December 11, 2025
The Importance of Trauma-Informed Practice (TIP) Education and Training Across Canada
Hugues Hervé & Daniel G. Derksen Trauma-Informed Practice (TIP) has become a national priority across policing, child protection, victim services, healthcare, and justice sectors.1 2 While the overarching goal of TIP is to reduce harm to trauma survivors and prevent re-traumatization, the responsibilities placed on frontline investigators and interviewers have grown more complex. TIP today is not simply about understanding trauma in theory — it is about using that knowledge in real-world interactions where memory, safety, communication, and credibility often intersect. This is especially critical in forensic interviewing, where trauma can shape how information is recalled, expressed, or withheld, and where misinterpretation can have life-changing consequences. Trauma-Informed Practice in a Changing Canadian Landscape In recent years, Canada has strengthened its commitment to trauma-informed services across systems. The Government of Canada’s 2025 systemic investigation into survivor experiences of sexual violence highlighted a number of persistent challenges within justice and policing responses, including survivors feeling dismissed, misunderstood, or unsafe during reporting and investigative processes.2 Trauma-informed approaches — particularly those that improve communication, predictability, and emotional safety — are essential for building survivor trust and reducing systemic barriers to reporting.3 These national findings align with what frontline professionals have long recognized: trauma shapes how people remember events, how they present emotionally and behaviourally, and how they engage with investigators. TIP training must therefore prepare practitioners not only to understand these impacts, but to adapt their interviewing strategies accordingly. Understanding Trauma’s Impact on Memory and Presentation TIP education often covers the neurobiological effects of trauma — information that is essential for reducing bias and helping interviewers understand why a survivor’s recall may be fragmented, non-linear, or difficult to express. This knowledge is foundational. Trauma can affect:- Attention and memory encoding, leading to gaps in narrative memory reports.4 5 6
- Retrieval, leading to narratives that are non-linear and difficult to organize.7 8 9 10 11 12
- Emotion and physiology, leading to various bodily responses such as dissociation, “shutting down”, and/or hyper-arousal (e.g., increased or variable heart rate)13 14 15 16 17
- Behaviours, leading to lack of emotional expression (flat affect), irritability or anger, laughter, inconsistent recall, or active avoidance.18 19 20 21 22 23
- Limited budgets for advanced or specialized training
- Inconsistent access to peer review or supervision needed to support skill development
- TIP programs that teach “what trauma does” but not “what interviewers can do differently”
- Compliance-driven “checklist TIP” rather than integrated interviewing practice
- British Columbia mandates Trauma-Informed Practice Foundations Curriculum (or approved equivalent) for all front-line officers, supervisors, and Independent Investigations Office investigators, with mandatory TIP updates every three years, at a minimum.24
- Saskatchewan’s Moose Jaw Police Service requires 40 hours of TIP training for victim services volunteers.25
- New Brunswick’s Woodstock Police Force has updated sexual-assault investigation policies to ensure trauma-informed and unbiased investigative procedures.26
- Safety — Create physical, emotional, and procedural safety so the individual does not experience the interview as a threat.
- Predictability — Reduce uncertainty by explaining what will happen, why it will happen, and how the interview will unfold.
- Empowerment — Offer meaningful choice and control, supporting agency — especially critical for survivors of interpersonal violence.
- Compassion — Communicate respect and genuine care, reducing shame and supporting engagement without compromising neutrality.
References
- Royal Canadian Mounted Police. (2022, May 4). The way forward II – An update on the implementation of the RCMP’s sexual assault review and victim support action plan. Retrieved from https://www.rcmp-grc.gc.ca/en/the-way-forward-ii-an-update-the-implementation-the-rcmps-sexual-assault-review-and-victim-support?wbdisable=true
- The Office of the Federal Ombudsperson for Victims of Crime. (2025). Rethinking justice for survivors of sexual violence: A systemic investigation. Government of Canada. Retrieved from https://www.canada.ca/content/dam/ofovc-ofvac/documents/sissa/OFOVC_Rethinking_Justice_Report_20251119
- Haskell, L., & Randall, M. (2019). The impact of trauma on adult sexual assault victims. Justice Canada. Link to full text.
- Johnsen, G. E., & Asbjørnsen, A. E. (2008). Consistent impaired verbal memory in PTSD: A meta-analysis. Journal of Affective Disorders, 111(1), 74–82. https://doi.org/10.1016/j.jad.2008.02.007
- Petzold, M. B., & Bunzeck, N. (2022). Impaired episodic memory in PTSD patients—A meta-analysis of 47 studies. Frontiers in Psychiatry, 13, 909442. https://doi.org/10.3389/fpsyt.2022.909442
- Scott, J. C., Matt, G. E., Wrocklage, K. M., Crnich, C., Jordan, J., Southwick, S. M., Krystal, J. H., & Schweinsburg, B. C. (2015). A quantitative meta-analysis of neurocognitive functioning in posttraumatic stress disorder. Psychological Bulletin, 141(1), 105–140. https://doi.org/10.1037/a0038039
- Bedard-Gilligan, M., & Zoellner, L. A. (2012). Dissociation and memory fragmentation in posttraumatic stress disorder: An evaluation of the dissociative encoding hypothesis. Memory, 20(3), 277–299. https://doi.org/10.1080/09658211.2012.655747
- Bedard-Gilligan, M., Zoellner, L. A., & Feeny, N. C. (2017). Is trauma memory special? Trauma narrative fragmentation in PTSD: Effects of treatment and response. Clinical Psychological Science, 5(2), 212–225. https://doi.org/10.1177/2167702616676581
- Engelhard, I. M., McNally, R. J., & van Schie, K. (2019). Retrieving and modifying traumatic memories: Recent research relevant to three controversies. Current Directions in Psychological Science, 28(1), 91–96. https://doi.org/10.1177/0963721418807728
- Jelinek, L., Randjbar, S., Seifert, D., Kellner, M., & Moritz, S. (2009). The organization of autobiographical and nonautobiographical memory in posttraumatic stress disorder (PTSD). Journal of Abnormal Psychology, 118(2), 288–298. https://doi.org/10.1037/a0015633
- McNally, R. J. (2005). Debunking myths about trauma and memory. Canadian Journal of Psychiatry, 50(13), 817–822. https://doi.org/10.1177/070674370505001302
- Davis, D., Hogan, A. A., & Hart, D. J. (2024). Myths of trauma memory: On the oversimplification of effects of attention narrowing under stress. Frontiers in Psychology, 15, 1294730. https://doi.org/10.3389/fpsyg.2024.1294730
- American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.)
- Frewen, P. A., & Lanius, R. A. (2014). Trauma-related altered states of consciousness: Exploring the 4-D model. Journal of Trauma & Dissociation, 15(4), 436–456. https://doi.org/10.1080/15299732.2013.873377
- Ge, F., Yuan, M., Li, Y., & Zhang, W. (2020). Posttraumatic stress disorder and alterations in resting heart rate variability: A systematic review and meta-analysis. Psychiatry Investigation, 17(1), 9–20. https://doi.org/10.30773/pi.2019.0112
- Nagpal, M. L., Gleichauf, K., & Ginsberg, J. P. (2013). Meta-analysis of heart rate variability as a psychophysiological indicator of posttraumatic stress disorder. Journal of Trauma & Treatment, 3(1), 182. https://doi.org/10.4172/2167-1222.1000182
- Pole, N. (2007). The psychophysiology of posttraumatic stress disorder: A meta-analysis. Psychological Bulletin, 133(5), 725–746. https://doi.org/10.1037/0033-2909.133.5.725
- Frewen, P. A., Dozois, D. J., Neufeld, R. W., Lane, R. D., Densmore, M., Stevens, T. K., & Lanius, R. A. (2012). Emotional numbing in posttraumatic stress disorder: A functional magnetic resonance imaging study. Journal of Clinical Psychiatry, 73(4), 431–436. Retrieved from https://www.psychiatrist.com/wp-content/uploads/2021/02/13267_emotional-numbing-posttraumatic-stress-disorder-functional.pdf
- Li, G., Wang, L., Cao, C., Fang, R., Chen, C., Qiao, X., Yang, H., Hall, B. J., & Elhai, J. D. (2020). An item-based analysis of PTSD emotional numbing symptoms in disaster-exposed children and adolescents. Journal of Abnormal Child Psychology, 48(10), 1303–1311. https://doi.org/10.1007/s10802-020-00677-w
- Zhan, N., Li, F., Fung, H. W., Zhang, K., Wang, J., & Geng, F. (2024). A symptom-level perspective on irritability, PTSD, and depression in children and adults. Journal of Affective Disorders, 367, 606–616. https://doi.org/10.1016/j.jad.2024.08.213
- Keltner, D., & Bonanno, G. A. (1997). A study of laughter and dissociation: Distinct correlates of laughter and smiling during bereavement. Journal of Personality and Social Psychology, 73(4), 687–702. https://doi.org/10.1037/0022-3514.73.4.687
- van Giezen, A. E., Arensman, E., Spinhoven, P., & Wolters, G. (2005). Consistency of memory for emotionally arousing events: A review of prospective and experimental studies. Clinical Psychology Review, 25(7), 935–953. https://doi.org/10.1016/j.cpr.2005.04.011
- Hetzel-Riggin, M. D., & Meads, C. L. (2016). Interrelationships among three avoidant coping styles and their relationship to trauma, peritraumatic distress, and posttraumatic stress disorder. The Journal of Nervous and Mental Disease, 204(2), 123–131. https://doi.org/10.1097/NMD.0000000000000434
- Government of British Columbia. (2025, May 29). Training to enhance service delivery to vulnerable communities. Province of British Columbia. Retrieved from https://www2.gov.bc.ca/gov/content/justice/criminal-justice/policing-in-bc/policing-standards/3-2/3-2-6-training-enhance-service-delivery`
- Moose Jaw Police. (2025). Moose Jaw and district victim’s services. Retrieved from https://mjpolice.ca/resources/victim-services/
- Woodstock Police. (2025). Sexual assault investigations policy. Retrieved from https://woodstockpoliceforce.ca/wp-content/uploads/2024/02/Sexual-Assault-Investigations-Policy-2024-004.pdf