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Thomas William Valente, PhD
Professor of Preventive Medicine
Institute for Health Promotion & Disease Prevention
SSB 302W 2001 N. Soto Street Health Sciences Campus Los Angeles
+1 323 442 8238


Thomas W. Valente, PhD, is a Professor in the Department of Preventive Medicine, 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 150 articles and chapters (as of June 2015) 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.


Fujimoto K, Snijders TA, Valente TW. Popularity Breeds Contempt: The Evolution of Reputational Dislike Relations and Friendships in High School. Soc Networks. 2017 Jan; 48:100-109. View in: PubMed

Jacobs W, Goodson P, Barry AE, McLeroy KR, McKyer EL, Valente TW. Adolescent Social Networks and Alcohol Use: Variability by Gender and Type. Subst Use Misuse. 2016 Dec 23; 1-11. View in: PubMed

Valente TW, Pitts SR. An Appraisal of Social Network Theory and Analysis as Applied to Public Health: Challenges and Opportunities. Annu Rev Public Health. 2016 Dec 15. View in: PubMed

Cobb NK, Jacobs MA, Wileyto P, Valente T, Graham AL. Diffusion of an Evidence-Based Smoking Cessation Intervention Through Facebook: A Randomized Controlled Trial. Am J Public Health. 2016 Jun; 106(6):1130-5. View in: PubMed

Gesell SB, Barkin SL, Sommer EC, Thompson JR, Valente TW. Increases in Network Ties Are Associated With Increased Cohesion Among Intervention Participants. Health Educ Behav. 2016 Apr; 43(2):208-16. View in: PubMed

Lajonchere CM, Wheeler BY, Valente TW, Kreutzer C, Munson A, Narayanan S, Kazemzadeh A, Cruz R, Martinez I, Schrager SM, Schweitzer L, Chklovski T, Hwang D. Strategies for Disseminating Information on Biomedical Research on Autism to Hispanic Parents. J Autism Dev Disord. 2016 Mar; 46(3):1038-50. View in: PubMed

Palinkas LA, Spear SE, Mendon SJ, Villamar J, Valente T, Chou CP, Landsverk J, Kellam SG, Brown CH. Measuring sustainment of prevention programs and initiatives: a study protocol. Implement Sci. 2016; 11(1):95. View in: PubMed

Everett MG, Valente TW. Bridging, brokerage and betweenness. Soc Networks. 2016 Jan; 44:202-208. View in: PubMed

Czaja SJ, Valente TW, Nair SN, Villamar JA, Brown CH. Characterizing implementation strategies using a systems engineering survey and interview tool: a comparison across 10 prevention programs for drug abuse and HIV sexual risk behavior. Implement Sci. 2016; 11(1):70. View in: PubMed

Valente TW, Dyal SR, Chu KH, Wipfli H, Fujimoto K. Diffusion of innovations theory applied to global tobacco control treaty ratification. Soc Sci Med. 2015 Nov; 145:89-97. View in: PubMed

Mercken L, Saul JE, Lemaire RH, Valente TW, Leischow SJ. Coevolution of Information Sharing and Implementation of Evidence-Based Practices Among North American Tobacco Cessation Quitlines. Am J Public Health. 2015 Sep; 105(9):1814-22. View in: PubMed

Chu KH, Sidhu AK, Valente TW. Electronic Cigarette Marketing Online: a Multi-Site, Multi-Product Comparison. JMIR Public Health Surveill. 2015 Jul-Dec; 1(2):e11. View in: PubMed

Wagner KD, Pitpitan EV, Valente TW, Strathdee SA, Rusch M, Magis-Rodriguez C, Chavarin CV, Patterson TL. Place of Residence Moderates the Relationship Between Emotional Closeness and Syringe Sharing Among Injection Drug Using Clients of Sex Workers in the US-Mexico Border Region. AIDS Behav. 2015 Jun; 19(6):987-95. View in: PubMed

Young SD, Belin TR, Klausner JD, Valente TW. Methods for measuring diffusion of a social media-based health intervention. Soc Netw. 2015 Apr; 4(2):41-46. View in: PubMed

Hunter RF, McAneney H, Davis M, Tully MA, Valente TW, Kee F. "Hidden" social networks in behavior change interventions. Am J Public Health. 2015 Mar; 105(3):513-6. View in: PubMed

Forster M, Grigsby TJ, Bunyan A, Unger JB, Valente TW. The protective role of school friendship ties for substance use and aggressive behaviors among middle school students. J Sch Health. 2015 Feb; 85(2):82-9. View in: PubMed

Kwan PP, Sussman S, Valente TW. Peer leaders and substance use among high-risk adolescents. Subst Use Misuse. 2015; 50(3):283-91. View in: PubMed

Valente TW, Palinkas LA, Czaja S, Chu KH, Brown CH. Social Network Analysis for Program Implementation. PLoS One. 2015; 10(6):e0131712. View in: PubMed

Chu KH, Valente TW. How different countries addressed the sudden growth of e-cigarettes in an online tobacco control community. BMJ Open. 2015; 5(5):e007654. View in: PubMed

Fujimoto K, Valente TW. Multiplex congruity: Friendship networks and perceived popularity as correlates of adolescent alcohol use. Soc Sci Med. 2015 Jan; 125:173-81. View in: PubMed

Chu KH, Hoeppner E, Valente T, Rohrbach L. A Social Network Analysis of a Coalition Initiative to Prevent Underage Drinking in Los Angeles County. Proc Annu Hawaii Int Conf Syst Sci. 2015 Jan; 2015:4356-4365. View in: PubMed

Dyal SR, Valente TW. A Systematic Review of Loneliness and Smoking: Small Effects, Big Implications. Subst Use Misuse. 2015; 50(13):1697-716. View in: PubMed

Hether HJ, Murphy ST, Valente TW. It's Better to Give Than to Receive: The Role of Social Support, Trust, and Participation on Health-Related Social Networking Sites. J Health Commun. 2014 Dec; 19(12):1424-39. View in: PubMed

Anderson N, Steinauer J, Valente T, Koblentz J, Dehlendorf C. Women's Social Communication About IUDs: A? Analysis. Perspect Sex Reprod Health. 2014 Sep; 46(3):141-8. View in: PubMed

Sussman S, Valente TW, Rohrbach LA, Dent CW, Sun P. Commentary-project towards no drug abuse: an evidence-based drug abuse prevention program. J Prim Prev. 2014 Aug; 35(4):233-7. View in: PubMed

Huang GC, Soto D, Fujimoto K, Valente TW. The interplay of friendship networks and social networking sites: longitudinal analysis of selection and influence effects on adolescent smoking and alcohol use. Am J Public Health. 2014 Aug; 104(8):e51-9. View in: PubMed

Huang GC, Unger JB, Soto D, Fujimoto K, Pentz MA, Jordan-Marsh M, Valente TW. Peer influences: the impact of online and offline friendship networks on adolescent smoking and alcohol use. J Adolesc Health. 2014 May; 54(5):508-14. View in: PubMed

Shin HS, Valente TW, Riggs NR, Huh J, Spruijt-Metz D, Chou CP, Ann Pentz M. The interaction of social networks and child obesity prevention program effects: The pathways trial. Obesity (Silver Spring). 2014 Feb 25. View in: PubMed

Park MM, Zafran H, Stewart J, Salsberg J, Ells C, Rouleau S, Estein O, Valente TW. Transforming mental health services: a participatory mixed methods study to promote and evaluate the implementation of recovery-oriented services. Implement Sci. 2014; 9(1):119. View in: PubMed

Fujimoto K, Valente TW. Alcohol peer influence of participating in organized school activities: a network approach. Health Psychol. 2013 Oct; 32(10):1084-92. View in: PubMed

Fujimoto K, Wang P, Valente TW. The Decomposed Affiliation Exposure Model: A Network Approach to Segregating Peer Influences from Crowds and Organized Sports. Netw Sci (Camb Univ Press). 2013 Aug 1; 1(2). View in: PubMed

Deguchi M, Valente T, Efird J, Oropeza M, Niederman R, Nigg CR. Hawai'i's silent epidemic: children's caries (dental decay). Hawaii J Med Public Health. 2013 Jun; 72(6):204-8. View in: PubMed

Brown CH, Mohr DC, Gallo CG, Mader C, Palinkas L, Wingood G, Prado G, Kellam SG, Pantin H, Poduska J, Gibbons R, McManus J, Ogihara M, Valente T, Wulczyn F, Czaja S, Sutcliffe G, Villamar J, Jacobs C. A computational future for preventing HIV in minority communities: how advanced technology can improve implementation of effective programs. J Acquir Immune Defic Syndr. 2013 Jun 1; 63 Suppl 1:S72-84. View in: PubMed

Valente TW, Fujimoto K, Soto D, Ritt-Olson A, Unger JB. A comparison of peer influence measures as predictors of smoking among predominately hispanic/latino high school adolescents. J Adolesc Health. 2013 Mar; 52(3):358-64. View in: PubMed

Chu KH, Wipfli H, Valente TW. Using Visualizations to Explore Network Dynamics. J Soc Struct. 2013; 14. View in: PubMed

Gesell SB, Barkin SL, Valente TW. Social network diagnostics: a tool for monitoring group interventions. Implement Sci. 2013; 8(1):116. View in: PubMed

Palinkas LA, Holloway IW, Rice E, Brown CH, Valente TW, Chamberlain P. Influence network linkages across implementation strategy conditions in a randomized controlled trial of two strategies for scaling up evidence-based practices in public youth-serving systems. Implement Sci. 2013; 8(1):133. View in: PubMed

Gotsis M, Wang H, Spruijt-Metz D, Jordan-Marsh M, Valente TW. Wellness partners: design and evaluation of a web-based physical activity diary with social gaming features for adults. JMIR Res Protoc. 2013; 2(1):e10. View in: PubMed

Fujimoto K, Valente TW. Decomposing the components of friendship and friends' influence on adolescent drinking and smoking. J Adolesc Health. 2012 Aug; 51(2):136-43. View in: PubMed

Ramírez-Ortiz G, Caballero-Hoyos R, Ramírez-López G, Valente TW. The effects of social networks on tobacco use among high-school adolescents in Mexico. Salud Publica Mex. 2012 Aug; 54(4):433-41. View in: PubMed

Valente TW. Network interventions. Science. 2012 Jul 6; 337(6090):49-53. View in: PubMed

Brown CH, Kellam SG, Kaupert S, Muthén BO, Wang W, Muthén LK, Chamberlain P, Povey CL, Cady R, Valente TW, Ogihara M, Prado GJ, Pantin HM, Gallo CG, Szapocznik J, Czaja SJ, McManus JW. Partnerships for the design, conduct, and analysis of effectiveness, and implementation research: experiences of the prevention science and methodology group. Adm Policy Ment Health. 2012 Jul; 39(4):301-16. View in: PubMed

Fujimoto K, Valente TW. Social network influences on adolescent substance use: Disentangling structural equivalence from cohesion. Soc Sci Med. 2012 Jun; 74(12):1952-60. View in: PubMed

Lakon CM, Valente TW. Social integration in friendship networks: The synergy of network structure and peer influence in relation to cigarette smoking among high risk adolescents. Soc Sci Med. 2012 May; 74(9):1407-17. View in: PubMed

Fujimoto K, Unger JB, Valente TW. A network method of measuring affiliation-based peer influence: assessing the influences of teammates' smoking on adolescent smoking. Child Dev. 2012 Mar; 83(2):442-51. View in: PubMed

Okamoto J, de Castro Buffington S, Cloum HM, Mendenhall BM, Toboni M, Valente TW. The influence of health knowledge in shaping political priorities: Examining HIV/AIDS knowledge and public opinion about global health and domestic policies. Glob Public Health. 2011 Dec; 6(8):830-42. View in: PubMed

Coronges K, Stacy AW, Valente TW. Social network influences of alcohol and marijuana cognitive associations. Addict Behav. 2011 Dec; 36(12):1305-8. View in: PubMed

Fujimoto K, Chou CP, Valente TW. The Network Autocorrelation Model using Two-mode Data: Affiliation Exposure and Potential Bias in the Autocorrelation Parameter. Soc Networks. 2011 Jul 1; 33(3):231-243. View in: PubMed

Okamoto J, Johnson CA, Leventhal A, Milam J, Pentz MA, Schwartz D, Valente TW. Social Network Status and Depression among Adolescents: An Examination of Social Network Influences and Depressive Symptoms in a Chinese Sample. Res Hum Dev. 2011; 8(1):67-88. View in: PubMed

Valente TW, Fujimoto K, Palmer P, Tanjasiri SP. A network assessment of community-based participatory research: linking communities and universities to reduce cancer disparities. Am J Public Health. 2010 Jul; 100(7):1319-25. View in: PubMed

Wipfli HL, Fujimoto K, Valente TW. Global tobacco control diffusion: the case of the framework convention on tobacco control. Am J Public Health. 2010 Jul; 100(7):1260-6. View in: PubMed

Valente TW, Fujimoto K. Bridging: Locating Critical Connectors in a Network. Soc Networks. 2010 Jul 1; 32(3):212-220. View in: PubMed

Mason MJ, Valente TW, Coatsworth JD, Mennis J, Lawrence F, Zelenak P. Place-based social network quality and correlates of substance use among urban adolescents. J Adolesc. 2010 Jun; 33(3):419-27. View in: PubMed

McBride CM, Bowen D, Brody LC, Condit CM, Croyle RT, Gwinn M, Khoury MJ, Koehly LM, Korf BR, Marteau TM, McLeroy K, Patrick K, Valente TW. Future health applications of genomics: priorities for communication, behavioral, and social sciences research. Am J Prev Med. 2010 May; 38(5):556-65. View in: PubMed

Wagner KD, Valente TW, Casanova M, Partovi SM, Mendenhall BM, Hundley JH, Gonzalez M, Unger JB. Evaluation of an overdose prevention and response training programme for injection drug users in the Skid Row area of Los Angeles, CA. Int J Drug Policy. 2010 May; 21(3):186-93. View in: PubMed

Sales AE, Estabrooks CA, Valente TW. The impact of social networks on knowledge transfer in long-term care facilities: Protocol for a study. Implement Sci. 2010; 5:49. View in: PubMed

Valente TW, Zogg JB, Christensen S, Richardson J, Kovacs A, Operskalski E. Using social networks to recruit an HIV vaccine preparedness cohort. J Acquir Immune Defic Syndr. 2009 Dec 1; 52(4):514-23. View in: PubMed

Mason MJ, Mennis J, Coatsworth JD, Valente TW, Lawrence F, Pate P. The Relationship of Place to Substance use and Perceptions of Risk and Safety in Urban Adolescents. J Environ Psychol. 2009 Dec 1; 29(4):485-492. View in: PubMed

Valente TW, Fujimoto K, Chou CP, Spruijt-Metz D. Adolescent affiliations and adiposity: a social network analysis of friendships and obesity. J Adolesc Health. 2009 Aug; 45(2):202-4. View in: PubMed

Myers R, Chou CP, Sussman S, Baezconde-Garbanati L, Pachon H, Valente TW. Acculturation and substance use: social influence as a mediator among Hispanic alternative high school youth. J Health Soc Behav. 2009 Jun; 50(2):164-79. View in: PubMed

Hether HJ, Huang GC, Beck V, Murphy ST, Valente TW. Entertainment-education in a media-saturated environment: examining the impact of single and multiple exposures to breast cancer storylines on two popular medical dramas. J Health Commun. 2008 Dec; 13(8):808-23. View in: PubMed

Valente TW, Coronges KA, Stevens GD, Cousineau MR. Collaboration and competition in a children's health initiative coalition: a network analysis. Eval Program Plann. 2008 Nov; 31(4):392-402. View in: PubMed

Caballero-Hoyos R, Torres-Lopez T, Pineda-Lucatero A, Navarro-Nuñez C, Fosados R, Valente TW. Between tradition and change: condom use with primary sexual partners among Mexican migrants. AIDS Behav. 2008 Jul; 12(4):561-9. View in: PubMed

Valente TW, Coronges K, Lakon C, Costenbader E. How Correlated Are Network Centrality Measures? Connect (Tor). 2008 Jan 1; 28(1):16-26. View in: PubMed

Valente TW, Pumpuang P. Identifying opinion leaders to promote behavior change. Health Educ Behav. 2007 Dec; 34(6):881-96. View in: PubMed

Hall JA, Valente TW. Adolescent smoking networks: the effects of influence and selection on future smoking. Addict Behav. 2007 Dec; 32(12):3054-9. View in: PubMed

Valente TW, Ritt-Olson A, Stacy A, Unger JB, Okamoto J, Sussman S. Peer acceleration: effects of a social network tailored substance abuse prevention program among high-risk adolescents. Addiction. 2007 Nov; 102(11):1804-15. View in: PubMed

Tanjasiri SP, Tran JH, Palmer PH, Valente TW. Network analysis of an organizational collaboration for Pacific Islander cancer control. J Health Care Poor Underserved. 2007 Nov; 18(4 Suppl):184-96. View in: PubMed

Valente TW, Murphy S, Huang G, Gusek J, Greene J, Beck V. Evaluating a Minor Storyline on ER About Teen Obesity, Hypertension, and 5 A Day. J Health Commun. 2007 Sep; 12(6):551-66. View in: PubMed

Hoffman BR, Monge PR, Chou CP, Valente TW. Perceived peer influence and peer selection on adolescent smoking. Addict Behav. 2007 Aug; 32(8):1546-54. View in: PubMed

Wilkin HA, Valente TW, Murphy S, Cody MJ, Huang G, Beck V. Does entertainment-education work with Latinos in the United States? Identification and the effects of a telenovela breast cancer storyline. J Health Commun. 2007 Jul-Aug; 12(5):455-69. View in: PubMed

Valente TW, Okamoto J, Pumpuang P, Okamoto P, Sussman S. Differences in perceived implementation of a standard versus peer-led interactive substance abuse prevention program. Am J Health Behav. 2007 May-Jun; 31(3):297-311. View in: PubMed

Valente TW, Chou CP, Pentz MA. Community coalitions as a system: effects of network change on adoption of evidence-based substance abuse prevention. Am J Public Health. 2007 May; 97(5):880-6. View in: PubMed

Valente TW. Opinion leader interventions in social networks. BMJ. 2006 Nov 25; 333(7578):1082-3. View in: PubMed

Valente TW. Need, demand, and external validity in dissemination of physical activity programs. Am J Prev Med. 2006 Oct; 31(4 Suppl):S5-7. View in: PubMed

Rohrbach LA, Grana R, Sussman S, Valente TW. Type II translation: transporting prevention interventions from research to real-world settings. Eval Health Prof. 2006 Sep; 29(3):302-33. View in: PubMed

Valente TW, Fosados R. Diffusion of innovations and network segmentation: the part played by people in promoting health. Sex Transm Dis. 2006 Jul; 33(7 Suppl):S23-31. View in: PubMed

Valente TW, Unger JB, Ritt-Olson A, Cen SY, Anderson Johnson C. The interaction of curriculum type and implementation method on 1-year smoking outcomes in a school-based prevention program. Health Educ Res. 2006 Jun; 21(3):315-24. View in: PubMed

Sussman S, Valente TW, Rohrbach LA, Skara S, Pentz MA. Translation in the health professions: converting science into action. Eval Health Prof. 2006 Mar; 29(1):7-32. View in: PubMed

Fonseca-Becker F, Valente TW. Promoting breastfeeding in Bolivia: do social networks add to the predictive value of traditional socioeconomic characteristics? J Health Popul Nutr. 2006 Mar; 24(1):71-80. View in: PubMed

Hoffman BR, Sussman S, Unger JB, Valente TW. Peer influences on adolescent cigarette smoking: a theoretical review of the literature. Subst Use Misuse. 2006; 41(1):103-55. View in: PubMed

Fosados R, Caballero-Hoyos R, Torres-López T, Valente TW. Condom use and migration in a sample of Mexican migrants: potential for HIV/STI transmission. Salud Publica Mex. 2006 Jan-Feb; 48(1):57-61. View in: PubMed

Valente TW, Unger JB, Johnson CA. Do popular students smoke? The association between popularity and smoking among middle school students. J Adolesc Health. 2005 Oct; 37(4):323-9. View in: PubMed

Boulay M, Valente TW. The selection of family planning discussion partners in Nepal. J Health Commun. 2005 Sep; 10(6):519-36. View in: PubMed

Agree EM, Biddlecom AE, Valente TW. Intergenerational transfers of resources between older persons and extended kin in Taiwan and the Philippines. Popul Stud (Camb). 2005 Jul; 59(2):181-95. View in: PubMed

Backer TE, Dearing J, Singhal A, Valente T. Writing with Ev--words to transform science into action. J Health Commun. 2005 Jun; 10(4):289-302. View in: PubMed

Ellen JM, Brown BA, Chung SE, Potterat JJ, Muth SQ, Valente TW, Padian NS. Impact of sexual networks on risk for gonorrhea and chlamydia among low-income urban African American adolescents. J Pediatr. 2005 Apr; 146(4):518-22. View in: PubMed

Moore KA, Peters RH, Hills HA, LeVasseur JB, Rich AR, Hunt WM, Young MS, Valente TW. Characteristics of opinion leaders in substance abuse treatment agencies. Am J Drug Alcohol Abuse. 2004; 30(1):187-203. View in: PubMed

Valente TW, Gallaher P, Mouttapa M. Using social networks to understand and prevent substance use: a transdisciplinary perspective. Subst Use Misuse. 2004; 39(10-12):1685-712. View in: PubMed

Stoebenau K, Valente TW. Using network analysis to understand community-based programs: a case study from highland Madagascar. Int Fam Plan Perspect. 2003 Dec; 29(4):167-73. View in: PubMed

Valente TW, Hoffman BR, Ritt-Olson A, Lichtman K, Johnson CA. Effects of a social-network method for group assignment strategies on peer-led tobacco prevention programs in schools. Am J Public Health. 2003 Nov; 93(11):1837-43. View in: PubMed

Valente TW. Diffusion of innovations. Genet Med. 2003 Mar-Apr; 5(2):69. View in: PubMed

Gross CP, Cruz-Correa M, Canto MI, McNeil-Solis C, Valente TW, Powe NR. The adoption of ablation therapy for Barrett's esophagus: a cohort study of gastroenterologists. Am J Gastroenterol. 2002 Feb; 97(2):279-86. View in: PubMed

Glik D, Nowak G, Valente T, Sapsis K, Martin C. Youth performing arts entertainment-education for HIV/AIDS prevention and health promotion: practice and research. J Health Commun. 2002 Jan-Feb; 7(1):39-57. View in: PubMed

Valente TW, Saba WP. Campaign exposure and interpersonal communication as factors in contraceptive use in Bolivia. J Health Commun. 2001 Oct-Dec; 6(4):303-22. View in: PubMed

Valente TW, Foreman RK, Junge B, Vlahov D. Needle-exchange participation, effectiveness, and policy: syringe relay, gender, and the paradox of public health. J Urban Health. 2001 Jun; 78(2):340-9. View in: PubMed

Valente TW, Vlahov D. Selective risk taking among needle exchange participants: implications for supplemental interventions. Am J Public Health. 2001 Mar; 91(3):406-11. View in: PubMed

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