Nassim Tabri

Research Interests:

I am the Director of the Mental Health and Addictions Laboratory in which we examine why people engage in behaviours that harm their health and how group contexts shape psychological well-being and intergroup behaviour.

One line of research focuses on transdiagnostic factors—psychological processes like overvalued ideation, perfectionism, and impulsivity—that cut across traditional diagnostic boundaries. Using experimental studies, longitudinal designs, and daily experience-sampling methods, my research uncovers how these processes work together to sustain behaviours such as disordered eating and gambling. This work contributes to a developing transdiagnostic model of mental health and aims to inform more effective prevention strategies and interventions.

A second line of research examines the mental-health implications of group membership. Drawing on social identity theory and clinical/health psychology, we investigate how group-related experiences—such as feeling threatened, marginalized, or emotionally connected to one’s group—shape well-being and intergroup behaviour. We are currently developing and researching the construct of collective anti-mattering, which captures the belief that one’s group does not matter to outgroups or society. Our work examines how this perception influences emotions, political attitudes, coping responses, and mental-health outcomes.

Sample of recent publications:

Coelho, S. G., Tabri, N., Kerman, N., Lefebvre, T., Longpre, S., Williams, R. J., & Kim, H. S. (2024). The perceived causes of problematic substance use, gambling, and other addictive behaviours from the perspective of people with lived experience. International Journal of Mental Health and Addiction, 22, 722-745. https://doi.org/10.1007/s11469-022-00900-3

Mistry, N., Elliott, C. M., & Tabri, N. (2025). Development and preliminary validation of a self-report measure of sensory and moral disgust toward perceived unhealthy food. International Journal of Eating Disorders, 58(1), 1592-1605. https://doi.org/10.1002/eat.24450

Peetz, J., Wohl, M. J. A., & Tabri, N. (2025). When love and money collide: The role of financially focused self-concept in relationships. Personal Relationships, 32(4), e70032. https://doi.org/10.1111/pere.70032

Tabri, N., Hollingshead, S., & Wohl, M. J. A. (2023). Framing COVID-19 as an existential threat predicts prejudice towards Chinese people via anxious arousal. Social and Personality Psychology Compass, 17(9), e12804. https://doi.org/10.1111/spc3.12804

Tabri, N., Mosco, R., Enouy, S., & Quach, J. (in press). Morning momentary appearance dissatisfaction predicts daily increases in momentary appearance focused self-concept among female university students: An experience sampling study. International Journal of Eating Disorders. https://doi.org/10.1002/eat.24553

Tabri, N., Stark, S., Balodis, I. M., Price, A., & Wohl, M. J. A. (2024). Financially focused self-concept and disordered gambling are bidirectionally related over time. Addiction Research & Theory, 32(4), 299-311. https://doi.org/10.1080/16066359.2023.2269077

Tabri, N., Wood, R. T. A., & Wohl, M. J. A. (2025). Effects of personalized and normative feedback via the Positive Play Quiz on responsible gambling intention, self-efficacy, and behavior: A randomized controlled trial. Addiction, 120(5), 1016-1027. https://doi.org/10.1111/add.16722