A Liberated Mind (Steven C. Hayes, 2019)
A Liberated Mind: How to Pivot Toward What Matters, Steven C. Hayes, Avery/Penguin 2019 — the trade-press statement of acceptance-and-commitment-therapy for general readers. T3, and the weakness is specific: the Wikipedia entry it was recorded from confirms the book exists, its publisher and year, and documents Hayes’s research programme thoroughly, but gives no account of what this book argues. What follows is about the therapy the book popularises, not the book. Same failure mode as the-trouble-with-testosterone, one rung less severe because the underlying programme is well documented.
What is established
Hayes co-developed ACT — mindfulness, acceptance, and values-based methods — and separately built Relational Frame Theory as an account of human higher cognition, with roughly 300 studies testing its concepts. He is Nevada Foundation Professor at the University of Nevada, Reno, teaching in its behaviour-analysis PhD programme.
The number that matters to this spoke: over 900 randomized controlled trials have tested ACT. The World Health Organization distributes ACT-based stress-management resources internationally, and both the American Psychological Association and the US Department of Veterans Affairs list it as empirically supported.
Why the trial count is the finding, and also a question
The founding corpus set a method spectrum running from psychophysics through survey work to clinical interpretation, with the clinical end understood as the least testable. ACT breaks that ordering. It is a clinical therapy — the same category as the-middle-passage and staring-at-the-sun — carrying a randomized-trial base larger than anything else in this wiki, human-mouse-perceptual-maps included. “Clinical” turns out not to name a position on the evidence spectrum at all.
The open question this spoke has to hold. A count of 900 trials is a count, and this corpus has a standing replication-crisis caveat that applies with particular force to psychotherapy research, where small samples and researcher-allegiance effects are known problems and where the person who developed the therapy is often an author on the trials. Wikipedia reports the number and, per its own framing, no criticism of ACT’s evidence base — which is a fact about the encyclopedia entry, not about the literature. The spoke holds no source assessing trial quality. Recorded as a gap, not as doubt: the honest position is that ACT’s evidence base is much larger than its clinical siblings’ and unexamined here.
Related
steven-hayes · acceptance-and-commitment-therapy · replication-crisis · staring-at-the-sun · burnout-stress-cycle · synthesis