Henry J. Whitfield

Henry Whitfield is an Association of Contextual Behavioural Science (ACBS) Peer-reviewed Acceptance and Commitment Therapy trainer, an Accredited Advanced TIR (PTSD therapy) Trainer and Cognitive Behavioural Psychotherapist (MSc – CBT) He is now in the final stages of a PhD in psychedelic-assisted Acceptance and Commitment therapy, looking at interactions between psilocybin experiences and therapeutic processes during and after psilocybin.


For over seven years Henry ran and supervised brief therapy for PTSD projects for Victim Support and Mind in London gun crime hot spots, using CBT and TIR. Henry has also trained over 1500 psychological therapists since 2003, supervising mental health professionals the NHS for ACT and Trauma work, as well as having his own private practice. He is also a passionate integral thinker, publishing journal articles and book chapters on the integration of therapeutic models including, REBT-mindfulness, ACT-TIR-CBT, Person-centred-TIR. His psychedelic plant medicine path has changed how he does psychotherapy especially with self-concept issues. He has written, co-written and edited training manuals for ACT, TIR and FAP. He is also author of a new model of psychological flexibility A Spectrum of Selves, tailored to a psychedelic therapy context published 2021 in Frontiers in Psychiatry.