Philip Erdberg, Ph.D., A.B.P.P., is a diplomate in clinical psychology of the American Board of Professional Psychology and an internationally known expert in the assessment of personality disorders. He is a past-president of the Society for Personality Assessment and the 1995 recipient of the Society’s Distinguished Contribution Award. In 2001, Dr. Erdberg received the William T. Rossiter Award, presented by the California Forensic Mental Health Association, for outstanding achievement in the field of forensic mental health. He serves as a clinical and research consultant in a variety of therapeutic, educational, and correctional settings and is on the Curriculum Evaluation and Consultation Committee of the San Francisco Psychoanalytic Institute. Dr. Erdberg has conducted presentations on personality assessment and personality disorder throughout the world and is known for his clear organization, creative thinking, and sense of humor.