Abstract
Crisis Management in the Schools Summarized by Karen Lake, Predoctoral Intern, Psychological & Social Services, APPIC Internship Site, Dallas Independent School District, TX In an invited essay for Behaviour Research and Therapy, Anke Ehlers and David Clark (2000) discuss posttraumatic stress disorder as described in a cognitive model. Ehlers and Clark's cognitive model of posttraumatic stress disorder provides theoretical foundations for the symptoms of persistent PTSD as well as potentially helpful treatment implications.