David Yusko Psy DDavid Yusko, Psy.D., is a licensed clinical psychologist and co-founder of the Center for Anxiety & Behavior Therapy, in Bryn Mawr, Pennsylvania. He spent 10 years with the Center for the Treatment and Study of Anxiety at the University of Pennsylvana developing cognitive behavioral treatments for anxiety disorders with a particular emphasis on exposure-based therapies. Read More Read Less