Raymond Baillargeon
Raymond Baillargeon
Associate Professor

1993, Ph.D., Psychology, York University
1988, M.Ps., Psychology, Laval University
1985, B.A., Psychology, Laval University

THN 202A
613-562-5800 ext. 8268 (office)
613-562-5632 (fax)


Professor Baillargeon’s research focuses on the development of disruptive behaviour—physical aggression, oppositional-defiant and hyperactive-impulsive behaviour—in children, from birth to adolescence.

His work has shown these behaviours start occurring at early age and that certain behaviours are more common in boys than in girls, particularly physical aggression. The majority of children who show these types of behaviours before the age of two continue to display them following year, a strong indicator of early onset of disruptive behaviours. By following children over a long period, he has been able to show that the problems showing up in a child before the age of two are still present at four years of age and continue as the child reaches school age.

Once his research is completed, Professor Baillargeon should be able to identify the factors involved in the development of disruptive behaviours and formulate strategies for screening and prevention in pre-school age children.

Research interests

  • Early disruptive behavior problems and gender differences therein
  • Statistics and the development of health indicators
  • Prevention and screening for disruptive behavior problems
  • Disability and activity limitations in children


  • Baillargeon, R. H., Keenan, K., & Cao, G. (2012). The development of opposition-defiance during toddlerhood: A population-based cohort study. The Journal of Developmental & Behavioral Pediatrics, 33, 608-617. 
  • Baillargeon, R. H., Morisset, A., Keenan, K., Normand, C. L., Séguin, J. R., Japel, C., & Cao, G. (2012). Development of disruptive behaviors in young children: A prospective population-based cohort study. Infant Mental Health Journal, 33(6), 633-650.
  • Baillargeon, R. H., Bernier, J., & Normand, C. L. (2011). The Challenges Faced by Caregivers of Children with Impairments of Psychological Functions: A Population-based Cross-sectional Study.The Canadian Journal of Psychiatry/La Revue Canadienne de Psychiatrie, 56(10), 614-620.
  • Baillargeon, R. H., Thibodeau, E., Lefebvre, F., & Jeyaganth, S. (2011). Les complications obstétricales et les comportements d’agression physique avant l’âge de 2 ans. The Canadian Journal of Psychiatry/La Revue Canadienne de Psychiatrie, 56(7), 427-435.
  • Baillargeon, R. H., Morisset, A., Keenan, K., Normand, C. L., Jeyaganth, S., Boivin, M., & Tremblay, R. E. (2011). The Development of Prosocial Behaviors in Young Children: A Prospective Population-Based Cohort Study. The Journal of Genetic Psychology, 172(3), 221-251.
  • Baillargeon, R. H., Sward, G. D., Keenan, K., & Cao, G. (2011). Opposition-Defiance in the Second Year of Life: A Population-Based Cohort Study, Infancy, 16(4), 418-434.
  • Baillargeon, R. H., & Bernier, J. (2010). The burden of disability in children and youths associated with impairments of psychological functions. Psychiatry Research, 177, 199-205.