Barbara Campbell is an adjunct associate professor in the School of Public Health. She specializes in addictions treatment research, focusing on interventions that increase treatment engagement and retention, and improve the fidelity of treatment delivery. She also conducts research on smoking cessation and the effectiveness of anti-tobacco messages for individuals with co-occurring substance-use disorders. She is a co-investigator within the Western States Node of the National Drug Abuse Treatment Clinical Trials Network. She also is a licensed psychologist and practicing clinician in Portland. She provides mental health and substance abuse treatment services, as well as consultation and clinical training.