Acceptance and Commitment Therapy (ACT, pronounced as one word) is a contextual behavioral approach aimed at developing psychological flexibility: the capacity to be fully present in the current moment and act in the direction of one's values, even in the presence of pain, fear and discomfort.
Steven C. Hayes (born 1948) is an American psychologist and professor at the University of Nevada, Reno. His personal experience with panic disorder became a catalyst for the creation of ACT: standard cognitive techniques for controlling thoughts paradoxically increased his anxiety. Hayes concluded that the problem was not the content of thoughts, but the attempt to control them.
In the late 1980s Hayes, together with Kirk Strosahl and Kelly Wilson, began developing the approach, initially called Comprehensive Distancing. By 1999 the model had formed into a full therapeutic approach and received the name ACT. The first foundational textbook was published in 1999.
The philosophical and scientific basis of ACT:
ACT belongs to the "third wave" of behavioral therapies, together with DBT (Linehan), MBCT (Segal, Teasdale, Williams) and CFT (Gilbert).
Key popularizers of ACT include:
The central ACT model is a set of six interrelated processes. Developing them is the core of therapy:
1. Acceptance — willingness to experience unpleasant thoughts, feelings and sensations without trying to get rid of them. 2. Cognitive defusion — changing the relationship to thoughts: seeing thoughts as thoughts, not as facts. 3. Contact with the present moment — mindful presence here and now. 4. Self-as-context — the observing self, the space in which all experiences occur rather than the content of those experiences. 5. Values — chosen life directions, what truly matters to the person. 6. Committed action — concrete steps in the direction of values.
The six processes form three pairs: Openness (acceptance + defusion), Awareness (present moment + self-as-context), and Engagement (values + action).
Psychological flexibility is the central construct in ACT and the main mechanism of therapeutic change. It is not a fixed trait, but a skill that can be developed. Its opposite is psychological rigidity: attempts to control inner experience, fusion with thoughts, disconnection from values and automatic behavior.
Fusion means that thoughts are experienced as literal reality and begin to control behavior. "I am a failure" is felt not as a thought, but as a fact.
Defusion creates distance between the person and their thoughts. The thought "I am a failure" becomes "I notice that I am having the thought that I am a failure." The content of the thought does not change; the relationship to it changes.
Unlike classic CBT, ACT does not dispute the content of thoughts. It weakens their influence on behavior.
Acceptance is active, mindful willingness to experience unpleasant inner events: thoughts, feelings, sensations and memories, without trying to get rid of them, suppress them or change them. Acceptance is not passive tolerance and not approval. It is a pragmatic choice: struggling with inner experience consumes resources and interferes with movement toward values.
Values are chosen life directions that give life meaning and orientation. Values are not achieved, unlike goals; they are a compass, not a destination. The therapist helps the client clarify values and notice the gap between values and current behavior.
The ability to flexibly direct attention to the here and now: noticing what is happening inside and around, without judgment and without trying to change it. This is not meditation as an end in itself, but a functional skill that allows conscious choice instead of automatic reaction.
An initial ACT strategy: helping the client see that attempts to control, suppress or eliminate unwanted inner experience do not work in the long run, or work at the cost of losing quality of life. This is not despair. It is liberation from a struggle that is not working, and openness to a fundamentally different approach.
ACT actively uses metaphors as a primary way of communicating concepts. Instead of abstract explanations, the therapist invites the client into an experience through metaphors such as Passengers on the Bus, Quicksand, Monsters on the Boat, and exercises such as Leaves on a Stream and Milk, Milk, Milk.
ACT is one of the fastest-growing evidence-based approaches in psychotherapy. By 2024, more than 1000 randomized controlled trials had been registered.
ACT has evidence for depression, anxiety disorders, OCD, PTSD, chronic pain, addictions, eating disorders, cancer-related distress, diabetes and occupational burnout.
A key mediator is improvement in psychological flexibility, which predicts therapeutic change regardless of diagnosis. This supports the transdiagnostic nature of ACT.
ACT is not mainly about making the client feel better. It is about helping the client live a full life, even when life is difficult. Keep this compass.
"Pain is inevitable. Suffering is optional" — Hayes. Your task today is to help the client separate pain from the struggle with pain.
Two blocks, one psychological flexibility. Session structure: check-in -> agenda -> experiential work -> values -> action. Hexaflex: acceptance -> defusion -> mindfulness -> self-as-context -> values -> action.
All six hexaflex processes are intertwined. You do not need to work with every process in every session; follow the client.
✅ ACT is experiential therapy. Less talking "about," more direct experience.
⚠️ Do not turn check-in into a 20-minute conversation. Five minutes is usually enough.
✅ If the client did not do the practice, this is not a failure. It is material: what got in the way?
Barriers to action are a direct path to defusion and acceptance.
✅ Link the agenda to the client's values: "How is this connected to what matters to you?"
All six processes are intertwined. You do not need to work with each of them in every session.
✅ Everything in ACT is tied to values. If you lose direction, return to values.
✅ The action should be concrete, small and linked to a value.
⚠️ Do not assign five tasks. One concrete action is better than five unfinished ones.
✅ The first five minutes build trust. Be warm and open.
⚠️ Do not start with techniques and metaphors. Start with the person.
Safety assessment: suicidal thoughts and self-harm should be asked about directly.
| Say | |
|---|---|
| "We will learn how to live a full life, even when anxiety is present" | |
| "Thoughts are thoughts, not facts" | |
| "You need to act in the direction of what matters" |
This begins creative hopelessness: the client sees that control strategies are not working. Important: this is not despair, but readiness for something new.
Goal: the client sees that strategies for struggling with inner experience are not working.
1. Inventory of control strategies 2. Evaluation of short-term and long-term effectiveness 3. Normalization: "This is not your fault; this is how the mind works" 4. Willingness to try something different
✅ "Creative" because something new can be born from the dead end. This is not about hopelessness.
⚠️ Do not take away all hope. Show that there is an alternative.
Goal: show that attempts to control inner experience intensify suffering.
Control works beautifully in the external world: open a door, fix a tap. With thoughts and feelings, it usually does not.
Goal: learn defusion, acceptance, present-moment contact and self-as-context.
Techniques are described in sections [6]-[11].
Goal: identify what truly matters to the client.
✅ Values are the compass of the whole therapy. Without them, work with defusion and acceptance loses direction.
Goal: translate values into concrete actions.
1. Set goals based on values 2. Small steps and behavioral experiments 3. Work with barriers, returning to defusion and acceptance 4. Failure is not a catastrophe; it is part of the path
✅ Remember: phases overlap. You can return to any of them at any moment in the session.
Psychological flexibility is the capacity to be fully present in the present moment and, depending on the situation, act in the direction of values.
The six processes are not sequential steps. They are simultaneous aspects of the work.
Acceptance is active willingness to experience thoughts, feelings and sensations without trying to control, avoid or suppress them, in order to move toward values.
Opposite: experiential avoidance.
| Acceptance is NOT | Acceptance IS |
|---|---|
| Approval or agreement | Willing contact |
| Passivity or resignation | Active choice |
| Grin-and-bear-it endurance | Making room for feelings |
| Wanting or enjoying | Openness in the service of values |
Quicksand — the more you struggle, the deeper you sink. The solution is to open up and lie on the surface.
Tug of war with the monster — you can drop the rope instead of pulling harder.
Chinese finger trap — the harder you pull, the tighter it grips.
1. Name the feeling — observe like a scientist: shape, color, size, temperature. 2. Breathe into it — direct the breath toward the sensation, create space. 3. Willingness scale — "From 0 to 10, how willing are you to make room for this feeling?" 4. Two dials — one for discomfort, one for willingness. They are independent.
✅ Acceptance is not the goal. The goal is living by values.
⚠️ Do not force acceptance. "You must accept this" is pressure, not acceptance.
Defusion changes the relationship to thoughts. The client sees thoughts as words, sounds and stories, not as facts or commands to act.
Opposite: cognitive fusion, where thoughts are taken literally and guide behavior.
| Technique | How |
|---|---|
| "I am having the thought that." | Add distance: not "I am a failure," but "I am having the thought that I am a failure." |
| Name the story | "Ah, here is the 'nobody loves me' story again." |
| Thank your mind | "Thank you, mind, for that thought. Very creative." |
| Sing the thought | Say the thought in a cartoon voice or to the tune of "Happy Birthday." |
| Word repetition | Repeat a word quickly for 30 seconds until it loses meaning. |
| Leaves on a stream | Put each thought on a leaf and watch it float away. |
| Radio Doom and Gloom | The mind is a radio station broadcasting catastrophes. You can turn down the volume. |
| Passengers on the bus | Thoughts are noisy passengers. You are the driver. Where are you going? |
T: What thought comes up when you think about this? C: That I will not cope. That I am weak. T: Good. Try saying: "I notice that I am having the thought that I am weak." C: (pause) I notice that I am having the thought that I am weak. T: Do you notice a difference? C: Yes. as if it is no longer about me, but about the thought.
✅ The goal of defusion is not to remove the thought, but to loosen its control over behavior.
⚠️ Do not use defusion to invalidate: "It is just a thought" can sound like "this is nonsense."
Present-moment contact is flexible, voluntary attention to what is happening right now, inside and outside.
Opposite: rumination about the past, anxiety about the future, autopilot.
1. Five senses — name 5 things you see, 4 you hear, 3 you feel, 2 you smell, 1 you taste. 2. Mindful breathing — 2-3 minutes of attention to the breath. 3. Grounding — attention to the body's contact with surfaces. 4. Noticing the choice point — "Right now you have a choice. What will you choose?"
✅ Mindfulness is not relaxation. The goal is flexible attention, not calm.
⚠️ Do not turn the session into a 45-minute meditation. Two or three minutes is often enough.
Self-as-context is awareness of the observing self, which notices thoughts, feelings and sensations but is not identical with them. It is the stage on which experience unfolds.
Opposite: self-as-content, identification with stories, roles and labels.
| Metaphor | Core idea |
|---|---|
| Sky and weather | Thoughts and feelings are weather. You are the sky that remains. |
| Chessboard | You are not the pieces; you are the board. |
| House and furniture | Furniture changes; the house remains. |
| Movie screen | The film can be anything. The screen remains unchanged. |
1. Continuous You — meditation: "You were five and observed the world. You were fifteen and observed. Now you are observing. What is unchanged?" 2. Notice the one who notices — shifting from content to observer. 3. Perspective taking — looking from the future or through another person's eyes.
Self-as-context is the most subtle of the six processes. Do not explain too much; let the client experience it through an exercise.
Values are chosen life directions: what kind of person you want to be and what truly matters to you.
Opposite: life on autopilot, by inertia, from fear or by other people's expectations.
| Values | Goals |
|---|---|
| Directions, like "west" | Destinations |
| Process, not outcome | Concrete result |
| Cannot be "completed" | Can be achieved and closed |
| "Be a loving partner" | "Organize dinner on Saturday" |
| "Be healthy" | "Run 5 km" |
| Tool | Description |
|---|---|
| Bull's Eye | A target with 4 sectors: work, leisure, relationships, health. Mark how closely you are living by values. |
| Values cards | Sort cards into "important / not important / very important." |
| VLQ | Ten domains: rate importance and consistency. |
| Epitaph / 80th birthday | "What would you want people to say?" |
| Sweet spot | The intersection of values across domains. |
✅ Values are not rules. They are chosen freely, not imposed.
⚠️ Do not confuse the client's values with your own. Do not judge a value as "right" or "wrong."
Committed action means concrete steps toward values, even when there is discomfort. The key is awareness and commitment.
Opposite: inaction, avoidance, impulsivity.
| Tool | Core idea |
|---|---|
| Choice Point | Visual map: in each moment, a move toward values or away from discomfort. |
| ACT Matrix | Four quadrants: toward what matters / away from discomfort, inside / outside. |
| SMART planning | Concrete goal linked to a value. |
| Action journal | Recording values-based actions. |
1. What matters to you? (value) 2. What pulls you away from the value? (thoughts, feelings, sensations) 3. What do you do when you are pulled away? (away moves, avoidance) 4. What could you do in the direction of the value? (toward moves) 5. What concrete step are you willing to take?
✅ Action does not have to be comfortable. Willingness to have discomfort is part of commitment.
⚠️ Do not set unrealistic goals. "Tomorrow I will stop being afraid" is not an action; it is a fantasy.
A simple tool for assessing the client's willingness to experience uncomfortable sensations, thoughts or feelings in the service of values. In ACT, willingness is not desire or comfort; it is an active choice to stay in contact with inner experience while moving toward what matters. The technique helps shift from "first the pain must go away, then I will live" to "I can live with pain present."
When to use:
Key phrases:
Follow-up questions:
Warnings:
Hayes, S. C. Strosahl, K. D. & Wilson, K. G. (2011). Acceptance and Commitment Therapy
A core ACT acceptance technique. The client learns to create space around an unpleasant bodily sensation: noticing it, allowing it to be there, breathing into it, and not fighting or avoiding it. The emphasis is on breath, imagery and direct contact. The technique changes the relationship to pain from avoidance to observation.
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Warnings:
Forsyth, J. P. & Eifert, G. H. (2016). The Mindfulness and Acceptance Workbook for Anxiety. New Harbinger
A metaphor for separating discomfort from willingness. One dial shows the intensity of pain, fear or anxiety; the other shows willingness to experience it in the service of values. The key discovery is that discomfort can be at 8 and willingness can also be at 7. Both can be true at the same time. Action is possible even when both dials are high.
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Harris, R. (2009). ACT Made Simple. New Harbinger
A core cognitive defusion technique in ACT. Adding the phrase "I notice I'm having the thought that." creates distance between the thought and identification with it. The thought becomes an event in consciousness that can be observed, not a fact about reality or the self. The technique is simple to learn and powerful in practice.
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Warnings:
Hayes, S. C. & Smith, S. (2005). Get Out of Your Mind and Into Your Life. New Harbinger
A reframe of thinking as an attempt to help. Even intrusive or badly timed thoughts are framed as the mind trying to protect. The client learns to thank the mind for the thought, acknowledge it, and still not follow it. This creates respect for the mind while preserving choice: not hostility, but distance.
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Harris, R. (2009). ACT Made Simple. New Harbinger
Instead of following the content of a thought, the client notices that it is part of a familiar story, a narrative the mind tells again and again. Stories receive names: "the abandonment story," "the failure story." This creates a meta-position: "Oh, here is that story again," and loosens automatic obedience to it.
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Warnings:
Hayes, S. C. & Smith, S. (2005); Harris, R. (2009). ACT Made Simple
A classic ACT metaphor. You are the bus driver. Thoughts, feelings and memories are loud passengers. You choose where the bus goes, but the passengers ride with you. The key is that they do not have to be defeated or thrown out; you can keep driving in the chosen direction while hearing their voices.
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Hayes, S. C. (1987); Harris, R. (2009). ACT Made Simple
A classic ACT visualization meditation. The client imagines a calm stream and places each arriving thought, emotion or sensation on a leaf, watching it float away. There is no need to push leaves away and no need to stop them. The practice trains an observer position toward inner experience.
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Warnings:
Hayes, S. C. Strosahl, K. D. & Wilson, K. G. (2011). Acceptance and Commitment Therapy
A brief grounding protocol developed in ACT for moments of emotional storm. The client acknowledges inner experience, reconnects with the body and engages with the world around them. The aim is not to calm down instantly, but to become steady enough to choose the next action.
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Harris, R. (2019). ACT Made Simple, 2nd ed. New Harbinger
A self-as-context metaphor. The sky holds all weather: sun, clouds, rain and storms. The sky is not damaged by the weather. Likewise, awareness can hold thoughts, feelings and sensations without being identical to them. The technique helps the client experience a stable observing position.
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Warnings:
Hayes, S. C. Strosahl, K. D. & Wilson, K. G. (2011). Acceptance and Commitment Therapy
A self-as-context exercise. The client recalls different life stages and notices that thoughts, roles, body and circumstances have changed, while the perspective from which experience is noticed has a continuity. This does not prove a metaphysical self; it helps the client loosen fusion with current roles or stories.
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Warnings:
Hayes, S. C. Strosahl, K. D. & Wilson, K. G. (2011). Acceptance and Commitment Therapy
A visual values clarification tool. The client marks how close current behavior is to values in major life domains. The target makes the gap visible without moralizing: not "good or bad," but "closer or farther from what matters." It becomes a basis for committed action.
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Tobias Lundgren's Bull's Eye values exercise; Harris, R. (2009). ACT Made Simple
A deep values exercise. The client imagines how they would want to be remembered at the end of life. The aim is not morbidity, but contact with what truly matters and with the gap between current living and desired direction.
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Existential therapy traditions (Yalom, I.); Hayes, S. C. et al. (2011). ACT integration
A model by Russ Harris. At any moment there is a choice point: move toward values or move away from discomfort. The technique helps the client see this point in concrete situations and consciously choose direction. It is simple, practical and applicable to relationships, procrastination, crisis moments and everyday behavior.
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Harris, R. (2009). ACT Made Simple. New Harbinger
Kevin Polk's four-quadrant model that makes the client's movements visible. The horizontal axis is toward values versus away from discomfort. The vertical axis is inner experience versus external behavior. The matrix shows how much life energy goes into avoidance and how much remains available for valued action.
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Polk, K. L. & Schoendorff, B. (2014). The ACT Matrix: A New Approach to Building Psychological Flexibility. New Harbinger
The ACT version of exposure: not simply entering the feared situation, but entering while holding the value at the center. Values become the anchor during exposure. This shifts the task from "endure until anxiety disappears" to "do this for what matters." Motivation becomes internal rather than external.
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Twohig, M. P. & Levin, M. E. (2017). Acceptance and Commitment Therapy as a Treatment for Anxiety and Obsessive-Compulsive Spectrum Disorders
A key Hayes metaphor for the paradox of struggle. On one side of the rope is the client; on the other is the monster: anxiety, pain, depression. The harder the client pulls, the harder the monster pulls back. The more life is spent fighting pain, the more pain occupies life. The exit is to drop the rope: the monster may remain nearby, but the client leaves the struggle and moves toward values.
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Hayes, S. C. Strosahl, K. D. & Wilson, K. G. (2011). Acceptance and Commitment Therapy
A four-step protocol for accepting difficult emotions: Recognize, Allow, Investigate and Non-identification. Developed in mindfulness contexts and widely used in ACT, it helps deepen contact with experience without automatic avoidance, especially with shame, guilt and perfectionism.
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McDonald, M. (mindfulness traditions); Hayes, S. C. & Smith, S. (2005). Get Out of Your Mind and Into Your Life. New Harbinger
A quick grounding technique. The client names five things they see, four sounds they hear, three bodily sensations, two smells and one taste. This is a full sensory reorientation to the present moment. It is especially useful in panic, flashbacks and dissociation because it returns attention to the here and now.
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Adapted from DBT (Linehan, M.); Hayes, S. C. et al. (2011)
An exercise in full presence, often done with a raisin or another small object or food. The client explores the object through all five senses as slowly and fully as possible. The exercise makes the difference between autopilot and full presence visible and opens access to the richness of the present moment.
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Kabat-Zinn, J. (1990). Full Catastrophe Living. Delta; Hayes, S. C. et al. (2011)
ACT teaches you not to fight thoughts and feelings, but to act in the direction of values.
By observing inner experience without struggle, you create space for choice.
Write down the thought or feeling → your response → the value → values-based action.