Diane Light, MA, psychotherapist, educator, and life coach for thirty years, developed Personality Integration Theory and Therapy, which reflect her belief in the Maturity Model ra...ver másDiane Light, MA, psychotherapist, educator, and life coach for thirty years, developed Personality Integration Theory and Therapy, which reflect her belief in the Maturity Model rather than the Pathology Model of psychotherapy. A former radio host of “Life Coaching Live,” she maintains a private practice in the Washington, DC area.ver menos