Jodi Viljoen, PhD

Phone: 778-782-8638



Jodi L. Viljoen, Ph.D. is a Professor in the Department of Psychology in the Clinical and Law-Forensic areas, the Associate Director of the Institute for the Reduction of Youth Violence, and Area Coordinator for the Law-Forensic Psychology Program at SFU.

Dr. Viljoen’s research focuses on approaches for assessing and reducing risk of violence among adolescents. She has published over 100 articles, chapters, reports, and professional guides, and worked with justice and mental health agencies in various countries (Canada, the United States, the Netherlands, Norway, and the United Kingdom) to implement risk assessment and treatment-planning tools. Dr. Viljoen is an author of a risk and needs assessment tool for adolescents (Short-Term Assessment of Risk and Treatability: Adolescent Version; Viljoen, Nicholls, Cruise, Desmarais, & Webster, 2014), and an intervention-planning guide for adolescents (Adolescent Risk Reduction and Resilient Outcomes Work-Plan; Viljoen et al., 2014). Her research has been funded by the Michael Smith Foundation for Health Research (MSFHR), Social Sciences and Humanities Research Council of Canada (SSHRC), and Canadian Institutes for Health Research (CIHR). Dr. Viljoen is a member of Royal Society of Canada’s College of New Scholars; membership in the Royal Society is one of Canada’s highest academic honours.

Selected Representative Publications

Viljoen, J. L., Vargen, L. M., Cochrane, D. M., Jonnson, M. R., Goosens, I., & Monjazeb, S. (in press). Do structured risk assessments predict violent, any, and sexual offending better than unstructured judgment? An umbrella review. Psychology, Public Policy, and Law.

Viljoen, J. L., & Vincent, G. M. (2020). Risk assessments for violence and reoffending: Implementation and impact on risk management. Clinical Psychology: Science and Practice. Advance online publication.

Vincent, G. M., & Viljoen, J. L. (2020). Racist algorithms or systemic problems? Risk assessments and racial disparities. Criminal Justice and Behavior. Advance online publication.

Muir, N. M., Viljoen, J. L., Jonnson, M. R., Cochrane, D. M.., & Rogers, B. J. (2020). Predictive validity of the SAVRY with Indigenous and White female and male adolescents on probation. Psychological Assessment, 32(6), 594-607.

Viljoen, J. L., Bhanwer, A. K., Shaffer, C. S., & Douglas, K. S. (2020). Assessing protective factors for adolescent offending:  A conceptually-informed examination of the SAVRY and YLS/CMI. Assessment, 27(5), 959-975.

Viljoen, J. L., Jonnson, M. R., Cochrane, D. M., Vargen, L., & Vincent, G. M. (2019). Impact of risk assessment instruments on rates of pretrial detention, post-conviction placements, and release: A systematic review and meta-analysis. Law and Human Behavior, 43(5), 397-420.  

Viljoen, J. L., Cochrane, D. M., Shaffer, C. S., Muir, N. M, Brodersen, E., Rogers, B. J., Douglas, K. S., Roesch, R., McMahon, R. J., & Vincent, G. M. (2019). Bridging risk assessments to case plans: Development and evaluation of the ARROW intervention-planning tool for adolescents on probation. Criminal Justice and Behavior, 46(11), 1587–1610.

Jonnson, M. R., Bird, B. M., Li, S. M. Y., & Viljoen, J. L. (2019). The prevalence of sexual and gender minority youth in the justice system: A systematic review and meta-analysis. Criminal Justice and Behavior, 46(7), 999-1019.

Viljoen, J. L., Shaffer, C. S., Muir, N. M., Cochrane, D. M., & Brodersen, E. M. (2019). Improving case plans and interventions for adolescents on probation: The implementation of the SAVRY and a structured case planning form. Criminal Justice and Behavior, 46(1), 42-62.

Hanniball, K. B., Aknin, L. B., Douglas, K. S., Viljoen, J. L. (2019). Does helping promote well-being in at-risk youth and ex-offender samples? Journal of Experimental Social Psychology, 82, 307-317.

Shaffer, C. S., Adjei, J., Viljoen, J. L., Douglas, K. S., & Saewyc, E. M. (2018). Ten-year trends in physical dating victimization among adolescent boys and girls in British Columbia, Canada. Journal of Interpersonal Violence. Advance online publication.

Viljoen, J. L., Cochrane, D. M., & Jonnson, M. R. (2018). Do risk assessment tools help manage and reduce risk of violence and reoffending? A systematic review. Law and Human Behavior42(3), 181–214.

McLachlan, K., Gray, A. L., Roesch, R., Douglas, K. S., & Viljoen, J. L. (2018). An evaluation of the predictive validity of the SAVRY and YLS/CMI in justice-involved youth with Fetal Alcohol Spectrum Disorder. Psychological Assessment30(12), 1640–1651.

Viljoen, J. L., Gray, A. L., Shaffer, C., Bhanwer, A., Tafreshi, D., & Douglas, K. S. (2017). Does reassessment of risk improve predictions? A framework and examination of the SAVRY and YLS/CMI. Psychological Assessment, 29(9), 1096-1110.

Viljoen, J. L., Shaffer, C., Gray, A. L., & Douglas, K. S. (2017). Are adolescent risk assessment tools sensitive to change?  A framework and examination of the SAVRY and the YLS/CMI. Law and Human Behavior, 41(3), 244-257.