Ruth P. Newton, PhD, is a licensed clinical psychologist specializing in attachment and affect regulation in the developing child. She is also the supervising psychologist for Child and Mental Health Services at St. Vincent de Paul Village, a homeless rehabilitation center in downtown San Diego, and a training supervisor for master and doctoral-level interns. Newton is on the advisory board for the Attachment Institute at the University of California, San Diego, and is a member of the Technical and Professional Advisory Committee for the First 5 Commission of San Diego, an organization that funds programming for children five years of age and younger and their families. She works with children and adults in a private practice in La Jolla, CA, and is a longtime consultant for SAY San Diego's Extended Day Childcare program. She is a contributing author to Reader's Guide to Affect Regulation and Neurobiology and Play Therapy for Very Young Children.