Acceptance and Commitment Therapy — The Evidence for Defusion

The core idea

Acceptance and Commitment Therapy, developed by Steven Hayes and colleagues, is a third-wave cognitive-behavioural therapy. Its central move is cognitive defusion: instead of arguing with a thought ('that's not true'), the practitioner observes the thought as a thought ('I am having the thought that...').

The intuition is that the cost of a thought is not its content but the degree to which you believe it is you. Defusion reduces that fusion without requiring the thought to change.

Relevant research: Hayes et al., 2006 (Behaviour Research and Therapy).

Why it suits anxiety

Suppression — trying not to have a thought — reliably backfires. Reappraisal — trying to replace the thought with a more accurate one — works for some people but often becomes a rumination engine in anxiety-prone users. Defusion sidesteps both by changing your relationship to the thought rather than the thought itself.

The result: most of the evidence suggests defusion works at least as well as cognitive restructuring for anxiety, with fewer backfire modes in high-anxious users.

Relevant research: Hayes et al., 2006 (Behaviour Research and Therapy).

How Loam uses it

The Moment's technique-selection matrix routes anxiety prompts to ACT-inspired defusion language as the default. The guidance is written to name-the-thought-as-thought rather than to argue with it — which also keeps the session from becoming a CBT worksheet read aloud.

This is a therapeutic framework, not therapy. For persistent anxiety that interferes with daily life, a licensed therapist trained in ACT or CBT is the appropriate next step.