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ACT · 6 min read

Acceptance and Commitment Therapy

Stop fighting your inner experience; start moving toward what matters.

Originator: Steven C. Hayes, Kirk Strosahl, Kelly Wilson (1980s–90s)Best for: Chronic pain · Depression · Anxiety · OCD · Workplace stress · Existential distress

Core idea

ACT (said as one word, not the letters) is a third-wave behavioral therapy built on Relational Frame Theory. It targets psychological inflexibility — the rigid struggle with thoughts and feelings that pulls people away from a meaningful life. The goal is not symptom reduction but workability: doing what matters, with whatever shows up internally. Six processes form the hexaflex of psychological flexibility.

Key concepts

Psychological flexibility
Being present, open, and engaged in values-aligned action.
Cognitive fusion
Treating thoughts as literal truth rather than as mental events.
Experiential avoidance
Efforts to escape or control inner experience that paradoxically increase suffering.
Self-as-context
The observing self — the noticer behind the noticed.
Values vs. goals
Values are directions (be a caring partner); goals are destinations (have a date Friday).
Creative hopelessness
Helping the client notice that their control strategies aren't working — gently.

What a session looks like

  1. 1
    Open
    Brief mindfulness or present-moment exercise.
  2. 2
    Workability check
    What did you try this week? Did it move you toward your values or away?
  3. 3
    Hexaflex work
    Pick one or two processes — defusion, acceptance, values clarification, committed action.
  4. 4
    Experiential exercise
    Leaves on a stream, milk-milk-milk, passengers on the bus, etc.
  5. 5
    Committed action
    Specific, values-linked behavior between sessions.

Signature techniques

Defusion
Add space between you and the thought — sing it, name the story, repeat the word until it loses meaning.
Leaves on a stream
Visualize thoughts floating past on leaves — practice noticing without grabbing.
Values card sort
Sort 40–60 values into very/somewhat/not important; clarify life directions.
Passengers on the bus
Metaphor: you drive toward your values while difficult thoughts/feelings ride along loudly.
Choice point
Quick worksheet — what triggered me, did I move toward or away from values, what next?

Evidence base

150+ RCTs. APA Division 12 lists ACT as research-supported for chronic pain, depression, OCD, psychosis (adjunct), and mixed anxiety. Generally equivalent to CBT in head-to-head trials; sometimes superior for chronic conditions where elimination of symptoms isn't realistic.

Common pitfalls

  • ▸Becoming too metaphor-heavy; clients need to land in their actual life.
  • ▸Skipping creative hopelessness — values work falls flat if avoidance hasn't been examined.
  • ▸Treating acceptance as resignation rather than active openness.
  • ▸Defusion-only therapy — flexibility requires all six processes working together.
Option One

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Option Two

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Where to go next

ACT Made Simple
Russ Harris
The single best starting point — practical, warm, clinician-focused.
Acceptance and Commitment Therapy (2nd ed.)
Hayes, Strosahl, Wilson
The original — denser but foundational.
Get Out of Your Mind and Into Your Life
Steven Hayes
Client-facing workbook.