Lisa M. Hooper has published and has done research on the Parentification model, as one variations of the DDT (Hooper, 2007; Hooper at al., 2011a, 2011b).Luciano L’Abate has been responsible for resuscitating the DDT and for seeing the other models as related and derived in many ways from this model.Laura G. Sweeney has had a great deal of personal experience with the Parental Alienation Syndrome (PAS). She has published chapters on various paradigms and co-edited one book on Research on Writing Approaches in Mental Health with L’Abate (2011). Giovanna Gainesini has published in the area of Bullying. Peter Jankowski, is eminently qualified to write about the Stockholm Syndrome