A man lies awake at night, replaying a mistake he made at work that afternoon. He tells himself to stop thinking about it, and the thought grows louder. He tries to feel confident, and the anxiety deepens. He tries to distract himself with his phone, a drink, a television series, and each works for twenty minutes before the same feeling returns, now joined by frustration that he cannot simply control his own mind. By morning he is exhausted, and a quiet conclusion has formed: something is wrong with me, and until I fix it, I cannot live the way I want to live.
Acceptance and Commitment Therapy, usually spoken as the single word ACT, begins by questioning that conclusion. Its central proposal is surprising and, for many people, a relief. The problem is not that we have painful thoughts and feelings. Every human being does. The problem is the struggle against them, the endless effort to get rid of, suppress, or win arguments with our own inner experience, which costs energy and time and often makes the pain worse. ACT teaches a different approach: make room for difficult thoughts and feelings, step back from them so that they no longer run the show, and put your effort into actions that matter to you, even while discomfort is present.
The therapy was developed in the 1980s by the psychologist Steven Hayes and his colleagues, and it has since become one of the most widely researched psychological treatments in the world. More than a thousand randomized trials have examined it, and meta-analyses find that it is effective for depression, anxiety, chronic pain, substance use, obsessive-compulsive disorder, eating disorders, psychosis, burnout, and many everyday struggles. It belongs to what is often called the third wave of cognitive behavioral therapies, alongside mindfulness-based approaches and dialectical behavior therapy. Yet its language can seem abstract, full of terms such as cognitive defusion, psychological flexibility, and experiential avoidance, which put off many readers who might otherwise benefit.
This article explains ACT in plain language. It describes where the therapy comes from and what problem it tries to solve, and then walks through its six core processes: acceptance, cognitive defusion, contact with the present moment, the observing self, values, and committed action. It shows how these fit together under the idea of psychological flexibility, reviews the evidence, explains what a course of therapy looks like, compares ACT with traditional cognitive behavioral therapy, and offers practical exercises, guidance for families, and answers to common questions. It is an educational overview and not a substitute for treatment, and people with serious difficulties are encouraged to work with a trained therapist. The central message is that a full life does not require the absence of pain, and that people can learn to carry their pain while moving toward what they care about.
Where ACT Comes From
ACT grew out of a long tradition of behavioral psychology, combined with an unusual research program about human language. Understanding the origins helps to explain why the therapy takes the shape that it does.
The Problem of Human Suffering
Steven Hayes, working at the University of Nevada, noticed something puzzling. Animals experience pain, but they do not appear to suffer about their pain in the way that people do. A dog that has been frightened does not lie awake wondering what the fear says about its character. Human beings can. Because we have language, we can remember painful events as if they were happening now, imagine terrible futures, compare ourselves with others, and evaluate ourselves harshly. Language lets us solve problems in the outside world: if there is a hole in the road, we can talk about how to fill it. But when we apply the same problem-solving mind to our inner world, it often backfires. We cannot fill the hole of sadness or remove the feeling of anxiety the way we can remove a stone from a path.
Relational Frame Theory
Hayes and his colleagues developed relational frame theory to explain how language gives thoughts such power. The theory proposes that humans learn to connect events in networks of meaning: this is bigger than that, this is the same as that, this is the opposite of that, this caused that. Once such networks exist, a word can bring with it the feelings attached to the thing it stands for. The word failure, for instance, can bring the sting of every past failure, even when nothing is currently happening. The theory is technical, but its practical message is simple: thoughts can feel like reality, and because language can always generate more words, the mind can produce distressing content endlessly.
From Behavior Therapy to the Third Wave
Traditional behavior therapy, developed in the mid-twentieth century, focused on changing behavior through learning principles. The cognitive revolution, led by Aaron Beck and Albert Ellis, added a focus on changing unhelpful thoughts. The third wave, which emerged in the 1990s, shifted the emphasis once more. Instead of asking how to change or eliminate unwanted thoughts and feelings, it asked how people might change their relationship to them. Mindfulness, acceptance, and values became central. ACT, first described in a 1986 paper by Hayes and Robert Zettle under the name comprehensive distancing, and set out in full in a 1999 book by Hayes, Kirk Strosahl, and Kelly Wilson, is the leading example.
What the Name Means
The name is a good summary. Acceptance refers to making room for painful thoughts, feelings, and sensations, instead of fighting them. Commitment refers to taking action guided by what one values, whether or not one feels like it. The two go together: acceptance frees up energy, and commitment gives that energy a direction. Hayes has often said that the name is also a reminder of the whole message: accept what is out of your control, and commit to action that enriches your life.
A Different Goal
Many therapies aim to reduce symptoms, and ACT does too, but its main goal is different. Its aim is to increase psychological flexibility, the ability to be present, open up to what is happening, and do what matters. Symptom relief often follows, but it is treated as a welcome side effect and not the target. This changes how people relate to treatment. A person is not a failure if anxiety is still present, so long as they are living in line with what they care about.
The Problem ACT Tries to Solve: The Struggle
ACT starts from a diagnosis of why people get stuck. It argues that much of human suffering is not the pain itself but the attempt to control or escape the pain in ways that shrink life.
The Control Agenda
From childhood, we are taught that bad feelings are problems to be solved. Do not cry. Cheer up. Do not be afraid. Think positive. For outer problems, this advice often works. For inner experience, it often fails. Try for a moment not to think of a pink elephant, and notice what happens. Research by the psychologist Daniel Wegner on thought suppression found that people told not to think about a white bear thought of it more often, not less, and then experienced a rebound when they stopped trying. Studies of suppressing emotion find that it tends to increase physiological arousal and does not reduce the feeling. The harder we try to control inner experience, the more it controls us.
Experiential Avoidance
ACT calls the effort to avoid or escape unwanted inner experience experiential avoidance. It takes many forms: drinking to numb anxiety, scrolling to escape sadness, overworking to avoid loneliness, canceling plans to avoid social fear, procrastinating to avoid the discomfort of a task, and ruminating in the hope of solving a feeling. Each brings short-term relief, which is why people keep doing it. But the long-term cost is that life narrows. The person stops doing things that matter because those things might stir up discomfort. Research using a questionnaire called the Acceptance and Action Questionnaire has found that higher levels of experiential avoidance are associated with more depression, anxiety, and poorer quality of life across many groups.
The Trap of Fusion
The second part of the problem is cognitive fusion, the tendency to get hooked by thoughts and to treat them as literal truths or commands. If the thought is I am a failure, a fused person experiences it as a fact about who they are. If the thought is I cannot cope, they behave as though it were so. Fusion means that thoughts dominate behavior, and the person can no longer see them as mental events. The remedy is not to argue with the thoughts or replace them with positive ones, but to learn to see them as thoughts.
Living by Rules Instead of Experience
Fusion also leads to rigid rule-following. People hold rules such as I must feel confident before I try, or I cannot be happy until I fix my past, or If I feel anxious, something is wrong. These rules seem sensible but can trap a person, since they make action depend on feelings that may not change. A person who waits until they feel ready may wait forever.
Stuck in the Past and the Future
Minds drift into regret about the past and worry about the future, which pulls attention away from the only place where action is possible, the present. A person may spend an entire dinner caught in a story about what went wrong last week and barely notice the food or the people at the table. Over time, the habit of living in the head, and not in the moment, drains life of vitality.
Lost Contact With What Matters
When people are busy fighting inner battles, they often lose touch with their values, the things that make life meaningful. Many come to therapy saying that they want to feel better, but when asked what they would do if they did feel better, they often find that they have not thought about it for years. Without values, behavior is driven by avoidance and by short-term relief, and life becomes a series of attempts to feel less bad.
The Result: Inaction and Impulsivity
Together, these patterns leave people either inactive, avoiding anything difficult, or impulsive, doing whatever brings quick relief, even when it harms them. Both patterns are the opposite of committed action in the service of values. The goal of ACT is to break this cycle.
The Heart of ACT: Psychological Flexibility
Psychological flexibility is the central concept of ACT. It means the ability to stay in contact with the present moment, fully and without needless defense, and to change or persist in behavior in the service of chosen values. Put more simply, it means being open to experience, aware of the present, and active in the things that matter. A flexible person can feel anxious and still give the speech, feel sad and still call a friend, and feel the urge to drink and still choose not to.
The Six Core Processes and the Hexaflex
ACT describes psychological flexibility through six interrelated processes, often drawn as a six-sided figure called the hexaflex. They are acceptance, cognitive defusion, contact with the present moment, self as context, values, and committed action. They can be grouped into three pairs. Open means acceptance and defusion, Aware means present-moment contact and the observing self, and Engaged means values and committed action. A well-known summary calls this the triflex: be open, be aware, and be engaged, or, in the common phrasing, open up, be present, do what matters.
Why the Processes Work Together
The six processes are not a sequence of steps but a set of skills that support one another. Acceptance makes it possible to feel what is there. Defusion loosens the grip of thoughts. Present-moment contact keeps attention in the place where life happens. The observing self provides a stable perspective. Values give direction. Committed action turns direction into movement. A therapist may begin anywhere, depending on where the person is stuck.
Measuring Flexibility
Researchers measure psychological flexibility with the Acceptance and Action Questionnaire and its later versions. Studies show that higher flexibility is linked to better mental health, greater work performance, better coping with chronic illness, and more satisfying relationships, and that increases in flexibility during therapy statistically explain improvements in symptoms. This supports the idea that flexibility is a real and trainable skill and not just a slogan.
Process One: Acceptance
Acceptance in ACT is often misunderstood, so it is worth being precise about what it is and what it is not.
What Acceptance Means
Acceptance means actively making room for unwanted inner experience, thoughts, feelings, memories, urges, and bodily sensations, and allowing them to be present without trying to change them, avoid them, or be ruled by them. It is an act of willingness. The therapist often describes it as opening your arms to the feeling instead of bracing against it. It is not liking the feeling, wanting it, or giving in to it. A person who accepts anxiety does not enjoy it. They simply stop wasting energy on the fight and put that energy into what they want to do.
What Acceptance Is Not
Acceptance is not resignation. ACT does not tell people to put up with abuse, injustice, or a bad situation that can be changed. Where something can be changed through action, it is better to act. Acceptance applies to inner experience that cannot be controlled directly, and to facts about the past that cannot be altered. Nor is it approval, passivity, or wallowing. It is a choice to stop fighting what is already here so that one can move.
Willingness
Willingness is the practical form of acceptance. It means being ready to experience discomfort in the service of something valued. A person who wants to give a talk, and feels afraid, asks whether they are willing to feel fear on the way to the stage. Willingness is not a feeling but a choice, like stepping through a doorway, and it can be made again and again. ACT therapists often distinguish it from wanting: you do not have to want the discomfort, only be willing to have it.
The Cost of Control
A classic exercise in ACT invites a person to consider how much time, money, and energy they have spent trying to control their feelings, and what it has cost them in terms of the life they wanted. The question is not whether control strategies ever work, since some do for a while, but whether they work in the long run and what they cost. This approach, known as creative hopelessness, leads many people to the realization that the old strategy has failed, and that it might be worth trying something else.
Metaphors for Acceptance
ACT is rich in metaphor. In the tug-of-war with a monster, a person pulls on a rope against a huge monster across a pit, and the harder they pull, the harder the monster pulls. The solution is to drop the rope. In the quicksand metaphor, struggling to escape makes one sink faster, while spreading out and making contact with the surface allows one to get out. In the polygraph metaphor, a person who is strapped to a perfect lie detector and told to not feel anxious cannot succeed, because the attempt itself produces anxiety. The metaphors give people a felt sense of what acceptance means.
Practicing Acceptance
A basic exercise invites a person to notice a difficult feeling, locate it in the body, describe its size, shape, and texture, and breathe around it, allowing it to be there as an object of curiosity, as if it were an interesting weather system. They might say silently, “I am making room for this feeling.” If it intensifies, they can notice that too. The exercise is not intended to make the feeling go away, but to practice a different relationship with it. Many people are surprised that feelings, when allowed, rise and fall on their own.
The Evidence for Acceptance
Experiments comparing acceptance with suppression have found that people who are asked to accept uncomfortable sensations, such as pain or breathlessness induced in the laboratory, tolerate them longer and report less distress than people who are asked to suppress or control them. Studies of chronic pain show that acceptance of pain predicts better functioning and less depression than pain intensity itself. These findings suggest that acceptance changes how pain affects life.
Process Two: Cognitive Defusion
Defusion is perhaps the most distinctive technique of ACT, and the one that most people find unusual at first. It addresses the way thoughts grip us.
Seeing Thoughts as Thoughts
Cognitive defusion means stepping back from thoughts and seeing them as streams of words and images that come and go, and not as literal truths or commands. It is the skill of noticing a thought as a thought. The difference can be illustrated with a small change in wording. “I am a failure” is a statement that feels like a fact. “I am having the thought that I am a failure” places distance between the person and the thought. Adding another step, “I notice that I am having the thought that I am a failure,” increases the distance further. The thought is still there, but it is no longer in charge.
Why Not Simply Challenge Thoughts?
Traditional cognitive therapy teaches people to examine thoughts, weigh evidence, and replace them with more balanced alternatives, and it works for many people. ACT takes a different view. The aim is not to change the content of thoughts but to change their influence. The reasoning is that arguing with thoughts can keep a person entangled in them, and that a thought can be unhelpful even when it is partly true. ACT asks a different question: not “Is this thought true?” but “Is this thought useful? Does hooking into it help me move toward the life I want?” Many people find this a practical test.
Defusion Techniques
A wide range of techniques are used. In labeling, a person names the type of thought: “There is my worry story again,” or “That is the judging mind.” In the technique of thanking the mind, a person says “Thanks, mind, for that thought,” with a light, non-sarcastic tone, acknowledging that the mind is trying to protect them. In singing the thought to a familiar tune, saying it in a silly voice, or repeating a single word aloud for thirty seconds until it loses its meaning, a person experiences the thought as sound. The word milk, said aloud repeatedly, quickly turns into a meaningless noise, and the same can happen with a word like failure. This exercise, called the milk milk milk exercise and described in early ACT writings, shows that words are not the things they stand for.
In leaves on a stream, a person imagines placing each thought on a leaf and watching it float away on the water. In passengers on the bus, the person imagines driving a bus with unruly passengers, who are the thoughts and feelings, yelling instructions, and learns that they can keep driving toward their destination without throwing the passengers off. In the technique of the mind as a storyteller, a person notices that the mind generates stories, such as the story of I am not good enough, and can ask whether it is a story they want to follow.
Defusion Is Not Distraction or Positive Thinking
Defusion should be distinguished from distraction, which aims to avoid thoughts, and from positive thinking, which aims to replace them. In defusion, the person looks directly at the thought, with curiosity, and then chooses what to do. It is also not a way of dismissing real problems: if the thought is I have a deadline tomorrow, the answer is to work on it. Defusion is for thoughts that are unhelpful or that keep a person stuck.
The Evidence for Defusion
Laboratory studies indicate that brief defusion exercises can reduce the distress and believability of negative self-relevant thoughts. In a well-known study by Masuda and colleagues, repeating a negative self-descriptor, such as stupid, aloud rapidly for a short time reduced both its emotional discomfort and its believability compared with distraction or thought control. Studies of ACT show that reductions in fusion often mediate improvements in symptoms. The research is not unanimous and the effects of individual techniques vary, but the broad pattern supports the idea that loosening the hold of thoughts helps.
Process Three: Contact With the Present Moment
The third process is about attention. ACT encourages people to be consciously, flexibly, and openly in touch with the here and now.
Being Here
Much of the time, human beings are not fully in the present. They are replaying the past or rehearsing the future, running on autopilot, or lost in thought while their bodies go through the motions. Contact with the present moment means noticing what is happening right now, both inside and outside, with openness and curiosity. It means bringing attention to the senses, the body, the activity at hand, and the people present, and noticing when the mind has wandered and gently returning.
Why the Present Matters
The present is where life is lived, and where behavior can be changed. A person cannot act in the past or in the future. Present-moment awareness also helps to notice thoughts and feelings as they arise, which supports acceptance and defusion, and it helps people to notice the effects of their behavior, so that they can learn. Moreover, many painful experiences, such as ruminating about the past and worrying about the future, exist only in the mind, and returning to the present moment can reduce their intensity.
The Link With Mindfulness
This process is the part of ACT most closely related to mindfulness. ACT uses mindfulness practices, but it does not require formal meditation, and many exercises are brief and informal. Examples include noticing the breath for a minute, eating a raisin or a piece of fruit with full attention to taste and texture, taking a mindful walk, or doing a body scan. The skill is learned through repetition. Studies of mindfulness show that regular practice can improve attention, reduce rumination, and lower stress, though the effects of specific techniques differ among individuals, and some people find prolonged introspection uncomfortable. ACT therapists adapt the practice to the person.
Flexible Attention
The word flexible matters. The aim is not to stay in the present moment constantly, which is neither possible nor desirable. People need to plan, remember, and imagine. Flexible attention means that a person can choose where to place their attention, bringing it to the present when that is helpful, and using planning and memory when needed. A person at a family dinner who finds their mind drifting to worries can notice and return, but the same person doing their taxes may use their mind to plan.
Everyday Practices
Simple habits strengthen present-moment awareness. A person might stop for a few breaths before getting out of the car, notice five things they can see, hear, and feel, take a moment during a conversation to listen fully, or pay attention to the sensations of a shower. Such micro-practices, repeated throughout the day, accumulate. People often describe a new feeling of aliveness and a reduction in the sense that life is passing them by.
Process Four: The Observing Self
The fourth process, called self as context or the observing self, is the most abstract, but it provides the stable ground on which the others rest.
Three Senses of Self
ACT distinguishes three ways of experiencing oneself. The conceptualized self is the story that a person tells about who they are, with labels such as shy, a failure, anxious, a good mother, or a perfectionist. The ongoing self-awareness is the stream of noticing what is happening moment to moment. The observing self is the part that notices, the perspective from which all experience is witnessed, which has been present throughout life and does not change. A person may have been a child, an adult, happy, and depressed, but the one who noticed all of those experiences has been the same.
The Sky and the Weather
The best-known metaphor compares the observing self to the sky, and thoughts, feelings, and sensations to the weather. Weather can be sunny or stormy, calm or violent, but the sky holds it all and is not harmed. The sky does not need to fight the weather. In the same way, the observing self can hold painful feelings without being damaged by them. Another metaphor is the chessboard, in which thoughts and feelings are the chess pieces fighting for position, and the observing self is the board itself, which holds the pieces and does not take sides.
Freedom From the Self-Story
Seeing oneself as the observer rather than as the content makes it easier to loosen rigid self-labels. A person who believes that I am an anxious person may not try new things because that is the kind of person they are. When they can see anxiety as a state that comes and goes, they are freer. The observing self does not require that the person has no history or no personality, but allows them to hold those lightly. It also supports compassion, since it offers a place from which to view suffering without being swallowed by it.
Perspective Taking
ACT also uses exercises that practice taking different perspectives, such as imagining one’s wise older self giving advice, looking at a situation from the viewpoint of a friend, or noticing that I, here, now, is different from there, then. These exercises build the flexibility of perspective that underlies empathy and problem solving.
The Observer Exercise
A typical practice asks a person to sit quietly and notice their thoughts, feelings, body sensations, and surroundings, each in turn, and then to notice that there is something that is noticing all of it. They might recall themselves at different ages, with different bodies and concerns, and notice that the one who observed remains. For many, this brings a sense of spaciousness and safety. For some, the abstraction can be confusing, and therapists introduce it gradually with concrete examples.
Process Five: Values
Values are at the heart of ACT. They provide the answer to the question of why one should accept pain and take action, and they give direction to the whole process.
What Values Are
Values are freely chosen, ongoing qualities of action that give life meaning. They are not goals, which can be achieved and crossed off, but directions, like heading west. A person can never finish being a loving parent, a curious learner, a kind friend, or an honest colleague, but they can act in line with those values in each moment. Values are also distinct from feelings: a person can value connection even on a day when they do not feel sociable. They are not rules, not what others expect of us, and not what we think we should value. They are about what we want our lives to stand for.
Values Versus Goals
The distinction between values and goals is practical. A goal is something that can be completed, such as getting married, earning a degree, or running a marathon. A value is a way of living, such as being loving, learning, or taking care of the body. Goals can fail, but values cannot, since in each moment a person can choose to act in line with their values. This makes values a stable source of motivation, even when goals are blocked. A person who cannot find a partner can still live the value of intimacy through friendships and through openness.
Domains of Life
ACT often invites people to consider values in several domains: close relationships, parenting, friendship, work and career, education and growth, leisure and play, spirituality, community and citizenship, and health and well-being. The Valued Living Questionnaire, developed by Kelly Wilson and colleagues, asks people to rate how important each domain is and how consistently they have lived in line with it in the past week. The gap between importance and action often shows where to focus.
Discovering Values
Many people have never thought about their values. ACT therapists use exercises to help. In the eightieth birthday or funeral exercise, a person imagines attending an event at which people they care about speak about them and what they hope to hear. In the exercise of the ideal day, they imagine a day lived according to their deepest wishes. Another approach asks what they would do if fear were not a barrier, or what they would want to be known for. The painful emotions that a person struggles with can also point to values: a person who is sad about a distant relationship values closeness. People are encouraged to choose, not to adopt values that they think they should have. It can be helpful to ask who they would be if no one were watching.
Values and Pain
ACT makes a deep point about the link between values and pain. We hurt where we care. The fear of rejection reveals a value of connection, the grief of loss reveals love, and the sting of failure reveals a commitment to excellence. Seeing this can transform the meaning of suffering. Instead of an enemy, pain becomes a sign of something important, and the person can choose to carry it in service of what matters. This is a central reason why acceptance is not just grim endurance, but a willingness that has a purpose.
Cautions About Values Work
Values work should avoid several traps. A person may confuse values with goals or with what society expects. They may use values as a stick to beat themselves with, noticing only how far they have fallen short, which is not the aim. They may also pursue values rigidly or in the service of avoidance, such as working long hours in the name of values while avoiding feelings. A good therapist helps the person to keep values flexible and compassionate.
Process Six: Committed Action
The final process brings everything together in behavior. Values and acceptance are of little use unless they lead to action.
What Committed Action Means
Committed action means taking effective, concrete steps guided by values, over and over, even when it is hard, and returning to the path when one strays. It includes setting goals that serve values, developing the skills needed, and persisting in the face of difficulty. It borrows from traditional behavior therapy, drawing on goal setting, exposure, skills training, and behavioral activation. The difference is that the action is framed in terms of values and that the discomfort that arises is accepted, not eliminated first.
Small Steps
Change does not need to be large. A person who values health might begin with a ten-minute walk, and a person who values connection might send one message. The key is that the step is specific, achievable, and linked to a value. The ACT therapist often asks what the smallest step would be, one that the person would be willing to take this week, even with anxiety present. Success builds confidence and momentum, and failures become information, not proof of inadequacy.
Making Room for Obstacles
When a person sets out to act on their values, internal obstacles arise: fear, doubt, fatigue, and self-critical thoughts. ACT does not ask them to eliminate these first, but to bring the other skills to bear. A person might notice the thought I will make a fool of myself, say thanks to the mind, make room for the anxiety, and walk into the room anyway. This is the integration of the six processes. External obstacles also arise, and problem solving and skills training are used.
Exposure in ACT
Exposure to feared situations is a major part of committed action in ACT, as in traditional cognitive behavioral therapy. The difference is the emphasis. In traditional exposure, the aim is often to reduce anxiety or to test predictions. In ACT, the aim is to practice willingness and to increase the range of valued behavior, so that exposure is something that a person chooses in the service of their values. Success is measured by the action taken, not by the reduction of anxiety.
Lapses and Returning to Values
Lapses are expected. A person who avoids, drinks, or retreats after committing to a different path has not failed, but has an opportunity to notice what happened, make room for the feelings, and commit again. ACT describes this as returning to the path. The idea of commitment is not perfection but continual re-commitment. This gentle attitude helps to prevent the shame spiral that often follows a lapse.
Putting It Together: A Day in the Life of Flexibility
The six processes may sound abstract, but they come together in ordinary moments. Consider a woman who wants to speak at a team meeting. She notices that her heart is racing, her mouth is dry, and her mind is saying “You’ll sound stupid.” This is the cue for flexibility. She notices the thought as a thought, and thanks her mind for trying to protect her, which is defusion. She breathes and makes room for the anxiety, which is acceptance. She feels her feet on the floor and the faces in the room, which is present-moment contact. She remembers that she is the one who notices the nerves and that she is more than they are, which is the observing self. She recalls that she values contributing and being an active colleague, which is values. And she raises her hand, which is committed action. The anxiety may not disappear, but she has acted in line with what matters.
The Matrix and Other Tools
ACT practitioners often use simple tools to organize experience. One is the ACT Matrix, developed by Kevin Polk, in which a person plots, on two axes, whether an experience comes from the five senses or from the inner world of thoughts and feelings, and whether it is a movement toward what matters or away from it. It helps people to see their avoidance and their values on one page. Another is the choice point, developed by Russ Harris, which shows a fork in the road: when a hook of difficult thoughts and feelings arises, a person can move away from values, or toward them. These tools turn abstract concepts into practical maps.
A Composite Example
The following account is a composite and does not describe a real person. A woman in her early forties, whom we shall call Elena, came to therapy after years of panic attacks and avoidance. She had stopped driving on motorways, declined invitations, and given up a job she liked because it involved presentations. She told her therapist that she wanted to get rid of her anxiety. In the early sessions, she realized that she had spent two decades trying to control it, with little success and at great cost. She practiced noticing her thoughts as thoughts, using the phrase “I’m having the thought that…” and making room for the physical sensations of panic, with curiosity. When asked what mattered to her, she said that she wanted to be a mother who showed her daughter that fear does not decide how you live, and a friend who showed up. Together, she and her therapist chose small steps: a short motorway drive with her daughter, accepting a friend’s invitation to dinner, and giving a short update at a team meeting. Anxiety was present at every step, and she took the steps anyway. After several months, the panic attacks had decreased, but the more significant change, she said, was that she no longer organized her life around avoiding them. She had gone back to presenting, and she described the experience as getting her life back.
What ACT Looks Like in Therapy
People often wonder what an ACT session is like. While therapists vary, there are common features.
A Collaborative, Experiential Style
ACT therapists adopt a collaborative stance, treating clients as equals, and often share that they too struggle with difficult thoughts and feelings, since these are universal. Therapy is experiential: instead of only talking about concepts, people practice them in the room through exercises, metaphors, and role plays. Sessions typically include a brief mindfulness practice, a discussion of what happened since the last meeting, work on one or two processes, and the setting of a values-based action for the coming week.
Assessment and Case Formulation
The therapist begins by understanding the problem, the strategies the person has used to cope, and how these have worked, as well as what matters to them. The formulation looks for inflexibility in each of the six processes: where is the person fused, avoiding, absent, attached to a self-story, disconnected from values, or inactive? This guides the choice of techniques. Questionnaires may be used to monitor progress.
Length and Format
ACT can be delivered in many formats. Standard individual therapy typically lasts eight to sixteen sessions, though some people need more and some fewer. It is also delivered in groups, in brief interventions of one to four sessions in primary care, in workshops, through books and online programs, and through apps. Studies show that group and self-help formats can be effective for many conditions. Focused ACT, a brief form developed by Patricia Robinson and colleagues, is used in primary care settings.
Homework and Practice
Between sessions, people practice skills in everyday life, such as a short mindfulness exercise, a defusion technique, or a values-based action. The homework is not meant to be a test, and the therapist normalizes difficulty. Regular practice makes the skills more available in difficult moments.
The Therapeutic Relationship
The relationship is used as a place to practice. If the person avoids a topic in the session, the therapist might gently name it and invite willingness. If the therapist becomes frustrated or stuck, they may use the same skills themselves. Many people experience this as a refreshing contrast to a therapeutic stance that positions the therapist as an expert who fixes the client.
Common Difficulties in the Early Stages
People may initially be skeptical, since being told to accept pain may sound like being told to give up. Others may misinterpret acceptance as passivity, or defusion as dismissing thoughts. Some find metaphors confusing, and some find mindfulness uncomfortable. A good therapist addresses these, offering reassurance, explaining the rationale, and adapting the approach. The aim is not to push but to invite.
ACT Compared With Traditional Cognitive Behavioral Therapy
ACT is part of the cognitive behavioral family, and it shares many techniques with other approaches, but there are differences of emphasis. Understanding them helps people to choose and to understand what they are being offered.
Similarities
Both approaches are structured, goal-oriented, collaborative, and based on research. Both use homework, behavioral experiments, exposure, and attention to the links between thoughts, feelings, and behavior. Both are effective for many conditions, and both assume that people can learn new ways of responding.
Differences
Traditional cognitive behavioral therapy generally seeks to change the content of thoughts, by examining and restructuring them, and to reduce symptoms such as anxiety and low mood. ACT generally seeks to change the person’s relationship to thoughts and feelings, through acceptance and defusion, and to increase valued living, treating symptom reduction as secondary. In ACT, a person might be asked to carry a difficult thought with them and act anyway, instead of working to challenge it. ACT also places a greater emphasis on values and on mindfulness. In practice, many therapists blend the two, and the distinction is less sharp than it appears.
Which Is Better?
Studies comparing ACT with traditional cognitive behavioral therapy have generally found that the two are about equally effective for anxiety and depression overall, with some studies favoring one or the other for specific conditions or outcomes. A meta-analysis by Öst, which raised concerns about the quality of some ACT trials, found that ACT was effective but not clearly superior to established treatments, and more recent reviews with better-quality trials have found similar results. The choice may depend on a person’s preferences: those who find it difficult to challenge their thoughts, or who feel that traditional cognitive therapy invalidates their experience, may prefer ACT, and those who like the logical, evidence-based approach of cognitive restructuring may prefer cognitive therapy. Either can work.
ACT and Other Third-Wave Therapies
ACT is related to mindfulness-based cognitive therapy, dialectical behavior therapy, and compassion-focused therapy. All emphasize acceptance and mindfulness, but they differ in structure and target. DBT is a more comprehensive program with skills for emotion regulation and interpersonal effectiveness, developed for severe emotional dysregulation. Mindfulness-based cognitive therapy is a group program that uses meditation to prevent depressive relapse. ACT is more flexible, built around six processes, and applied to many problems.
The Evidence for ACT
ACT is one of the most heavily researched psychological therapies, and the evidence is broad though not without limitations.
Overall Findings
Meta-analyses of randomized trials, including those by A-Tjak and colleagues, Hayes and colleagues, Gloster and colleagues, and others, covering many hundreds of trials, find that ACT is more effective than waiting list, placebo, and treatment as usual, and about as effective as other established treatments such as cognitive behavioral therapy across a range of conditions, with small to moderate effect sizes. A large umbrella review published in 2020 by Gloster and colleagues concluded that ACT is effective for anxiety, depression, addiction, chronic pain, and a range of other problems, and noted that methodological quality has improved over time.
Specific Conditions
For depression, trials find that ACT is effective, with results comparable to cognitive behavioral therapy. For anxiety disorders, including generalized anxiety, social anxiety, panic, and obsessive-compulsive disorder, ACT produces significant improvement, with some evidence of lasting effects. For chronic pain, ACT is one of the best-supported psychological approaches, improving functioning and reducing distress, even when pain intensity changes little. For substance use, trials show benefits for smoking cessation, alcohol, and drug use. In psychosis, trials by Patricia Bach and Steven Hayes found that a brief ACT intervention reduced rehospitalization. ACT has also shown benefit in eating disorders, tinnitus, diabetes self-management, epilepsy, cancer-related distress, trichotillomania, and workplace stress.
Mediators: Why It Works
Studies of how ACT works find that improvements in psychological flexibility, acceptance, and defusion statistically explain a part of the improvement in outcomes, which is consistent with the model. However, researchers continue to debate how distinct these mechanisms are from those of other therapies, and whether the model fully accounts for the results.
Limitations and Criticisms
Several criticisms deserve mention. Some trials, particularly early ones, were small, used weak comparison conditions, and were conducted by the therapy’s developers, which may inflate effects. Critics argue that the concepts of ACT overlap with older ideas and that the language can be vague. The theoretical underpinning, relational frame theory, is considered complex, and its empirical status is debated. The distinction between acceptance and avoidance may be hard to put into practice. There is also a concern that the emphasis on accepting pain may be misapplied to people in genuinely harmful situations. Researchers have called for more rigorous trials, with active comparison treatments and independent investigators, and recent trials increasingly meet these standards.
Cultural and Diversity Considerations
ACT has been adapted for different cultures, and its emphasis on values and acceptance resonates with many traditions, including some that have long emphasized mindfulness and acceptance. Studies in various countries show benefit. Therapists must be sensitive to the fact that notions of the self and of emotion differ across cultures, and to the effect of social injustice on suffering, since acceptance should not be used to dismiss real systems of oppression.
Who Can Benefit From ACT
Because the processes are general, ACT is applied to many groups and problems.
Anxiety, Depression, and Worry
For people caught in cycles of worry and avoidance, ACT offers a way to stop fighting thoughts and feelings and to re-engage in life. In depression, values-based action works similarly to behavioral activation, with defusion helping with self-critical thoughts. In generalized anxiety, ACT helps people to make room for uncertainty.
Trauma and Post-Traumatic Stress
ACT is used with people who have experienced trauma, to reduce avoidance, to allow painful memories to be present without fusion, and to reconnect with values. It is often used alongside trauma-focused therapies, and caution is needed with mindfulness, which may need adaptation.
Chronic Pain and Illness
People living with chronic pain, cancer, diabetes, multiple sclerosis, and other long-term conditions often find that a focus on controlling symptoms leads to frustration. ACT helps them to accept what cannot be changed and to live in line with values despite the condition. It is used in pain clinics worldwide.
Addiction and Compulsive Behavior
People with substance use problems can learn to notice urges without acting on them, practicing willingness and defusion from thoughts such as I need this. Values work gives a reason for change that goes beyond avoiding punishment.
Obsessive-Compulsive Disorder and Related Conditions
In obsessive-compulsive disorder, ACT complements exposure and response prevention by helping people to accept uncertainty and unwanted thoughts. It is also used for body-focused repetitive behaviors, health anxiety, and body image problems.
Psychosis
ACT for psychosis does not aim to eliminate voices or unusual beliefs but to change a person’s relationship to them, so that they cause less distress and interfere less with life. Trials have shown reductions in hospital admissions and in the believability of symptoms.
Children, Adolescents, and Parents
ACT has been adapted for young people, using age-appropriate metaphors and games, and for parents, helping them to respond to their children with warmth and flexibility. Trials show benefits for anxiety, depression, and chronic pain in adolescents, and for parental stress in families of children with difficulties.
Work, Sport, and Everyday Life
ACT is used in workplaces to reduce stress, burnout, and prejudice, and to improve performance. In sport, it helps athletes to perform under pressure. In everyday life, many people use ACT principles for perfectionism, procrastination, difficult relationships, and the common feeling of being stuck. Its message of acting on what matters even when uncomfortable is applicable almost anywhere.
Who May Need a Different or Additional Approach
People in acute crisis, with severe suicidal thoughts, or in unsafe circumstances need safety and stabilization first, and may need more structured treatment. People with severe depression may need medication alongside therapy. Those who find abstract concepts confusing may need a more concrete approach. A clinician can help to decide.
Practical Exercises You Can Try
The following exercises are drawn from ACT and can be tried by anyone, though they are not a substitute for therapy. People with trauma or severe distress should proceed gently and may wish to work with a therapist. Anyone who feels unsafe or has thoughts of suicide should contact a crisis line or emergency services.
Name the Story
When a familiar self-critical or worrying thought appears, give it a name, such as the I’m-not-good-enough story or the what-if story. Then say, “Here is the not-good-enough story again.” Notice what happens to your relationship with the thought when it becomes a story that the mind tells.
I’m Having the Thought That
Take a thought that bothers you and put the phrase “I’m having the thought that” in front of it. Then add “I notice that I’m having the thought that.” Repeat several times and observe the change in distance.
Say It Slowly or Sing It
Choose a word that hurts, such as failure or worthless. Say it aloud, slowly, for thirty seconds, and notice how the sound changes. Alternatively, sing the thought to the tune of a song you know. This is not meant to make light of pain but to show that words are sounds and symbols.
Drop the Rope
Think of a struggle you have been having with a feeling, such as anxiety or sadness. Imagine that you are in a tug-of-war with a monster over a pit, and that the rope is the struggle. Ask what would happen if you dropped the rope, and let the monster be there. Notice what you could do with your hands once they are free.
Make Room
When a difficult feeling arises, pause and locate it in the body. Describe its shape, size, color, and temperature. Breathe slowly toward it, imagining making space around it, and say, “I’m making room for this.” Stay for a minute or two, noticing that the feeling changes. Then turn your attention to what you were doing.
Five Senses Grounding
Pause and name five things that you can see, four that you can touch, three that you can hear, two that you can smell, and one that you can taste. This returns attention to the present moment and can be done anywhere.
Observer Practice
Sit quietly and notice your thoughts for a minute, then your emotions, then your sensations. Then ask, “Who is noticing?” Rest in the sense of being the one who observes. Return to it when thoughts feel overwhelming.
Values Clarification
Take a sheet of paper and write the domains of life, such as relationships, work, health, learning, and community. For each, write a sentence about what you would like to stand for in that area, as if no one would judge you. Then rate from one to ten how closely your recent actions match each. Choose one domain to focus on this week.
The Eightieth Birthday Exercise
Imagine that you are attending your eightieth birthday party and that three people who care about you are giving a speech. What would you want them to say about the way you lived and the way you treated others? Write down the qualities that you hope they will mention, and consider what small step you could take this week to live in line with them.
The Smallest Step
Choose one value and ask what is the smallest action that you would be willing to take this week to move in that direction, even if you feel uncomfortable. Write it down with a time and place, for example “Call my sister on Thursday evening.” Notice the thoughts and feelings that arise, make room for them, and take the step. Afterward, observe what happened, without judging.
Choice Point Check-In
When you notice yourself stuck, ask four questions. What is hooking me? What would I do if I were moving toward my values? What can I do right now to make room for what I am feeling? And what small action would take me in the direction that I care about? Use this as a regular check-in during the day.
Supporting Someone Who Is Using ACT
Family and friends of people learning ACT can help by understanding its basic message and avoiding responses that reinforce the struggle.
What Helps
Acknowledge that the person’s feelings are real and difficult, without trying to fix them. Encourage values-based action, asking what they would like to do and offering to join them in small steps. Avoid telling them that they should stop feeling a certain way or that they should think positively. Be patient when they use unfamiliar language, and remember that they are practicing. Using the skills yourself, such as noticing your own thoughts as thoughts, can be a form of support.
What to Avoid
Avoid reassuring excessively or accommodating avoidance, which maintains the struggle. Avoid arguing with their thoughts or telling them that they are irrational, which can lead to defensiveness. Avoid using ACT language as a weapon, such as telling someone in distress to just accept it. Acceptance cannot be forced.
Parents and Children
Parents can help children by naming feelings, normalizing them, and encouraging brave action in the presence of fear. They can model accepting discomfort and acting on values, such as saying “I’m feeling nervous, and I’m going to do it anyway.” They can help the child to find what matters to them and to take small steps.
Looking After Yourself
Supporters have difficult thoughts and feelings of their own. ACT’s principles apply equally to them: notice, make room, and act on what matters, including taking care of oneself.
Common Myths About ACT
Several misconceptions get in the way of understanding. The first is that acceptance means giving up. It means ceasing to fight inner experience that cannot be controlled, in order to put energy into action that can make a difference. The second is that ACT tells people to ignore or suppress their feelings. It asks for the opposite, to feel them fully and without defense. The third is that ACT is only mindfulness. Mindfulness is one of six processes, and ACT also involves values and action.
A fourth myth is that ACT does not care about getting better. It cares about quality of life, and symptom relief often follows. A fifth is that defusion is a way of dismissing thoughts as unimportant. It is a way of choosing how to respond to thoughts, and thoughts that are useful can be followed. A sixth is that ACT is too abstract for ordinary people. Its exercises are concrete and often simple. A seventh is that ACT is a replacement for medication. It can be used with or without medication, and decisions should be made with a doctor. An eighth is that it is only for people with mental illness. Its principles apply to everyone. A ninth is that values are the same as goals or rules. Values are directions and are chosen freely.
A Realistic and Hopeful Outlook
ACT does not promise a life without pain, and that is part of its honesty. It does not claim that anxiety will vanish, that grief will end, or that self-doubt will never return. What it offers is a different way of carrying these experiences. Studies show that people who learn the skills tend to feel less caught by their thoughts, more willing to experience discomfort, more connected to what matters, and more active in their lives. Many report a new sense of freedom, not from pain, but from the struggle with it.
Progress is not a straight line. People fall back into old patterns of avoidance and fusion, particularly under stress, and the skills must be practiced repeatedly. The good news is that each return to the present, each defusion, each willing step is itself a success. Over time, flexibility becomes habitual. A person may still hear the voice that says you can’t, but they recognize it as a voice, and they can choose to act on what they care about.
When to Seek Help
It is time to seek professional help when painful thoughts and feelings are causing you to avoid important parts of life, when you feel stuck despite trying many strategies, when you use alcohol, drugs, or other behaviors to escape inner experience, when mood is persistently low or anxiety is overwhelming, or when you feel hopeless. A good first step is to see a general practitioner or a mental health professional, and to ask whether they offer ACT or ACT-informed therapy. If you are having thoughts of suicide, contact local emergency services or a crisis line immediately. Early help generally leads to better outcomes.
Conclusion
Acceptance and Commitment Therapy rests on a simple but radical idea: pain is a normal part of being human, and the struggle to get rid of it often causes more suffering than the pain itself. The therapy offers six connected skills to change the relationship with inner experience. Acceptance makes room for feelings. Defusion loosens the grip of thoughts. Contact with the present moment brings attention to where life is happening. The observing self provides a stable perspective from which to watch the weather of the mind. Values supply direction, and committed action turns direction into movement. Together they build psychological flexibility, the ability to be open, aware, and engaged.
The approach has a large research base and helps with depression, anxiety, chronic pain, addiction, trauma, and many everyday struggles, performing about as well as other established treatments, though better trials and independent studies are still needed. Its plain message can be summarized in three steps: open up to what you feel, be present in the moment, and do what matters. Anyone who recognizes themselves in this description is encouraged to try the exercises gently, to seek a trained therapist if difficulties are serious, and to reach out for emergency help in a crisis. A good life is not a life without difficult thoughts and feelings. It is a life in which a person can carry them, hold them lightly, and keep walking in the direction of what they love.
FAQ About Acceptance and Commitment Therapy
What is Acceptance and Commitment Therapy in simple terms?
ACT is a form of psychological therapy that teaches people to change their relationship with difficult thoughts and feelings instead of trying to eliminate them. It rests on the idea that struggling against unwanted inner experience often makes it worse and shrinks life. Instead, ACT teaches people to make room for painful feelings, to see thoughts as thoughts and not as facts, to stay in touch with the present moment, to clarify what they value, and to take steps toward those values even when discomfort is present. The goal is not the absence of pain but a rich and meaningful life, which is described as psychological flexibility.
Does acceptance mean giving up or putting up with bad situations?
No. Acceptance in ACT means willingness to experience thoughts, feelings, and sensations without struggling against them, particularly when they cannot be controlled directly. It does not mean approving of what has happened, resigning yourself to unfair or harmful circumstances, or abandoning efforts to change things that can be changed. Where action can improve a situation, ACT encourages action. Acceptance applies to inner experience and to facts that cannot be altered, and it frees energy for the things that can be influenced. A person can accept their grief and still work for justice, or accept their anxiety and still take a risk.
What is cognitive defusion?
Cognitive defusion is the skill of stepping back from thoughts and seeing them as words and images that the mind produces, instead of as literal truths or commands. For example, instead of believing the thought that you are a failure, you might notice that you are having the thought that you are a failure. Techniques include labeling thoughts, thanking the mind, repeating a word until it loses its meaning, singing a thought, and imagining thoughts as leaves floating down a stream. Defusion does not aim to get rid of thoughts or to prove them wrong, but to reduce their power over behavior, so that you can choose what to do based on what is useful and what matters.
How is ACT different from traditional cognitive behavioral therapy?
Traditional cognitive behavioral therapy usually focuses on identifying and changing unhelpful thoughts and reducing symptoms. ACT focuses more on changing the relationship to thoughts and feelings, through acceptance, defusion, and mindfulness, and on values-based action, treating symptom reduction as a possible by-product and not the main target. Both are structured, evidence-based, and use homework and exposure, and many therapists combine elements of both. Studies suggest that they are about equally effective for many conditions. Some people prefer ACT because it does not require arguing with thoughts, while others prefer the logic of cognitive restructuring.
What are values in ACT, and how are they different from goals?
Values are freely chosen directions that give life meaning, such as being a loving parent, a curious learner, or an honest friend. They describe how you want to act and what you want to stand for, and they can be lived out in any moment, but they can never be completed. Goals are specific achievements that can be ticked off, such as getting a degree or running a race. Values guide the choice of goals, and they remain available even when goals are blocked. Values are also not rules or what others expect of you. ACT helps people to discover and clarify their values and to take steps in line with them.
What conditions does ACT treat, and does it work?
ACT has been tested for depression, anxiety disorders, obsessive-compulsive disorder, chronic pain, substance use, eating disorders, psychosis, post-traumatic stress, health anxiety, workplace stress, and many other problems. Meta-analyses of hundreds of randomized trials find that it is more effective than waiting lists and usual care and about as effective as other established treatments such as cognitive behavioral therapy, with small to moderate effects. The evidence is strongest for chronic pain, anxiety, and depression. Some early trials were small or had weaknesses, but the quality of research has improved. Outcomes vary between individuals.
How long does ACT take?
The length varies with the problem and the format. Individual therapy often runs for eight to sixteen sessions, though some people need more. Brief versions of one to four sessions have been used in primary care, and group programs and workshops are common. Some people notice changes within weeks, such as a greater ability to step back from thoughts, while deeper changes in living by values develop over months of practice. Skills are practiced between sessions, and many people continue to use them for years.
Can I learn ACT on my own?
Many people benefit from self-help books, online courses, and apps based on ACT, particularly for milder difficulties, and research shows that guided self-help can be effective. Popular books by Russ Harris and Steven Hayes offer clear introductions and exercises. For severe depression, trauma, thoughts of suicide, or complex problems, working with a trained therapist is advisable, since they can tailor the approach and provide support. Using a book alongside therapy is often helpful. If at any point you feel unsafe, contact a doctor, a crisis line, or emergency services.
Does ACT mean I should not try to feel better?
No. ACT does not ask people to avoid feeling better or to cultivate pain. Many people do feel better as a result of the therapy. The point is that trying to control feelings directly is often ineffective and costly, and that a life worth living cannot be postponed until feelings are under control. ACT invites you to put your efforts into acting on what matters and to let feelings change as they will. Reduced anxiety and improved mood are welcomed as by-products, but the measure of success is whether you are living in line with your values.
Is ACT suitable for everyone?
ACT is applied to a wide range of people, including adults, adolescents, and, in adapted forms, children, and in many cultures. Some people may find its abstract language or metaphors difficult at first, and therapists adapt accordingly. People in acute crisis or with severe suicidal thoughts need safety and stabilization first, and those with severe depression or psychosis may need medication or other treatment alongside it. Mindfulness exercises may need adjustment for people with trauma. A clinician can help to decide whether ACT is a good fit.
How can I help a loved one who is doing ACT?
Listen without trying to fix, acknowledge that their feelings are real, and encourage small, values-based steps. Avoid telling them to think positively, to calm down, or to stop feeling a certain way. Do not accommodate avoidance excessively or use their therapy language against them. Be patient with practice, and celebrate efforts. If you wish, learn the basics, and try the exercises yourself, which can strengthen your own flexibility and your relationship. If they are in crisis or speak of suicide, contact emergency services or a crisis line.
Recommended Books on Acceptance and Commitment Therapy
- The Happiness Trap: How to Stop Struggling and Start Living by Russ Harris
- Get Out of Your Mind and Into Your Life: The New Acceptance and Commitment Therapy by Steven C. Hayes and Spencer Smith
- A Liberated Mind: How to Pivot Toward What Matters by Steven C. Hayes
- ACT Made Simple: An Easy-to-Read Primer on Acceptance and Commitment Therapy by Russ Harris
- The Confidence Gap: A Guide to Overcoming Fear and Self-Doubt by Russ Harris
- The Mindfulness and Acceptance Workbook for Anxiety by John P. Forsyth and Georg H. Eifert
- The Mindfulness and Acceptance Workbook for Depression by Kirk D. Strosahl and Patricia J. Robinson
- The Reality Slap: Finding Peace and Fulfillment When Life Hurts by Russ Harris
- Acceptance and Commitment Therapy: The Process and Practice of Mindful Change by Steven C. Hayes, Kirk D. Strosahl, and Kelly G. Wilson
- Learning ACT: An Acceptance and Commitment Therapy Skills-Training Manual for Therapists by Jason B. Luoma, Steven C. Hayes, and Robyn D. Walser
