Lucy Napper

My research focuses on responses to health-risk information, attitude and behavior change, and the assessment of health-related cognition and behaviors. My research is grounded in models of social cognition, stages of change, social norms, and self-affirmation theory. I am currently pursuing several related lines of research. Firstly, I explore factors that influence perceptions of health risks and health behaviors. This includes the influence of peers and parents on substance use and sexual risk behaviors of emerging adults. Building on this line of research, I also study the efficacy of interventions aimed at reducing substance use and associated risks, including ways to promote effective parent communication about health risks during emerging adulthood.

My quantitative interests focus on psychometrics, including the development and evaluation of measures related to substance use, mental health, and sexual risk. For example, I am currently working on projects examining the assessment of hooking up outcomes, communication about substance use, and acculturation stress.

I have a joint appointment in the Health, Medicine, and Society Program, and I am also a member of the Lehigh Community Health Research Group. This group investigates health outcomes using a Community Based Participatory Research (CBPR) approach. CBPR is a collaborative approach to research that emphasizes working with the community to address health needs and disparities.

For more information, please email me at

Selected Publications

  • Earle, A. M., Napper, L. E., LaBrie. J. W., Brooks-Russell, A., Smith, D. J., & de Rutte, J. L. (2020). Examining interactions within the Theory of Planned Behavior in the prediction of intentions to engage in cannabis-related driving behaviors. Journal of American College Health, 68(4), 374-380.
  • Napper, L. E., Wolter, L. C., & Ebersole, D. S. (2020). ‘Mama don’t preach’: Young adults’ perceptions of maternal messages about underage drinking. Journal of Family Communication, 20(2), 160-174.
  • Harris, P. R., Griffin, D. W., Napper, L. E., Bond, R., Schüz, B. Stride, C., Brearley, I. (2019). Individual differences in self-affirmation: Distinguishing self-affirmation from positive self-regard. Self and Identity, 18(6), 589-630. 
  • Montes, K. & Napper, L. E. (2019). An examination of the direct and indirect effects of marijuana identity on marijuana use and consequences. Substance Use and Misuse, 54(8), 1286-1296.
  • Napper, L. E. (2019). Harm-reduction and zero-tolerance maternal messages about college alcohol use. Addictive Behaviors, 89, 136-142.
  • Zamboanga, B., Napper, L. E., George, A., & Olthuis, J. (2019). Examining drinking game harms as a function of gender and college student status. Psychology of Addictive Behaviors, 33(8), 685-696
  • Napper, L. E. (2018). Examining theoretical predictors of (mis)perceived alcohol norms. Journal of Studies on Alcohol and Drugs, 79(3), 474-480.
  • Napper, L. E., & Derby, A. (2018). Longitudinal associations between maternal disclosure of past alcohol use and underage college drinking. Psychology of Addictive Behaviors, 32(3), 301-308. 
  • Cervantes, R. C., Fisher, D. G., Padilla, A. M., & Napper, L. E. (2016). The Hispanic Stress Inventory Version 2: Improving the assessment of acculturation related stress. Psychological Assessment, 28(5), 506-522. doi: 10.1037/pas0000200
  • LaBrie, J. W., Earle, A.M., Boyle, S.C., Hummer, J.F., Montes, K., Turrisi, R, & Napper, L. E. (2016). A parent-based intervention reduces heavy episodic drinking among first-year college students. Psychology of Addictive Behaviors, 30(5), 523-535.
  • Napper, L. E., Froidevaux, N. M., & LaBrie, J. W. (2016). Being blunt about marijuana: Parent communication about marijuana with their emerging adult childrenPrevention Science, 17, 882-891.
  • Napper, L. E., Kenney, S. R., Hummer, J. F., Fiorot, S., & LaBrie, J. W. (2016). Longitudinal relationships among perceived injunctive and descriptive norms and marijuana use. Journal of Studies on Alcohol and Drugs, 77(3), 457-463.
  • Napper, L. E., Montes, K., Kenney, S. R., & LaBrie, J. W. (2016). Assessing the personal negative impacts of hooking up experienced by college students: Gender differences and mental health. Journal of Sex Research, 53(7), 766-775.  doi: 10.1080/00224499.2015.1065951
  • LaBrie, J. W., Napper, L. E., Grimaldi, E. M., Kenney, S. R., & Lac, A. (2015). The efficacy of a standalone protective behavioral strategies intervention for students accessing mental health services. Prevention Science, 16(5), 663-673. doi: 10.1007/s11121-015-0549-8
  • Napper, L. E., Hummer, J. F., Chithambo, T. P., & LaBrie, J. W. (2015). Perceived parent and peer marijuana norms: The moderating effect of parental monitoring during college. Prevention Science, 16, 364-373. doi: 10.1007/s11121-014-0493-z
  • Napper, L. E., Kenney, S. R., & LaBrie, J. W. (2015). The longitudinal relationships among injunctive norms and hooking up attitudes and behaviors in college students. Journal of Sex Research, 52(5), 499-506. doi: 10.1080/00224499.2014.952809
  • Kenney, S. R., Napper, L. E., Martens, M. P., & LaBrie, J. W. (2014). Examining the efficacy of a brief group protective behavioral strategies skills training intervention with college women. Psychology of Addictive Behaviors, 28(4), 1041-1051. doi: 10.1037/a0038173
  • LaBrie, J. W., Napper, L. E., & Hummer, J. F. (2014). Normative feedback for parents of college students: Piloting a parent based intervention to correct misperceptions of students’ alcohol use and other parents’ approval of drinking. Addictive Behaviors, 39, 107-113. doi: 10.1016/j.addbeh.2013.08.036
  • Napper, L. E., Harris, P. R., & Klein, W. M. P. (2014). Combining self-affirmation with the Extended Parallel Process Model: The consequences for motivation to eat more fruit and vegetables. Health Communication, 29, 610-618. doi: 10.1080/10410236.2013.791962
  • Napper, L. E., Hummer, J. F., Lac, A., & LaBrie, J. W. (2014). What are other parents saying? Perceived parental communication norms and the relationship between alcohol-specific parental communication and college student drinking. Psychology of Addictive Behaviors, 28, 31-41. doi: 10.1037/a0034496
  • Napper, L. E., Kenney, S. R., Lac, A., Lewis, L. J., & LaBrie, J. W. (2014). A cross-lagged panel model examining protective behavioral strategies: Are types of strategies differentially related to alcohol use and consequences? Addictive Behaviors, 39, 480-486. doi: 10.1016/j.addbeh.2013.10.020
  • LaBrie, J. W., Lewis, M. A., Atkins, D. C., Neighbors, C., Zheng, C., Kenney, S. R.., Napper, L. E., Walter, T., Kilmer, J. R., Hummer, J. F., Grossbard, J., Ghaidarov, T. M., Desai, S., Lee, C. M., & Larimer, M. E. (2013). Randomized control trial of web-based personalized normative feedback for college drinking prevention: Are typical student norms good enough? Journal of Consulting and Clinical Psychology, 81, 1074-1086. doi: 10.1037/a0034087
  • Cervantes, R. C., Fisher, D. G., Córdova, D., & Napper, L. E. (2012). The Hispanic Stress Inventory–Adolescent Version: A culturally informed psychosocial assessment. Psychological Assessment, 24, 187-196.
  • Napper, L. E., Fisher, D. G., & Reynolds, G. L. (2012). Development of the Perceived Risk of HIV Scale. AIDS and Behavior, 16, 1075-1083. doi: 10.1007/s10461-011-0003-2
  • Napper, L. E., Fisher, D. G., Reynolds, G. L., & Johnson, M. E. (2010). The effect of recall period on HIV risk behavior self-report reliability. AIDS and Behavior, 14, 152-161. doi:10.1007/s10461-009-9575-5.
  • Napper, L., Harris, P. R., & Epton, T. (2009). Developing and testing a self-affirmation manipulation. Self and Identity, 8, 45-62.
  • Harris, P. R., Mayle, K, Mabbott, L., & Napper, L. (2007). Self-affirmation reduces smokers’ defensiveness to graphic on-pack cigarette warning labels. Health Psychology, 26, 437-446.
  • Harris, P. R., & Napper, L. (2005). Self-affirmation and the biased processing of threatening health-risk information. Personality and Social Psychology Bulletin, 31, 1250-1263
lucy napper
Associate Professor
Interim Director of Undergraduate Studies
Chandler-Ullmann room 107
The University of Sheffield (United Kingdom), Ph.D. 2005
The University of Sheffield BSc, 2002 Psychology

Teaching Interests: 

Health Psychology
Psychology of Addictive Behaviors
Research Methods and Statistics