A clinical psychologist licensed to practice in both Oklahoma and Arkansas, Dr. Lack is the author of more than thirty scientific publications relating to the assessment and treatment of psychological problems such as Obsessive-Compulsive Disorder, Tourette’s Syndrome, pediatric mood disorders, and posttraumatic stress. In addition, Dr. Lack has presented nationwide and internationally at conferences on a variety of topics, including children’s reactions to natural disasters, computer-based treatment of substance abuse, innovative teaching and training methods, and more. He is on the editorial board of several respected scientific journals as well as a peer-reviewer and a grant reviewer for national agencies.