Acceptance-Based Behavior Therapy
Core Mechanism
Reducing experiential avoidance of anxious internal states through mindful awareness and acceptance, combined with clarifying values and taking committed action, breaks the cycle of worry and behavioral restriction that maintains GAD
Ontology
Anxiety disorders, particularly GAD, are maintained by the struggle against internal experience. The problem is not anxiety itself but the avoidance of anxiety that narrows behavioral repertoire and prevents valued living.
Therapeutic Voice
"What would you do this week if anxiety weren't running the show? Not if it were gone. If it were still there and just wasn't the one deciding."
View of the Person
A being whose suffering is amplified by the attempt to control or eliminate internal experience. The path is not through reduction of anxiety but through expanding the capacity to have anxiety while living according to one's values.
Evidence
Not listed separately from ACT in most guidelines; APA Division 12 recognizes acceptance-based approaches for GAD
RCTs by Roemer, Orsillo & colleagues specifically for GAD; strong evidence base for primary target population
Included in broader ACT/acceptance-based meta-analyses; specific GAD evidence base robust
ABBT is listed separately from ACT because it was built for a single target, generalized anxiety disorder, and carries its own RCT program for it. GAD has historically been one of the more difficult anxiety disorders to treat, and Borkovec's finding that worry functions as avoidance of more distressing internal experience is the specific problem ABBT is engineered around. The explicit focus on valued living as an antidote to worry-driven avoidance is clinically distinctive. Worth knowing separately from ACT for clinicians who primarily treat anxiety disorders.
Conditions
Epistemology
Blind Spots
Substantial overlap with ACT makes independent identity difficult to maintain in the field; limited dissemination infrastructure compared to ACT; primarily validated for GAD rather than broad transdiagnostic application
Contraindications
Active psychosis, severe cognitive impairment, situations requiring immediate crisis intervention, clients who need concrete symptom reduction before acceptance-oriented work
Training
ACT training helpful foundation; ABBT-specific protocol training through Roemer and Orsillo workshops or self-study of treatment manuals
No formal certification; training through ACBS and workshop programs
2-3 day workshop plus supervised cases
$500-1500 for workshop training
Equity & Cultural Adaptations
Philosophical Roots
Hayes (acceptance and commitment; contextual behavioral science); Kabat-Zinn (mindfulness-based stress reduction); Borkovec (GAD as cognitive avoidance); behavioral learning theory; Buddhist psychology (non-judgmental awareness)
Related Modalities
Test Yourself
How is ABBT different from ACT?
Show answer
ABBT was developed specifically for generalized anxiety disorder and integrates more explicitly with traditional behavioral therapy techniques and the GAD literature. While ACT is transdiagnostic and emphasizes psychological flexibility through six core processes, ABBT has a tighter focus on the mechanisms specific to worry and GAD, particularly the role of experiential avoidance in maintaining anxiety. Both share mindfulness and acceptance foundations, but ABBT has its own RCT evidence base and protocol. Roemer and Orsillo were a separate research group rather than part of Hayes's, but ABBT draws on ACT openly; it is not a case of two labs arriving at the same place without contact.