What is ACT therapy — and how does it actually work?
If you've looked into therapy options, you've probably come across a lot of acronyms. CBT, DBT, EMDR, IFS — the alphabet soup of therapy approaches can make it hard to know what you're actually signing up for who to book with.
ACT is one you'll see more and more. It stands for Acceptance and Commitment Therapy, and it's the primary approach I use in my practice. So let me tell you what it actually is — not the textbook definition, but what it looks like in a real session, why it works, and who tends to find it most useful.
The premise: your thoughts are not the problem
Most people come to therapy hoping to think differently. To stop the anxious thoughts, silence the inner critic, replace the negative beliefs with more positive ones. That's a reasonable hope — it's more or less what therapy has traditionally promised.
ACT starts from a different place.
The central insight of ACT is that trying to control, eliminate, or argue with difficult thoughts and feelings simply doesn't work as well as we'd like — and often even makes things worse. This isn't just a philosophical position. It's grounded in decades of research on what actually happens when people try to suppress unwanted mental experiences.
You may have heard of the white bear problem: if I tell you not to think about a white bear, you immediately think about a white bear. The same mechanism operates with anxiety, shame, self-critical thoughts, and grief. Trying hard not to have a thought tends to make it more frequent and more intrusive, not less.
ACT responds to this dilemma by taking a different angle. Rather than trying to change what you think, it works on changing your relationship to what you think. And rather than focusing on symptom reduction as the goal, it focuses on helping you live a meaningful life — even when difficult thoughts and feelings are present.
The six core processes (in plain English)
ACT is built around six interconnected skills. This is something that some ACT therapists will name outright, but not always [myself included]. So let me share what ACT therapists do!
Before we go further, I also was to predicate this knowledge with a few features: They don't always come up in order in a session, and in practice they weave together — but understanding each one helps clarify what the work actually involves.
Acceptance — not resignation, but willingness. This is the capacity to allow difficult experiences to be present without fighting them or needing them to go away before you can move forward. Acceptance in ACT doesn't mean liking what's happening or agreeing with it. It means making room for it rather than spending energy pushing it away.
Defusion — creating distance from your thoughts. When we're "fused" with a thought, we treat it as literal truth: I am a failure. I am unlovable. This will never get better. Defusion techniques help you step back from thoughts and see them as thoughts — mental events passing through, not facts about you or the world. Something shifts when you go from "I'm going to fail" to "I notice I'm having the thought that I'm going to fail." The content is the same. The relationship to it is different.
Present-moment awareness — being where you actually are. A lot of suffering happens in the past (ruminating on what went wrong) or the future (dreading what might). ACT draws on mindfulness to build the capacity to be present — not because the present is always comfortable, but because it's the only place where your life is actually happening and where you can take meaningful action.
The observing self — there's a part of you that notices. This is one of the more philosophical aspects of ACT, and also one of the most useful. The idea is that beneath all your changing thoughts, feelings, and experiences, there's a stable perspective — a "you" that is observing all of it. That observer doesn't get destroyed by difficult experiences. It watches them. This can be genuinely grounding for people who feel like their emotions are running them.
Values — what actually matters to you. Not goals, not achievements, not what you're supposed to want. Values in ACT are the qualities you want to embody and the directions you want to move in: connection, honesty, curiosity, care, growth. They're compass points, not destinations. This part of the work often involves discovering that someone has been living according to fear-based rules ("I have to succeed or I'm worthless") rather than genuine values — and beginning to reconnect with what actually matters to them. Still unsure what a value is in ACT, I'll direct you to Brene Brown's list of 50 values.
Committed action — moving toward what matters, even when it's hard. Values without action stay abstract. This is where ACT becomes practical: identifying specific steps you can take that are aligned with your values, and taking them even when anxiety, self-doubt, or discomfort shows up along the way. The goal isn't to feel confident before you act — it's to act in the presence of uncertainty.
Together, these six processes build what ACT researchers call psychological flexibility: the ability to be present with whatever is happening internally, and still choose how you want to respond based on what matters to you. That flexibility is the underlying mechanism behind most of ACT's outcomes.
What does this look like in an actual session?
ACT sessions don't follow a rigid script — one of the things I appreciate about the approach is that it's genuinely responsive to what a client brings to the room. But some things tend to show up regularly.
There's often a lot of conversation about what a person notices — in their thoughts, their body, their patterns of behavior. What happens when anxiety shows up? What do they do with it? What are they avoiding, and what does that cost them?
There are experiential exercises — not homework in the traditional sense, but moments of practice during the session itself and between sessions. A defusion exercise. A short mindfulness practice. A values clarification exercise that might involve mapping out what matters most and noticing where current life is aligned with that — and where it isn't.
There's also a lot of focus on values — often more than people expect. Many people enter therapy to feel better. ACT doesn't ignore that, but it reorients around a slightly different question: what kind of life do you want to be living? The bet is that moving toward that life — even imperfectly, even in the presence of difficulty — tends to produce the relief people were looking for, and something more durable and long-lasting than symptom management alone.
Metaphors come up a lot in ACT [as evidenced by the Star Trek Borg joke above]. The approach makes unusual use of imagery and analogy, because some of what it's trying to convey is hard to reach through logic alone. You can explain defusion intellectually — "try to create distance from your thoughts" — and it makes sense as a concept. But the actual experience of defusion, of genuinely loosening the grip a thought has on you, often happens through image and story rather than explanation.
A few that come up regularly in my practice:
The bus driver. Imagine your difficult thoughts and feelings are passengers on a bus you're driving. They're loud, they're opinionated, they shout directions from the back seats and sometimes try to grab the wheel. The instinct is to stop the bus and argue with them, or to let them take over just to get some peace. But you're the driver. You can acknowledge the passengers, hear the noise, and still choose the direction — even with all of them aboard. The passengers don't have to be gone for you to keep driving.
Leaves on a stream. You're sitting beside a gently moving stream. Thoughts arise and you place them on leaves, watching them float by. You're not chasing the leaves downstream or trying to push them away — you're just sitting on the bank, noticing. This is one of the core mindfulness exercises in ACT, and it sounds simple until you try it and discover how strongly the mind wants to jump on a particular leaf and ride it all the way out of sight.
The unwanted party guest. You're hosting a party and an uninvited guest shows up — someone difficult, someone you didn't want there. You can spend the whole evening trying to get them to leave, chasing them from room to room, getting into arguments, missing your own party in the process. Or you can let them be there, attend to your other guests, and get on with the evening. The guest is still there. You're just not organizing your entire night around them.
These metaphors aren't decorative. They do specific work — they give people a handle on experiences that are hard to articulate, and they create a shared language in the therapy room. When a client says "the passengers are really loud today," I know exactly what they mean, and we can work from there. The other thing metaphors do is bypass the part of the mind that argues. ACT works a lot with what it calls experiential avoidance — the very human tendency to avoid or escape uncomfortable internal experiences. Logic often feeds that tendency: you can think your way around a concept, find the flaw in the argument, convince yourself the insight doesn't apply to you. A good metaphor gets in underneath the argumentative mind and lands somewhere closer to experience. That's where change tends to happen.
What ACT is good for?
ACT has a strong and growing evidence base. It's been studied extensively for anxiety disorders, depression, chronic pain, OCD, grief, burnout, and workplace stress. A 2021 meta-analysis across 133 randomized controlled trials found ACT to be significantly effective across a wide range of psychological difficulties, with outcomes comparable to CBT and superior for some presentations.
In my practice, I find ACT particularly well-suited to:
People who have already tried to think their way out of things — and found that insight alone didn't change much. ACT offers a genuinely different mechanism, not just more analysis.
High achievers and people-pleasers — whose suffering often comes from a values-achievement gap: living according to external expectations and performance metrics rather than what actually matters to them. The values work in ACT tends to land meaningfully for this group.
People with anxiety — particularly those who have found that fighting anxiety, avoiding triggers, or trying to reason their way out of worry hasn't worked. ACT's defusion and acceptance tools offer a different relationship with anxious thoughts that doesn't require eliminating them first.
Adolescents — I use a developmentally adapted version of ACT with younger clients, which tends to work well because the values component connects to identity formation in ways that feel genuinely relevant to teenagers navigating who they are.
People managing chronic stress or burnout — where the relationship between values and how they're actually spending their time has often become severely disrupted.
ACT isn't the only approach with evidence behind it, and it isn't the right fit for everyone. But it's a particularly good fit when someone wants to understand themselves, not just manage their symptoms — and when they're open to the idea that a meaningful life and a difficult internal experience can coexist.
A note on how ACT fits with other approaches
In my practice, ACT is the foundation but it doesn't work in isolation. I draw on CBT tools when they're useful — particularly around identifying thought patterns and behavioural experiments. I incorporate mindfulness-based approaches from MBCT when working with people prone to depression or rumination. And I work in a trauma-informed way, which means attending to the nervous system and relational history, not just the content of thoughts.
ACT provides the underlying philosophy and most of the techniques. The other approaches fill in specific gaps depending on what a client needs.
Is ACT right for you?
If you've read this far and something in it resonated — the emphasis on values, the idea that you don't have to eliminate your anxiety before you can live fully, the focus on what actually matters rather than just feeling better — that's worth paying attention to.
The best way to find out if ACT (or any approach) is a good fit is to have a conversation. I offer a free 15-minute consultation call — no commitment, no pressure. We can talk about what's going on for you, whether therapy makes sense, and whether my approach seems like a match.
Gwen Preston is a Registered Psychotherapist offering virtual therapy across Ontario and in-person sessions in Orleans. She uses Acceptance and Commitment Therapy (ACT) as her primary approach, informed by CBT, MBCT, and trauma-informed practice. Free 15-minute consultations are available through the booking page.
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