Conferences
Dr. Shaffer has presented at scientific conferences in Canada, the United States, England, the Netherlands, Sweden, Belgium, Italy, Croatia, and the Czech Republic.
McIntyre, C., Kiddie, E., Edge Almond, M., Shaffer, C.S., Viljoen, J. L, & Douglas, K.S. (2025, October). Associations between mental health symptoms and physical intimate partner violence perpetration and victimization among justice-involved youth. Poster presented at the Annual Meeting of the Canadian Association of Threat Assessment Professionals, Whistler, BC.
Voronov, J., Lamons, M., Freeze, S., Blanchard, A. J. E., Shaffer, C. S., & Douglas, K (2025, March). Analyzing the interplay between firearm-related violence, gang involvement, victimization, and substance use frequency. Paper presented at the Annual Meeting of the American Psychology Law Society, Puerto Rico.
Hintz, W., Freeze, S., Blanchard, A. J. E., Shaffer, C. S., & Douglas, K. (2025, March). Identifying which preferred physical guns and ammo characteristics are associated with violence and gang membership. Poster presented at the Annual Meeting of the American Psychology Law Society, Puerto Rico.
Freeze, S. M., Blanchard, A. J. E., Shaffer, C. S., & Douglas, K. (2025, March). Examining the relative importance of individual and acquisition specific risk factors for firearm-related violence. Paper presented at the Annual Meeting of the American Psychology Law Society, Puerto Rico.
Shaffer, C. S., Descormiers, K., & Wilson, C. (2025, March). Subtypes of gang members in the Gang Intervention and Exiting Program. Paper presented at the Annual Meeting of the American Psychology Law Society, Puerto Rico.
Ho, R., Freeze, S., Douglas, K., Blanchard, A., & Shaffer, C. S. (2024, June). The association between mood disorders, comorbid substance use, and firearm-associated violence. Poster presented at the Annual Meeting of the International Association of Forensic Mental Health Services, San Francisco, CA.
Gelineau, M., Freeze, S., Blanchard, A., Shaffer, C. S., & Douglas, K. (2024, June). Violent offending with firearms: Effects of youth criminal justice system involvement, exposure to guns in childhood, and criminal sentiments. Poster presented at the Annual Meeting of the International Association of Forensic Mental Health Services, San Francisco, CA.
Matthew, S., McKenzie, B., Shaffer, C. S., Aknin, L., & Viljoen, J. (2024, March). Can asking people on probation about their strengths improve affect, alliance, engagement, motivation, and prosocial identity. Poster presented at the Annual Meeting of the American Psychology Law Society, Los Angeles, CA.
Freeze, S. M., Zamany, M., Edge Almond, Lamons, M. G., Blanchard, A., Shaffer, C.S. & Douglas, K. S. (2024, March). Examining the relationship between substance use, anger, and firearm-related violence. Paper presented at the Annual Meeting of the American Psychology Law Society, Los Angeles, CA.
Monjazeb, S., Edge Almond, M., Blanchard, A. J. E., Shaffer, C. S., & Douglas, K.S. (2024, March). Examining individual characteristics and risk of firearm-related violence among legal and illegal firearm owners. Paper presented at the Annual Meeting of the American Psychology Law Society, Los Angeles, CA.
Edge Almond, M., Hutchinson, E. L., Monjazeb, S., Freeze, S. M., Blanchard, A. J. E., Shaffer, C. S. & Douglas, K. S. (2024, March). Investigating the association between firearm carrying and firearm related violence and the moderating influence of individual characteristics and firearm exposure. Paper presented at the Annual Meeting of the American-Psychology Law Society, Los Angeles, CA.
Shaffer, C.S. (2024, February). Best practices for assessing and managing violence among adolescents. Presentation at the Annual Meeting of the American Association of Threat Assessment Professionals Winter Conference, Orlando, FL.
Edge Almond, M., Shaffer, C.S., & Douglas, K. S. (2023, October). Risk assessment and management measures for sexual violence among adolescents. Poster presented at the Annual Meeting of the Canadian Association of Threat Assessment Professionals, Whistler, BC.
Shaffer, C.S. (2023, October). Effective risk management of violence among adolescents. Presentation at the Annual Meeting of the Canadian Association of Threat Assessment Professionals, Whistler, BC.
Wessel, S., Viljoen, J. L., & Shaffer, C.S. (2023, June). Risk and protective factors in adolescent prostitution. Poster presented at the 5th North American Correctional and Criminal Justice Psychology Conference, Toronto, ON.
Shaffer, C. S., Descormiers, K., Warkentin, J., Dawson, K. & Wilson, C. (2023, February). The Gang Intervention and Exiting Program: Client risks, needs, and case management. In M. Bouchard (Chair), Social Networks, Organized Crime, and Gangs. Paper presented at the Annual Meeting of the Western Society of Criminology, Vancouver, BC.
Shaffer, C. S., Douglas, K. S., & Viljoen, J. L. (2022, March). Adolescent intimate partner violence: The case for outcome-specific and developmentally informed guidelines to evaluate and manage risk. Invited poster presented at the Annual Meeting of the American Psychology – Law Society, Denver, CO (2021 American Psychology-Law Society Dissertation Award Winner).
Shaffer, C. S., Edge, M. F., Hannibal, K. B., Douglas, K. S., & Viljoen, J. L. (2019, November). Best practices for responding to and preventing on-campus sexual violence. Poster presented at the Annual Meeting of the Canadian Association of Threat Assessment Professionals, Niagara on-the-Lake, ON.
Shaffer, C. S., Blanchard, A. J. E., Fuller, E. K., & Douglas, K. S. (2019, June). The impact of mental health and community structural characteristics on suicide-related behavior and self-harm among community respondents. Paper presented at the 19th Annual International Conference of Forensic Mental Health Services, Montreal, QC.
Shaffer, C. S., Gray, A.L., Douglas, K. S., & Viljoen, J. L. (2019, June). Systematic review of risk and protective factors associated with intimate partner violence perpetration and victimization among college students. Poster presented at the 19th Annual International Conference of Forensic Mental Health Services, Montreal, QC.
Shaffer, C. S., Cook, A. N., & Connolly, D. A. (2019, May). Should medical assistance in dying extend to persons with a mental disorder? In C. Sinclair (Chair), Medical assistance in dying: Practices and ethical challenges in Canada and around the world. Symposium presented at the 80th Annual Convention of the Canadian Psychological Association, Halifax, NS.
Shaffer, C. S., Gatner, D., Douglas, K. S., Viljoen, J. L., & McCuish, E. (2019, March). Role of psychopathic features in trajectories of intimate partner violence perpetration. Paper presented at the Annual Meeting of the American Psychology-Law Society, Portland, OR.
Shaffer, C. S., L., Cochrane, D., & Viljoen, J. L., Douglas, K. S. (2019, March). Dynamic risk and protective factors for intimate partner violence perpetration. Paper presented at the Annual Meeting of the American Psychology-Law Society, Portland, OR.
Fuller, E., Shaffer, C. S., Douglas, K. S., & Lyon, D. (2018, October). Risk factors for violence among teachers: Results from the 2017 British Columbia Teachers’ Federation Violence Against Teachers Survey. Poster presented at the Annual Meeting of the Canadian Association of Threat Assessment Professionals, Whistler, BC.
Shaffer, C.S., Douglas, K.S. & Viljoen, J. L. (2018, October). Risk assessment of dating violence among youth: Challenges and directions forward. Poster presented at the Annual Meeting of the Canadian Association of Threat Assessment Professionals, Whistler, BC.
Shaffer, C. S., Viljoen, J. L., & Douglas, K.S. (2018, October). A systematic review of risk factors and protective factors associated with adolescent dating violence. Poster presented at the Annual Meeting of the Canadian Association of Threat Assessment Professionals, Whistler, BC.
Muir, N., Viljoen, J. L., & Shaffer, C.S. (2018, June). Predictive validity of the SAVRY with Indigenous females and males in Canada. Paper presented at the 18th Annual International Conference of Forensic Mental Health Services, Antwerp, Belgium.
Vargen, L., Shaffer, C.S., & Viljoen, J. L. (2018, June). Association between psychopathic features and gang membership among female adolescents. Paper presented at the 18th Annual International Conference of Forensic Mental Health Services, Antwerp, Belgium.
Fuller, E., Shaffer, C. S., Muir, N., Cochrane, D., & Viljoen, J. L (2018, March). The professional use of SAVRY case-specific risk and protective factors: A content analysis. Poster presented at the Annual Meeting of the American Psychology-Law Society, Memphis, TN.
Shaffer, C. S., Douglas, K.S., Viljoen, J. L., & Saewyc, E. M. (2018, March). Sex differences in the trends and correlates of physical dating violence victimization among youth. Paper presented at the Annual Meeting of the American Psychology-Law Society, Memphis, TN.
Shaffer, C. S., McCuish, E., Douglas, K.S., Viljoen, J. L., & Corrado, R. (2018, March). Do mental disorders differentially predict trajectories of violent offending? Paper presented at the Annual Meeting of the American Psychology-Law Society, Memphis, TN.
Fuller, E. K., Shaffer, C. S., & Douglas, K. S. (2017, October). Violence against teachers: A literature review of implications for threat assessment. Poster presented at the Annual Meeting of the Canadian Association of Threat Assessment Professionals, La Malbaie, QC.
Corrado, R., McCuish, E., Mathesius, J., Shaffer, C. S., Doering, S., & Richards, P. (2017, August). Mental illness and violence: A Canadian perspective on a global issue. Symposia presented at the International Congress on the Identification and Prevention of Mental Illness and Interpersonal Violence, Stockholm, Sweden.
Mathesius, J., Shaffer, C. S., McCuish, E., Lussier, P., & Corrado, R. (2017, July). Examining the psychometric properties of the Cracow Instrument utilizing a prospective longitudinal sample of children in British Columbia, Canada. Paper presented at the 35th International Congress on Law and Mental Health, Prague, Czech Republic.
Mathesius, J., Lussier, P., Shaffer, C.S., McCuish, E., & Corrado, R. (2017, July). The Cracow Instrument: An examination of its historical origins, empirical development, and objects. Paper presented at the 35th International Congress on Law and Mental Health, Prague, Czech Republic.
Viljoen, J.L., Shaffer, C. S., Bhatt, G. Tweed, R., Hanniball, K., Aknin, L, Gagnon, N., Dooley, S., & Douglas, K. S. (2017, June). Does life satisfaction protect against adolescent offending? Paper presented at the 17th Annual International Conference of Forensic Mental Health Services, Split, Croatia.
Bhanwer, A., Viljoen, J. L., Shaffer, C. S., & Douglas, K. S. (2017, March). Does the SAPROF YV have incremental validity above the SAVRY in the prediction of aggression in youth? Poster presented at the Annual Meeting of the American Psychology-Law Society, Seattle, WA.
Jonnson, M., Shaffer, C. S., Viljoen, J. L., Douglas, K. S., Tweed, R. G., Gagnon, N., & Dooley, S. (2017, March). Protective factors against callous-unemotional traits in adolescents: The role of forgiveness, gratitude, and honesty. Poster presented at the Annual Meeting of the American Psychology-Law Society, Seattle, WA.
Gray, A. L., Shaffer, C. S., Bhanwer, A., Viljoen, J. L., & Douglas, K. S. (2016, June). Violent recidivism among adolescent offenders: An examination of the summary risk rating of the Structured Assessment of Violence Risk in Youth. Poster presented at the 77th Annual Convention of the Canadian Psychological Association, Victoria, BC.
Cochrane, D., Shaffer, C. S., Wessel, S., Spani, N., Dutchyn, R., & Viljoen, J. L. (2016, June). Delinquent peers, attitudes towards violence, and violent reoffending: A longitudinal test of social learning theory, differential association theory, and the interactional model. Poster presented at the 77th Annual Convention of the Canadian Psychological Association, Victoria, BC.
Bhanwer, A., Shaffer, C. S., Viljoen, J. L., & Douglas, K. S. (2016, June). The reliability and validity of the Inventory of Callous-Unemotional Traits in youth on probation. Poster presented at the 77th Annual Convention of the Canadian Psychological Association, Victoria, BC.
Viljoen, J. L., Gray, A. L., Shaffer, C. S., Tafreshi, D., Bhanwer, A., & Douglas, K. S. (2016, June). Does the reassessment of risk improve predictions of violence and offending? Paper presented at the 16th Annual International Conference of Forensic Mental Health Services, New York, NY.
Viljoen, J. L., Muir, N. M., Brodersen, E., Shaffer, C. S., & ARROW Advisory Board. (2016, June). The development and evaluation of the Adolescent Risk Reduction and Resilient Outcomes Work Plan risk management guide. Paper presented at the 16th Annual International Conference of Forensic Mental Health Services, New York, NY.
Shaffer, C. S., Douglas, K. S., & Viljoen, J. L. (2016, June). The relationship between psychopathic and borderline personality features and adolescent dating violence perpetration and victimization in a sample of adolescent offenders. Paper presented at the 16th Annual International Conference of Forensic Mental Health Services, New York, NY.
Shaffer, C. S., Gray, A. L., Viljoen, J. L., & Douglas, K. S. (2016, June). Are adolescent risk assessment tools useful for predicting dating violence? A prospective investigation of the Youth Level of Service/Case Management Inventory and Structured Assessment of Violence Risk in Youth. Paper presented at the 16th Annual International Conference of Forensic Mental Health Services, New York, NY.
Muir, N. M., Viljoen, J. L., Roesch, R., Gray, A. L., & Shaffer, C. S., (2016, June). History of foster care involvement as a risk factor for recidivism in justice-involved youth. Paper presented at the 16th Annual International Conference of Forensic Mental Health Services, New York, USA.
Schuberth, D., Shaffer, C.S., Viljoen, J. L., Douglas, K. S., & McMahon, R. J. (2016, March). The utility of psychopathic traits and comorbid internalizing problems in predicting psychosocial adjustment among a sample of Canadian youth on probation. Paper presented at the Annual Meeting of the American Psychology-Law Society, Atlanta, GA.
Viljoen, J. L., Gray, A. L., Shaffer, C. S., Bhanwer, A., Cruise, K. R.., Nicholls, T. L., & Desmarais, S. L. (2015, September). Are risk assessment tools equal? A comparison of the Structured Assessment of Violence Risk in Youth, Youth Level Service Needs/Case Management Inventory, and Short-Term Assessment of Risk and Treatability: Adolescent Version. Paper presented at the Young People and the Law: International Approaches to Care, Corrections, and Intervention Conference, Prato, Italy.
Viljoen, J. L., Shaffer, C. S., Muir, N. M., Brodersen, E., & ARROW Advisory Board. (2015, September). From risk assessment to intervention planning: Development and initial evaluation of the ARROW. Paper presented at the Young People and the Law: International Approaches to Care, Corrections, and Intervention Conference, Prato, Italy.
Wallach, L. N., Fuller, E. K., Shaffer, C. S., & Douglas, K. S. (2015, June). Predictors of antisocial desistance: A comparative analysis of community and correctional samples. Poster presented at the 3rd North American Correctional and Criminal Justice Psychology Conference, Ottawa, ON.
Viljoen, J., Gray, A. L., Shaffer, C.S., Bhanwer, A., & Douglas, K. S. (2015, June). Dynamic change in Structured Assessment of Violence Risk in Youth and the Youth Level Service Needs/Case Management Inventory scores: Does reassessment improve predictions? Paper presented at the 3rd North American Correctional and Criminal Justice Psychology Conference, Ottawa, ON.
Bhanwer, A., Shaffer, C. S., Gray, A. L.., Viljoen, J. L., & Douglas, K. S. (2015, June). The relationship between protective factors and reoffending in adolescents. Paper presented at the 3rd North American Correctional and Criminal Justice Psychology Conference, Ottawa, ON.
Shaffer, C. S., Bhanwer, A., Gray, A. L., Viljoen, J. L. Douglas, K. S. & Moretti, M. (2015, June). Improving the predictive accuracy of the Structured Assessment of Violence Risk in Youth: Do gender-relevant domains of risk add incrementally to the prediction of violent and nonviolent offending? Paper presented at the 3rd North American Correctional and Criminal Justice Psychology Conference, Ottawa, ON.
McCuish, E. C., Shaffer, C. S., & Corrado, R. R. (2015, June). Symptoms of psychopathy and the development of persistent violence across the life course. Paper presented at the 3rd North American Correctional and Criminal Justice Psychology Conference, Ottawa, ON.
Spani, M., Bordignon, L., Viljoen, J. L., Shaffer, C. S., Spani, N., Cochrane, D., & Wessel, S. (2015, June). The relationship between victimization, suicide-related behavior, and non-suicidal self-injury in adolescent offenders. Poster presented at the 15th Annual International Conference of Forensic Mental Health Services, Manchester, England.
Viljoen, J. L., Gray, A. L., Shaffer, C. S., & Douglas, K. S. (2015, March). What is the shelf-life of adolescent risk assessment? Dynamic change on the Structured Assessment of Violence Risk in Youth and Short-Term Assessment of Risk and Treatability: Adolescent Version. Paper presented at the Annual Meeting of the American Psychology-Law Society, San Diego, CA.
Shaffer, C. S., Blanchard, A. J. E., & Douglas, K. S. (2014, November). The relationship between mental health and violence and victimization: An environmental analysis. Poster presented at the 70th Annual Meeting of the American Society of Criminology, San Francisco, CA.
Shaffer, C. S., Gray, A. L., Douglas, K.S., Viljoen, J. L., Tweed, R., Bhatt, G., Gagnon, N., & Dooley, S. (2014, July). The influence of antisocial processes and prosocial connections on delinquency and gang attitudes : Part 2. Poster presented at the Youth Strengths and Prevention of Delinquency and Gang Involvement Conference, Surrey, BC.
Shaffer, C. S., Gray, A. L., Douglas, K.S., Viljoen, J. L., Tweed, R., Bhatt, G., Gagnon, N., & Dooley, S. (2014, July). The influence of antisocial processes and prosocial connections on delinquency and gang Attitudes : Part 1. Poster presented at the Youth Strengths and Prevention of Delinquency and Gang Involvement Conference, Surrey, BC.
Viljoen, J. L., Shaffer, C. S., Tweed, R., Bhatt, G., Douglas, K. S., Gray, A. L., Gagnon, N., & Dooley, S. (2014, July). Strengths in adolescent offenders and other at-risk adolescents. Paper presented at the Youth Strengths and Prevention of Delinquency and Gang Involvement Conference, Surrey, BC.
Wallach, L. N., Fuller, E. K., Shaffer, C. S., Lavioe, J. A. A. & Douglas, K. S. (2014, June). Predicting suicide and self-harm: Coping style, self-efficacy, and social support in civil psychiatric patients. Poster presented at the 75th Annual Convention of the Canadian Psychological Association, Vancouver, BC.
Gray, A. L., Shaffer, C. S., Viljoen, J. L., Douglas, K. S., Tweed, R. G., & Bhatt, G. (2014, June). The assessment and prediction of change in psychopathic traits among youth. Poster presented at the 75th Annual Convention of the Canadian Psychological Association, Vancouver, BC
Spani, M., Shaffer, C. S., & Viljoen, J. L. (2014, June). Mental health needs in gang-involved adolescent offenders. Poster presented at the 75th Annual Convention of the Canadian Psychological Association, Vancouver, BC.
Spani, M., Brown, J., Pankratz, C., Banford, M., Seida, L., Bordignon, L, Shaffer, C. S., & Viljoen, J. L. (2014, June). The relationship between the Developmental Assets Profile and depression and anxiety in adolescent offenders. Poster presented at the 14th Annual International Conference of Forensic Mental Health Services, Toronto, ON.
Shaffer, C. S., Brodersen, E., Viljoen, J. L. & Douglas, K. S. (2014, June). Comparing gang and non-gang involved male youth offenders: Differences in risk and protective factors on the Structured Assessment of Violence Risk in Youth and the Youth Level Service/Needs Case Management Inventory. Paper presented at the 14th Annual International Conference of Forensic Mental Health Services, Toronto, ON.
Shaffer, C. S., Viljoen, J. L., Douglas, K. S., Tweed, R. G., & Bhatt, G. (2014, June). Youth offending and positive attitudes towards gangs: The influence of prosocial connections in a male and female at-risk sample. Poster presented at the 14th Annual International Conference of Forensic Mental Health Services, Toronto, ON.
Fuller, E. K., Wallach, L. N., Shaffer, C. S., & Douglas, K. S. (2014, June). The relationship between treatment non-compliance, institutional infractions, and recidivism in a sample of Canadian provincial offenders. Poster presented at the 14th Annual International Conference of Forensic Mental Health Services, Toronto, ON.
Shaffer, C. S., Gray, A. L., Viljoen, J. L., Douglas, K. S., Tweed, R. G., & Bhatt, G. (2014, March). The predictive validity of the Antisocial Process Screening Device in male and female adolescents. Poster presented at the Annual Meeting of the American Psychology-Law Society, New Orleans, LA.
Shaffer, C. S., McCuish, E. C. & Corrado, R. R. (2013, November). Female young offenders and the association between early antisocial behavior and later criminal offending. Poster presented at the 69th Annual Meeting of the American Society of Criminology, Atlanta, GA.
Shaffer, C. S., Kantner, J., & Lindsay, D. S. (2013, August). The effects of feedback on recognition memory: Learning the experimenter’s design. Poster presented at the 121st Annual Convention of the American Psychological Association, Honolulu, HI.
Shaffer, C. S., & Douglas, K. S. (2013, June). Does gender moderate the relationship between mental health and violence? Evidence from a civil psychiatric patient sample in Canada. Poster presented at the 13th Annual International Conference of Forensic Mental Health Services, Maastricht, the Netherlands.
Shaffer, C. S., McCuish, E. Douglas, K. S., Viljoen, J. L., & Corrado, R. (2013, June). The relationship between psychopathy and prison perceptions in a sample of violent young offenders. Poster presented at the 5th Biennial Meeting of the Society of the Scientific Study of Psychopathy, Washington, DC.
Dr. Catherine S. Shaffer, Ph.D., C.F.C.P. 