Thomas William Valente, PhD

Professor of Population and Public Health Sciences

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Overview

Thomas W. Valente, PhD, is a Professor in the Department of Population and Public Health Sciences, Division of Health Behavior Research, Institute for Prevention Research, Keck School of Medicine, University of Southern California. He is author of Social Networks and Health: Models, Methods, and Applications (2010, Oxford University Press); Evaluating Health Promotion Programs (2002, Oxford University Press); Network Models of the Diffusion of Innovations (1995, Hampton Press); and over 250 articles and chapters (as of January 2024) on social networks, behavior change, and program evaluation. Valente uses social network analysis, health communication, and mathematical models to implement and evaluate health promotion programs designed to prevent tobacco and substance abuse, unintended fertility, and STD/HIV infections. He is also engaged in mapping community coalitions and collaborations to improve health care delivery and reduce healthcare disparities. He is currently working on specifications for network models of diffusion and contagion with the R package NetdiffuseR; and is also well-known for his work developing network models of program implementation and network interventions.

Education and Training

  • Annenberg School for Communication, Los Angeles — PhD — 06/1991 — Communication

Research Funding

  • Using Social Network Analysis to Understand Peer Influences on ENDS Use
    NIH · R01DA051843 · Sep 1, 2020 – Jul 31, 2025 · Role: Principal Investigator
  • The Global Diffusion of Tobacco Control
    NIH · R01CA157577 · May 1, 2012 – Mar 31, 2019 · Role: Principal Investigator
  • Integrating Social, Behavioral & Preventive Sciences to Reduce Children's Caries
    NIH · R34DE022272 · Sep 15, 2011 – Mar 31, 2014 · Role: Co-Principal Investigator
  • Social networks and networking that put adolescents at high risk
    NIH · RC1AA019239 · Sep 30, 2009 – Aug 31, 2012 · Role: Principal Investigator
  • IDU NETWORK AS REVEALED BY NEEDLE EXCHANGE DATA
    NIH · R29DA010172 · Sep 25, 1996 – Feb 28, 2002 · Role: Principal Investigator

Publications

  • Exposure to e-Cigarette Posts Across Social Media Platforms and Its Associations With Susceptibility and e-Cigarette Use: Comparative Cross-Sectional Study of High Schoolers in Jalisco (Mexico) and Southern California (United States). JMIR Pediatr Parent. 2026 Mar 13; 9:e85376.. View in PubMed
  • Imposter syndrome and alcohol use among graduate students: An exploratory study. Alcohol. 2026 02; 130:33-39.. View in PubMed
  • Increasing Equity Through Technology: A Comparison of Opinion Leader Identification Methods in Primary Care. Inquiry. 2025 Jan-Dec; 62:469580251370512.. View in PubMed
  • Impact of the Sources of Strength Peer Leader Program on Suicide Attempt Rates in 40 High Schools: A Cluster Randomized Controlled Trial. School Ment Health. 2026; 18(2):509-525.. View in PubMed
  • Network Dynamics of Social Influence on E-cigarette Use Among an Ethnically Diverse Adolescent Cohort. Nicotine Tob Res. 2025 Aug 22; 27(9):1583-1590.. View in PubMed
  • Social network influences on adolescent substance use: Exposure, perceptions, and ethnicity. Soc Sci Med. 2025 Sep; 381:118290.. View in PubMed
  • The Impact of Social Norms on Diffusion Dynamics: A Simulation of E-Cigarette Use Behavior. Health Educ Behav. 2025 08; 52(4):428-438.. View in PubMed
  • “We worked together to change things about our lives”: a longitudinal qualitative analysis exploring Hispanic/Latino and Somali immigrant health promoters’ perspectives on a social network intervention to address cardiovascular disease disparities. BMC Public Health. 2025 Mar 01; 25(1):826.. View in PubMed
  • Considerations for Social Networks and Health Data Sharing: An Overview. Ann Epidemiol. 2025 02; 102:28-35.. View in PubMed
  • Socio-ecological factors linked with changes in adults’ dietary intake in Los Angeles County during the peak of the coronavirus 2019 pandemic. Public Health Nutr. 2024 05 07; 27(1):e133.. View in PubMed