ACT

Steven Hayes · 1999

Key text: ACT (1999)

Cognitive-Behavioral Focus: Experiential + Skill Short-medium Individual + Group

Lineage: The Behavioral & Cognitive Lineage

Core Mechanism

Psychological flexibility through acceptance, defusion, present-moment awareness, values clarification, and committed action

Ontology

Psychological inflexibility: cognitive fusion and experiential avoidance narrow behavioral repertoire

Therapeutic Voice

"What if the goal isn't to get rid of the anxiety, but to take it with you toward what matters?"

View of the Person

A languaging being trapped by cognitive fusion and experiential avoidance, freed by contact with values

Evidence

Guidelines

APA Div 12: listed for chronic pain, depression

RCTs

150+ RCTs

Meta-analyses

A-Tjak et al. (2015); Gloster et al. (2020)

Notes

Rapidly growing evidence. Effective across multiple conditions.

Outcome Data

Anxiety Disorders

Effect: g = 0.57

~40-55% response

Gloster et al., 2020 (2020)

Depression & Mood Disorders

Effect: g = 0.56

~40-55% response

A-Tjak et al., 2015 (2015)

Chronic Pain & Somatic Symptoms

Effect: g = 0.37

~30-40% improvement

Hughes et al., 2017 (2017)

OCD & Related Disorders

Psychosis & Schizophrenia Spectrum

Substance Use & Addictions

Conditions

Anxiety Disorders Depression & Mood Disorders Chronic Pain & Somatic Symptoms OCD & Related Disorders Psychosis & Schizophrenia Spectrum Substance Use & Addictions Insomnia & Sleep Disorders Adult ADHD

Epistemology

EmpiricistPragmatistContemplative

Blind Spots

Acceptance framing can feel dismissive of legitimate suffering; metaphor-heavy approach may not land for all clients

Contraindications

Active psychosis with significant disorganization, severe cognitive impairment, situations requiring directive crisis intervention, clients who need concrete symptom management before values-based work

Training

Requirements

Graduate training + self-study. Workshops deepen experiential skills. Therapist psychological flexibility emphasized

Certification

ACBS offers trainer designation (not therapist cert)

Hours

Workshop: 16-24 hrs

Cost

$500-2K

Training Programs

ACBS ↗

Equity & Cultural Adaptations

Cross-cultural adaptationsLGBTQ+ affirming adaptationsMen's mental health adaptationsMilitary/veteran-specific adaptationsDisability/chronic illness affirming

Philosophical Roots

Pragmatism (James, Dewey — truth as workability); functional contextualism (Pepper); Buddhism (attachment as suffering, mindfulness); Skinner (radical behaviorism, reframed)