CHARLES J. GELSO, PhD, is a professor in the Department of Psychology, University of Maryland, College Park. He has written extensively about the client/therapist relationship in diverse approaches to psychotherapy, and has conducted numerous empirical studies on the topic. Dr. Gelso has also practiced both brief and long-term psychodynamic therapy throughout his career.

JEFFREY A. HAYES, PhD, is an assistant professor of counseling psychology at Pennsylvania State University, University Park. His research and theoretical writing focus primarily on the psychotherapy relationship, with a particular emphasis on countertransference. He maintains a private psychotherapy practice in State College, Pennsylvania.