The Paradigm Developmental Model of Treatment - Paperbackby Lcsw Georgi DiStefano (Author), Melinda Hihman (Author) The Paradigm Developmental Model of Treatment (PDMT) was developed by the first author over the course of more than 30 years of private practice working with chemically dependent and substance abusing clients. In 2004, the model was first outlined. In 2005 a presentation was made to the professional community at a Grand Rounds sponsored by Sharp Mesa Vista Hospital, San Diego. In the following