David A Clark, B.SC, MA, M.PHIL, PhD

Dr. David A. Clark, clinical psychologist, researcher, therapist and Professor Emeritus of Psychology at the University of New Brunswick, Canada received his formal training in behavior therapy and a PhD in 1984 at the Institute of Psychiatry, University of London, England. He then proceeded to postdoctoral research and clinical training under Dr. Aaron T. Beck at the Center for Cognitive Therapy, University of Pennsylvania. The author of 19 academic books and self-help workbooks on anxiety, depression and OCD, he has offered close to 100 training workshops globally on various facets of CBT. He has coauthored several books with Dr. Beck, the founder of cognitive therapy, including Cognitive Therapy of Anxiety Disorders: Science and Practice (Guilford, 2012) and The Anxiety & Worry Workbook: The Cognitive Behavioral Solution (2e, Guilford, 2023). Other publications include The Anxious Thoughts Workbook (2018, New Harbinger), The Negative Thoughts Workbook (New Harbinger, 2020), This is What Anxiety Looks Like (New Harbinger, 2024), and most recently Overcoming Paralyzing Doubt and Indecision (New Harbinger, 2026). He maintains a blog with Psychology Today called The Runaway Mind.

Speaker Disclosures:
Financial: David Clark receives royalties as a published author. He receives a speaking honorarium from PESI, Inc. He has no relevant financial relationships with ineligible organizations.
Non-financial: David Clark is a member of the International OCD Beliefs Working Group. He serves as an editorial board member for Canadian Psychologist and the Journal of Obsessive-Compulsive and Related Disorders. David Clark is a peer reviewer for several publications, for a complete list contact PESI, Inc.