Acceptance and commitment therapy (ACT, pronounced "act") is a third-wave behavioral therapy with growing evidence for anxiety disorders. Rather than trying to change anxious thoughts, ACT teaches willingness to experience anxiety while committing to actions aligned with personal values. It often works well for patients who have done CBT, for whom further thought-challenging feels like more of the problem.
ACT is sometimes described as the cousin of CBT because it shares behavioral roots but takes a different approach. Where CBT focuses on identifying and challenging unhelpful thoughts, ACT focuses on changing the relationship to those thoughts and aligning behavior with personal values. The shift is subtle but, for some patients, meaningful for years afterward.
What ACT actually is
Acceptance and commitment therapy was developed by Steven Hayes and colleagues in the 1980s and 1990s as part of the third wave of behavioral therapies. The acronym ACT reflects its three core moves: accept what's out of your control, choose a direction based on your values, take action.
The therapy has six interconnected processes: cognitive defusion (creating distance from thoughts), acceptance (willingness to experience difficult internal states), present-moment awareness, self-as-context (seeing yourself as the observer of experience rather than identical with it), values clarification, and committed action.
For anxiety, the central insight is that the struggle against anxiety often makes the anxiety worse. Trying not to feel anxious produces more anxiety. Trying not to think anxious thoughts makes them louder. ACT teaches patients to stop wrestling with these internal experiences and to focus instead on what they want their life to be about.
What it can feel like in practice
A patient might begin a session by describing a week of avoidance, declining a social event, leaving work early to avoid a meeting, not following up on an opportunity. In CBT, the conversation might focus on the catastrophic thoughts that drove the avoidance and on testing whether those thoughts were accurate. In ACT, the conversation might focus on what the patient actually values (connection, professional growth, contribution) and on whether their behavior is moving them toward those values or away from them.
The therapist might use specific exercises: the "passengers on the bus" metaphor (you're the driver; the difficult thoughts and feelings are passengers; they can shout from the back, but you decide where the bus goes), the "Chinese finger trap" metaphor (the harder you pull away from anxiety, the more it holds you), or mindfulness practices for noticing thoughts without engaging with them.
The evidence base
ACT has good evidence for anxiety disorders, though typically not as strong as the evidence for CBT specifically. Meta-analyses show effect sizes comparable to other evidence-based therapies. The advantage of ACT for some patients is durability: patients often continue to apply the framework after therapy ends, in ways that look like learned life skills rather than symptom management.
ACT also has evidence in patients with chronic pain, depression with anxious features, OCD (where the willingness-to-have-thoughts framing complements exposure work), and trauma-related conditions.
Who tends to benefit
A few patient profiles where ACT often fits.
Patients who have done CBT and improved but find that further thought-challenging feels exhausting or stuck.
Patients whose anxiety is partly about avoiding emotional experience itself.
Patients with chronic conditions (pain, illness) where the goal isn't to eliminate difficult experience but to live well with it.
Patients who respond well to metaphor and to a philosophical framing of psychological work.
Patients with values-conflicts at the center of their anxiety (anxious about a job that doesn't align with what matters to them, for example).
Who tends not to benefit
ACT isn't the typical first choice for severe panic disorder with frequent attacks, where interoceptive exposure is the more direct intervention. It's also not first-line for pure OCD, where exposure and response prevention is the first-line treatment supported by APA practice guidelines and is rarely outperformed by other approaches in head-to-head trials, or for patients in acute crisis who need symptom stabilization before doing the more philosophical work ACT involves. For these patients, starting with a more targeted CBT approach and considering ACT later is often the right sequence.
Finding an ACT therapist
The Association for Contextual Behavioral Science maintains a therapist directory specifically for ACT. Many CBT-trained therapists also integrate ACT into their work. As with any therapy, fit with the specific therapist matters more than the brand of therapy. The Society of Clinical Psychology summary of ACT is a useful clinician-facing overview of the evidence base.
Related: How CBT and SSRIs actually work for anxiety · Mindfulness-based therapies for anxiety · Exposure therapy, demystified