what's known as the "third wave" of behavioral therapies, following traditional behavior therapy and cognitive behavioral therapy (CBT). While it shares some elements with CBT, ACT differs in its philosophical underpinnings and its emphasis on acceptance rather than change of internal experiences.


Over the decades, ACT has grown from a theoretical framework into a well-researched therapeutic approach with applications extending beyond mental health to areas such as workplace performance, sports psychology, and chronic pain management. The development of ACT continues to evolve through ongoing research and clinical practice, with a strong emphasis on scientific evidence and practical effectiveness.


How ACT Works

The Six Core Processes

ACT focuses on developing psychological flexibility through six interconnected processes:

  1. Acceptance: Learning to embrace thoughts and feelings without struggling to change or eliminate them. Rather than avoiding discomfort, acceptance involves making room for painful emotions, urges, and sensations, recognizing them as a normal part of living.

  2. Cognitive Defusion: Creating distance from troubling thoughts by observing them without becoming entangled or fused with them. This involves recognizing that thoughts are just thoughts—not necessarily truths—and learning to watch them come and go without being controlled by them.

  3. Being Present: Developing ongoing, non-judgmental contact with psychological and environmental events as they occur. This mindfulness practice helps people stay connected to the here and now rather than getting caught up in worries about the future or ruminations about the past.

  4. Self as Context: Gaining perspective on one's experiences and recognizing the difference between the content of one's thoughts and the "self" that observes them. This "observer self" provides a consistent perspective from which to experience life events without being defined by them.

  5. Values: Identifying what truly matters in one's life across various domains such as relationships, career, personal growth, and health. Values serve as a compass for directing meaningful action.

  6. Committed Action: Taking effective steps guided by one's values, even when doing so brings up difficult thoughts and feelings. This involves setting goals, developing action plans, and persisting in behavior change despite obstacles.


Typical Therapeutic Techniques

ACT therapists employ a variety of experiential exercises, metaphors, and mindfulness practices to help clients develop psychological flexibility. Some common techniques include:

Mindfulness exercises help clients develop present-moment awareness and observe their thoughts and feelings without judgment. These may include focused breathing, body scans, or guided meditations.


Metaphors are used extensively in ACT to illustrate psychological concepts in accessible ways. For example, the "passengers on the bus" metaphor portrays unwanted thoughts as difficult passengers that you can acknowledge while still driving the bus in your chosen direction.


Experiential exercises encourage clients to directly experience the processes being taught rather than just talking about them. For instance, a therapist might guide a client through an exercise where they visualize placing distressing thoughts on leaves floating down a stream to practice cognitive defusion.


Values clarification activities help clients identify and prioritize what truly matters to them. These might include structured worksheets, guided reflections, or creative exercises that explore various life domains.


Behavioral commitment strategies assist clients in translating values into concrete, achievable goals and actions. This often involves developing specific plans, overcoming barriers, and building accountability.


Throughout therapy, these techniques are tailored to the individual's unique circumstances, challenges, and values, creating a personalized approach to developing psychological flexibility.


Conditions Effectively Treated with ACT

Mental Health Conditions

Acceptance and Commitment Therapy (ACT) has been recognized by the American Psychological Association as an evidence-based treatment for several mental health conditions. Research demonstrates ACT's effectiveness for depression, helping individuals accept difficult emotions while engaging in value-guided activities that break cycles of withdrawal and inactivity.


Similarly, for anxiety disorders including generalized anxiety, social anxiety, and panic disorder, ACT teaches people to make room for anxiety rather than fighting it, while pursuing meaningful life activities despite anxious feelings. ACT has also shown effectiveness for obsessive-compulsive disorder (OCD), helping individuals develop a new relationship with obsessive thoughts and resist compulsive behaviors by accepting discomfort and redirecting energy toward valued actions.


Further research supports ACT's application for post-traumatic stress disorder (PTSD), where it addresses avoidance behaviors and helps individuals make room for difficult memories while reconnecting with what matters in their present lives. For substance use disorders, ACT provides skills for managing cravings without acting on them and helps individuals clarify values that can motivate recovery efforts.


Additionally, ACT has shown promise in treating psychosis, helping people relate differently to psychotic experiences, which has been associated with reducing distress and hospitalization rates.


Physical Health Conditions

ACT has also demonstrated effectiveness as a supportive approach for managing various physical health conditions:

Chronic pain: One of ACT's most well-established applications, helping individuals accept pain sensations while reducing pain-related disability and improving quality of life through chronic pain management.


Diabetes management: ACT can help with the psychological aspects of diabetes self-care, including acceptance of the diagnosis and commitment to necessary health behaviors.


Weight management: ACT addresses psychological barriers to healthy eating and physical activity by focusing on values rather than short-term comfort.


Cancer: ACT helps patients cope with the emotional challenges of diagnosis and treatment while continuing to live meaningfully despite uncertainty.


Other Applications

ACT's versatility extends to other areas of life and functioning:

Workplace stress and burnout: ACT-based interventions have shown effectiveness in reducing workplace stress and increasing psychological flexibility in professional settings, which can be particularly helpful for executives.


Academic performance: ACT can help students manage test anxiety and stay committed to educational goals despite obstacles.


Athletic performance: ACT principles are increasingly applied in sports psychology to help athletes perform at their best while managing performance anxiety.


Parenting challenges: ACT-based parenting programs help parents clarify their values around raising children and respond effectively to parenting stress, which can be integrated into family therapy.


Evidence Supporting ACT

The efficacy of Acceptance and Commitment Therapy is supported by a substantial and growing body of research. Multiple meta-analyses have shown that ACT is effective for treating a wide range of conditions, with medium to large effect sizes compared to treatment as usual.


A comprehensive review of ACT research published in the Journal of Contextual Behavioral Science found that ACT interventions consistently outperform wait-list controls and show comparable or superior outcomes to established treatments for many conditions. The research indicates ACT is particularly effective for chronic pain, depression, anxiety disorders, and substance use disorders.


ACT's effectiveness appears to be mediated through increased psychological flexibility, supporting the theoretical framework behind the approach. Studies measuring psychological flexibility before and after ACT interventions show that improvements in flexibility correlate with better clinical outcomes, suggesting that the therapy works through its proposed mechanisms.


The World Health Organization has recognized the value of ACT-based approaches, recently releasing an ACT-based self-help course called "Self-Help Plus" for people living through adversity, which has been validated in multiple randomized controlled trials.


As of 2023, there were more than 1,000 randomized controlled trials examining ACT across diverse populations and conditions, making it one of the most extensively researched modern psychotherapies.


Typical Duration and Frequency of Treatment

ACT can be delivered in various formats and timeframes, allowing for flexibility in treatment planning based on individual needs and circumstances. Standard individual therapy typically involves weekly sessions of 45-60 minutes. A full course of ACT may range from 8-16 sessions for many conditions, though this can vary based on complexity and treatment goals.


Brief interventions can be effective for specific issues, with some research showing benefits from as few as 4-6 sessions. Even single-session ACT workshops have shown positive effects for targeted concerns. Group therapy formats often follow a structured protocol of 8-12 weekly sessions lasting 90-120 minutes each. These can be particularly cost-effective while providing the added benefit of peer support and shared learning.


Self-help and digital interventions based on ACT principles are increasingly available, ranging from self-paced workbooks to smartphone applications and online courses. These may be used as standalone interventions or as supplements to face-to-face therapy.


For chronic or complex conditions, longer-term ACT may be beneficial, with an initial intensive phase followed by less frequent maintenance sessions. The flexible nature of ACT allows for tailoring treatment duration to individual progress and needs rather than adhering to a rigid timeline.


Is ACT Right for You?

Signs ACT Might Be Beneficial

ACT might be particularly helpful if you:

  • Find yourself caught in patterns of avoiding uncomfortable thoughts, feelings, or situations

  • Struggle with persistent negative thoughts or self-criticism that traditional approaches haven't helped

  • Feel stuck or unsure about your direction or purpose in life

  • Have tried changing difficult thoughts or feelings without success

  • Experience chronic pain or health conditions that require adaptation

  • Want to develop greater mindfulness and present-moment awareness

  • Are interested in clarifying your values and living more consistently with them

  • Have had limited success with more traditional cognitive-behavioral approaches


Finding the Right Approach for Your Situation

While ACT offers a versatile framework applicable to many concerns, individual factors should be considered when determining if it's the right approach for your specific situation:

Treatment goals: ACT focuses on increasing valued living and psychological flexibility rather than eliminating symptoms. If your primary goal is symptom reduction, ACT might be used alongside other approaches.


Personal preferences: Some people resonate strongly with ACT's philosophical approach and metaphorical style, while others may prefer more directive or structured interventions.


Cultural considerations: ACT's emphasis on acceptance and values can be adapted to diverse cultural contexts, but it's important to work with a therapist who respects and incorporates your cultural background.


Treatment history: Your previous experiences with therapy may inform whether ACT would offer a fresh perspective or build on approaches that have already been helpful.


A qualified mental health professional can help assess whether ACT would be appropriate for your specific circumstances, possibly as part of an initial consultation or evaluation session.


Finding Qualified ACT Providers

Professional Qualifications to Look For

When seeking an ACT therapist, consider the following qualifications:

  • Professional licensing as a mental health provider (psychologist, social worker, counselor, etc.)

  • Specific training in ACT through workshops, courses, or certification programs

  • Supervision or consultation with experienced ACT practitioners

  • Familiarity with the research supporting ACT for your specific concerns

  • Commitment to ongoing professional development in ACT principles and techniques


The Association for Contextual Behavioral Science (ACBS), the professional organization most closely affiliated with ACT, offers a peer-reviewed ACT therapist certification program, though many qualified practitioners may not have pursued this specific credential.


How to Find Providers Who Offer ACT

Ready to explore Acceptance and Commitment Therapy? Browse our directory of treatment centers to find qualified ACT providers who can help you develop psychological flexibility and live more fully according to your values.


References

  1. American Psychological Association. (2023). Recognition of Acceptance and Commitment Therapy as an empirically supported treatment. https://www.apa.org/divisions/div12/psychological-treatments

  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. URL: https://www.guilford.com/books/Acceptance-and-Commitment-Therapy/Hayes-Strosahl-Wilson/9781462528943

  3. A-Tjak, J. G., Davis, M. L., Morina, N., Powers, M. B., Smits, J. A., & Emmelkamp, P. M. (2021). A meta-analysis of the efficacy of acceptance and commitment therapy for clinically relevant mental and physical health problems. Psychotherapy and Psychosomatics, 90(2), 102-112. https://pubmed.ncbi.nlm.nih.gov/25547522/

  4. Levin, M. E., Krafft, J., & Twohig, M. P. (2023). Examining the evidence base for acceptance and commitment therapy: A systematic review of meta-analyses. Journal of Contextual Behavioral Science, 28, 1-12. https://pubmed.ncbi.nlm.nih.gov/38724128/

  5. Harris, R. (2019). ACT made simple: An easy-to-read primer on acceptance and commitment therapy (2nd ed.). New Harbinger Publications. https://www.newharbinger.com/9781684033010/act-made-simple/