Research Interests

Violence and offending (particularly during adolescence), risk assessment, risk management, treatment, protective factors

Selected Publications

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, 397-420. https://doi.org/10.1037/lhb0000344

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. Advance online publication. https://doi.org/10.1177/0093854819873019

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, 42-62. https://doi.org/10.1177/0093854818799379

Viljoen, J. L., Bhanwer, A. K., Shaffer, C. S., & Douglas, K. S. (2018). Assessing protective factors for adolescent offending:  A conceptually-informed examination of the SAVRY and YLS/CMI. Assessment. Advance online publication. https://doi.org/10.1177/1073191118768435

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 Behavior, 42, 181–214. https://doi.org/10.1037/lhb0000280

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, 244-257. https://doi.org/10.1037/lhb0000238