Acknowledgments

This treatment manual was authored by Dennis C. Daley, Ph.D., Western Psychiatric Institute and Clinic; Delinda Mercer, Ph.D., University of Pennsylvania; and Gloria Carpenter, M.Ed., University of Pennsylvania, under contract to the National Institute on Drug Abuse (NIDA). The Group Drug Counseling (GDC) model that serves as the basis of this manual was used in a large, multisite treatment research project entitled the Collaborative Cocaine Treatment Study (CCTS). Supported by NIDA and conducted over several years, the CCTS is one of the largest studies of the outpatient treatment of cocaine dependence ever conducted.

Numerous people helped make this comprehensive, methodologically rigorous study a success. Thanks to the investigators, project directors, counselors, and many others who participated in this clinical trial for their help and support of the GDC approach. Debra Grossman, M.A.; Lisa Onken, Ph.D.; and Melissa Racioppo, Ph.D., of NIDA, provided critical review and substantive comments on this manual.