Ellyn and Peter co-founded The Couples Institute in 1986 and have an impressive legacy in couples therapy training. They are creators of The Developmental Model of Couples Therapy, a model that teaches therapists how to diagnose, intervene, and significantly help troubled relationships. They have presented workshops to therapists throughout the United States as well as Europe, Asia, South America, and Australia, and Ellyn currently conducts an online program that has trained professionals from over 60 countries.
Peter and Ellyn are authors of two books. Their first book, In Quest of the Mythical Mate, won the Clark Vincent Award by the California Association of Marriage & Family Therapists for its outstanding contribution to the field of marital therapy and has been reprinted over 20 times. Their second book, Tell Me No Lies, was written for the public and has been of critical help to many couples.