World Conference 2026 Program Co-Chairs

Jacqueline A-Tjak, Ph.D. is a registered Clinical Psychologist and Psychotherapist and has worked in inpatient and outpatient facilities in the Netherlands, with patients with different kinds of disorders. She was trained in CBT and is a Supervisor with the VGCt. She started her training in ACT in 2004, is a peer reviewed ACT trainer, and a ACBS Fellow. She attended almost all World conferences since 2006. In her PhD research she compared the efficacy of CBT with ACT for depression.

Dr. Jean-Christophe Seznec is a psychiatrist, former head of clinic, sports medicine physician, lecturer, author of numerous books on ACT, and blogger. He was the president of the French ACT chapter. He teaches meditation and has developed several programs for phone apps, as well as ACT. He teaches at numerous universities. He is a member of the scientific committee of Santé Publique France for the development of soft skills in adolescents, of InspiR, which implements soft skills programs for adolescents, and of La Vie Kintsugi, for the development of health coaching in cancer. He is a specialist in trichotillomania and sports psychologie. He is a member of the medical committee of the French Rugby Federation. He is a trained clown and developed ACT through clowning.

Please submit here if you're a member interested in reviewing submissions for the conference.  Oral submission reviewing occurs during the last 2 weeks of February, poster reviewing occurs during the last 2 weeks of March.