Acceptance and Commitment Therapy — ACT, usually pronounced as a single word rather than the letters — represents a different bet about how to help people in psychological distress. Where classical CBT works to change the content of thoughts and beliefs, ACT works to change the relationship the person has with their thoughts and experiences. For psychosis, where the experiences are often vivid and not easily changed, this shift in focus has turned out to be useful.
ACT for psychosis teaches mindfulness, acceptance of unwanted internal experiences, defusion from sticky thoughts, and a clear connection to personal values — so the person can live a meaningful life alongside symptoms rather than waiting for symptoms to disappear first.
Where ACT came from
ACT was developed by Steven C. Hayes and colleagues at the University of Nevada in the late 1980s and 1990s. It is part of what is now called the "third wave" of cognitive-behavioural therapies, along with mindfulness-based cognitive therapy, dialectical behaviour therapy, and compassion-focused therapy. Hayes's textbook Acceptance and Commitment Therapy (1999, with Strosahl and Wilson) is the foundational reference.
The application of ACT to psychosis was pioneered by Patty Bach and Steven Hayes in a 2002 trial published in the Journal of Consulting and Clinical Psychology showing reduced rehospitalisation rates after a brief ACT intervention with people with psychosis. The work has been extended by clinicians including Brandon Gaudiano, James Herbert, and Eric Morris.
The six core processes
ACT is sometimes summarised by the "hexaflex" — six interconnected processes that together produce psychological flexibility:
- Acceptance — opening up to and making room for difficult experiences rather than fighting them
- Cognitive defusion — seeing thoughts as thoughts, rather than as commands or facts
- Present-moment awareness — being in contact with what is happening now, rather than lost in past or future
- Self-as-context — recognising the observing self that experiences thoughts but is not defined by them
- Values — clarifying what matters most to the person
- Committed action — taking concrete steps in the direction of those values
The opposite of psychological flexibility is fusion with thoughts and experiential avoidance — and a great deal of suffering, ACT argues, comes from spending one's life trying to make uncomfortable internal experiences go away.
What this looks like in psychosis
Acceptance of voices
Rather than trying to suppress or argue with a voice, the patient practises noticing it ("ah, the voice is here again, talking about me") and continuing with whatever they were doing. Acceptance does not mean liking; it means stopping the struggle.
Defusion from delusions
Rather than asking whether a paranoid belief is true, ACT helps the patient notice, "I am having the thought that the neighbours are watching me." This small grammatical shift can loosen the grip the thought has on action.
Values work
What matters to you? Connection with your sister? Returning to college? Being a good cook? Values are clarified and made specific. Then the patient is asked: are the things you are doing today moving you toward those values, or away?
Committed action despite symptoms
Rather than waiting to feel better before acting, the patient practises taking values-aligned actions now, with whatever symptoms are present. This often produces unexpected reductions in distress.
An illustrative example
A composite. A young woman — call her Liyan — has chronic auditory hallucinations and finds herself spending most of her time at home, trying to make the voices stop. In ACT, the focus shifts. She identifies that she values being a good aunt to her two nephews and that she values continuing her photography. Her therapist helps her notice that fighting the voices has not worked in five years and that her current strategy has cost her photography and time with the boys.
The work is not to eliminate the voices. The work is to take her camera out anyway, with the voices present, and to spend Saturday afternoon with her nephews even when the voices are loud. The voices may or may not change. The life she is living begins to.
What the evidence shows
The evidence base for ACT in psychosis is smaller than for standard CBTp but growing:
- Bach & Hayes (2002): brief ACT intervention reduced 4-month rehospitalisation rates compared to treatment as usual
- Gaudiano & Herbert (2006): inpatient ACT reduced distress and improved functioning
- Several smaller trials and a 2018 meta-analysis indexed at PubMed show small-to-moderate effects on distress, hospitalisation, and quality of life
- NICE has not specifically endorsed ACT for psychosis but considers it within the broader category of recommended psychological interventions
How ACT differs from standard CBTp
- Less focus on changing beliefs; more focus on changing relationship to beliefs
- More mindfulness practice
- Explicit values clarification
- Less verbal disputation, more experiential exercises
- Often shorter — many trials run 4 to 12 sessions
The two are compatible. Many CBTp therapists use ACT techniques (defusion, values work, mindfulness) within a broader CBTp framework.
Defusion exercises that translate well to psychosis
- "I am having the thought that..." — prefacing distressing thoughts with this phrase
- Singing the thought — singing a distressing belief to a familiar tune until it loses its grip
- Naming the voice — many patients find that naming a recurring voice ("Critic Bob") makes it easier to relate to
- Leaves on a stream — a guided imagery exercise where thoughts are placed on leaves and watched as they float away
Important nuances
ACT is sometimes misunderstood as "just accept your symptoms and stop trying to get better." That is not what it teaches. Acceptance in ACT is in service of action — accepting an internal experience so that you can take a values-aligned step rather than getting stuck in a struggle that has not worked. This distinction matters; it is the difference between resignation and willingness.
Who it suits
- People with persistent symptoms despite medication
- People who have done standard CBTp and want a different angle
- People drawn to mindfulness practice
- People whose lives have shrunk while they wait to feel better
Who might want to start elsewhere
- People in acute, severely disorganised episodes
- People who find mindfulness practices increase distress (a small minority)
- People for whom standard CBTp has not yet been tried and is locally available
Finding ACT for psychosis
ACT-trained therapists are increasingly common, but those with specific psychosis training are still rare. The Association for Contextual Behavioural Science maintains a therapist directory. Some early-intervention services use ACT-flavoured approaches even when not formally branded as such.
This article is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified mental health professional. If you or someone you know is in crisis, call or text 988 in the US, or your local emergency number.