Jeffrey E. Young, PhD, is on the faculty in the Department of Psychiatry at Columbia University. He is the Founder and Director of the Cognitive Therapy Centers of New York and Connecticut, and the Schema Therapy Institute in New York City.

Janet S. Klosko, PhD, Codirector of the Cognitive Therapy Center of Long Island, in Great Neck, New York, is senior psychologist at the Schema Therapy Institute and at Woodstock Women's Health in Woodstock, New York.

Marjorie E. Weishaar, PhD, is Clinical Professor of Psychiatry and Human Behavior at Brown University Medical School, where she teaches cognitive therapy to psychiatry residents and to psychology interns and postdoctoral fellows. She also maintains a private practice in Providence, Rhode Island.