David A Clark, PH.D.

David A. Clark, PhD , is a clinical psychologist, and professor emeritus at the University of New Brunswick in Canada. He is author of several books on depression and anxiety, including Overcoming Obsessive Thoughts , The Anxiety and Worry Workbook , The Anxious Thoughts Workbook , and The Negative Thoughts Workbook . He has coauthored several books with the pioneer of cognitive behavioral therapy (CBT), Aaron T. Beck, including Cognitive Therapy for Anxiety Disorders .

David A. Clark, PhD , is a clinical psychologist, and professor emeritus at the University of New Brunswick in Canada. He is author of several books on depression and anxiety, including Overcoming Obsessive Thoughts , The Anxiety and Worry Workbook , The Anxious Thoughts Workbook , and The Negative Thoughts Workbook . He has coauthored several books with the pioneer of cognitive behavioral therapy (CBT), Aaron T. Beck, including Cognitive Therapy for Anxiety Disorders . See less