Gloria Vanderhorst, Ph.D., is a Licensed Psychologist with over 35 years of experience. She is a trained mediator and Collaborative Divorce professional active in a number of professional organizations. She is the former Director of Child and Adolescent Services for the Chesapeake ADHD Center of Maryland and is currently in private practice in the Washington, DC area. As a Diplomate in the American College of Forensic Psychologists, she has testified in numerous cases regarding the best interest of the child. She is currently the co-editor of an on-line magazine, The World of Collaborative Practice.