Research Summary

I am a clinical psychologist and Professor in the Department of Psychiatry at the University of California, San Francisco. In this role I am involved in clinical, research, and training activities. My clinical interests are in individual and group treatment for a variety of mental health issues, including anxiety, depression and addiction. I have extensive experience and expertise in brief treatment and long-term treatment models including cognitive-behavioral, motivational interviewing/enhancement, problem-solving, relaxation training, and 12-step interventions. My clinical and research interests include addressing health and mental health disparities among low-income populations, the LGBT community, and individuals impacted by HIV as well as integrating digital interventions into treatment.

My research focuses on the evaluation of clinical interventions for nicotine dependence, factors predictive of smoking treatment success, and development of Internet-based interventions for health behavior change. Much of my research focuses on populations experiencing tobacco-related health disparities including LGBT individuals, individuals with HIV disease, smokers with drug dependence, and low-income groups. I have conducted clinical trials evaluating the efficacy of internet-based and telephone-based smoking treatment for LGBT cigarette smokers. I recently led a study evaluating the efficacy and cost-effectiveness of smoking cessation treatment provided in HIV clinical care settings. Other work has focused on interventions with depressed smokers and the development of an extended smoking treatment model based on the conceptualization of nicotine dependence as a chronic, relapsing disorder.

Research Funding

  • August 1, 2017 - February 29, 2020 - A Facebook intervention for young sexual and gender minority smokers , Principal Investigator . Sponsor: NIH, Sponsor Award ID: R21MD011765
  • September 29, 1994 - May 31, 2016 - Treatment for Complex Patients: Continuing and Extended Care , Co-Investigator . Sponsor: NIH, Sponsor Award ID: P50DA009253
  • April 1, 1980 - May 31, 2016 - Maintaining Nonsmoking , Principal Investigator . Sponsor: NIH, Sponsor Award ID: R01DA002538
  • September 30, 2002 - May 31, 2007 - LGBT Internet Based Smoking Treatment , Principal Investigator . Sponsor: NIH, Sponsor Award ID: R01DA015791


Bowling Green State University, Ohio, BA, 1979, Psychology
DePaul University, Chicago, Illinois, MA, 1983, Clinical Psychology
DePaul University, Chicago, Illinois, PhD, 1987, Clinical Psychology

Selected Publications

  1. Vogel EA, Ramo DE, Prochaska JJ, Meacham MC, Layton JF, Humfleet GL. Problematic Social Media Use in Sexual and Gender Minority Young Adults: Observational Study. JMIR Ment Health. 2021 May 28; 8(5):e23688.  View on PubMed
  2. Vogel EA, Ramo DE, Meacham MC, Prochaska JJ, Delucchi KL, Humfleet GL. The Put It Out Project (POP) Facebook Intervention for Young Sexual and Gender Minority Smokers: Outcomes of a Pilot, Randomized, Controlled Trial. Nicotine Tob Res. 2020 08 24; 22(9):1614-1621.  View on PubMed
  3. Vogel EA, Humfleet GL, Meacham M, Prochaska JJ, Ramo DE. Sexual and gender minority young adults' smoking characteristics: Assessing differences by sexual orientation and gender identity. Addict Behav. 2019 08; 95:98-102.  View on PubMed
  4. Ramo DE, Meacham M, Thrul J, Belohlavek A, Sarkar U, Humfleet G. Exploring Identities and Preferences for Intervention Among LGBTQ+ Young Adult Smokers Through Online Focus Groups. J Adolesc Health. 2019 03; 64(3):390-397.  View on PubMed
  5. Vogel EA, Thrul J, Humfleet GL, Delucchi KL, Ramo DE. Smoking cessation intervention trial outcomes for sexual and gender minority young adults. Health Psychol. 2019 Jan; 38(1):12-20.  View on PubMed
  6. Hall SM, Humfleet GL, Gasper JJ, Delucchi KL, Hersh DF, Guydish JR. Cigarette Smoking Cessation Intervention for Buprenorphine Treatment Patients. Nicotine Tob Res. 2018 04 02; 20(5):628-635.  View on PubMed
  7. Gubner NR, Guydish J, Humfleet GL, Benowitz NL, Hall SM. Nicotine biomarkers and rate of nicotine metabolism among cigarette smokers taking buprenorphine for opioid dependency. Drug Alcohol Depend. 2017 09 01; 178:267-270.  View on PubMed
  8. Hall SM, Shi Y, Humfleet GL, Muñoz RF, Reus VI, Prochaska JJ. Smoking cessation abstinence goal in treatment-seeking smokers. Addict Behav. 2015 Mar; 42:148-53.  View on PubMed
  9. Grady ES, Humfleet GL, Delucchi KL, Reus VI, Muñoz RF, Hall SM. Smoking cessation outcomes among sexual and gender minority and nonminority smokers in extended smoking treatments. Nicotine Tob Res. 2014 Sep; 16(9):1207-15.  View on PubMed
  10. Barnett PG, Wong W, Jeffers A, Munoz R, Humfleet G, Hall S. Cost-effectiveness of extended cessation treatment for older smokers. Addiction. 2014 Feb; 109(2):314-22.  View on PubMed
  11. Lisha NE, Carmody TP, Humfleet GL, Delucchi KL. Reciprocal effects of alcohol and nicotine in smoking cessation treatment studies. Addict Behav. 2014 Mar; 39(3):637-43.  View on PubMed
  12. Humfleet GL, Hall SM, Delucchi KL, Dilley JW. A randomized clinical trial of smoking cessation treatments provided in HIV clinical care settings. Nicotine Tob Res. 2013 Aug; 15(8):1436-45.  View on PubMed
  13. Hendricks PS, Delucchi KL, Humfleet GL, Hall SM. Alcohol and marijuana use in the context of tobacco dependence treatment: impact on outcome and mediation of effect. Nicotine Tob Res. 2012 Aug; 14(8):942-51.  View on PubMed
  14. Hall SM, Humfleet GL, Muñoz RF, Reus VI, Prochaska JJ, Robbins JA. Using extended cognitive behavioral treatment and medication to treat dependent smokers. Am J Public Health. 2011 Dec; 101(12):2349-56.  View on PubMed
  15. Lawhon D, Humfleet GL, Hall SM, Muñoz RF, Reus VI. Longitudinal analysis of abstinence-specific social support and smoking cessation. Health Psychol. 2009 Jul; 28(4):465-72.  View on PubMed
  16. Humfleet GL, Delucchi K, Kelley K, Hall SM, Dilley J, Harrison G. Characteristics of HIV-positive cigarette smokers: a sample of smokers facing multiple challenges. AIDS Educ Prev. 2009 Jun; 21(3 Suppl):54-64.  View on PubMed
  17. Hall SM, Humfleet GL, Muñoz RF, Reus VI, Robbins JA, Prochaska JJ. Extended treatment of older cigarette smokers. Addiction. 2009 Jun; 104(6):1043-52.  View on PubMed
  18. Hendricks PS, Prochaska JJ, Humfleet GL, Hall SM. Evaluating the validities of different DSM-IV-based conceptual constructs of tobacco dependence. Addiction. 2008 Jul; 103(7):1215-23.  View on PubMed
  19. Prochaska JJ, Hall SM, Humfleet G, Munoz RF, Reus V, Gorecki J, Hu D. Physical activity as a strategy for maintaining tobacco abstinence: a randomized trial. Prev Med. 2008 Aug; 47(2):215-20.  View on PubMed
  20. Hall SM, Humfleet GL, Gorecki JA, Muñoz RF, Reus VI, Prochaska JJ. Older versus younger treatment-seeking smokers: differences in smoking behavior, drug and alcohol use, and psychosocial and physical functioning. Nicotine Tob Res. 2008 Mar; 10(3):463-70.  View on PubMed

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