Dr. Laura is another popular media personality. She works primarily in radio but has also published a number of books. Laura Schlessinger (1947—) has a doctorate in physiology from Columbia University but also obtained a post-doctoral certificate in Marriage, Child, and Family Counseling from the University of Southern California. She states she was in private practice for twelve years. Dr. Laura is known for her socially conservative views and for combining moral, religious, and mental health considerations into her responses to viewers. This departs from the official practice of professional psychologists, who must distinguish between their personal and professional views when dealing with patients.