Farrell, A.H., Szatmari, P., & Vaillancourt, T. (2024). Epidemiology of mental health challenges in children and adolescents. The Pediatric Clinics of North America, 1-13. https://doi.org/10.1016/j.pcl.2024.07.009

Farrell, A. H., *Eriksson, M., & Vaillancourt, T. (2024). Brief report: Social comparison, hypercompetitiveness, and indirect aggression: Associations with loneliness and mental health. Aggressive Behavior, 50(5), e22171. https://doi.org/10.1002/ab.22171

Farrell, A. H., Brittain, H., Krygsman, A., & Vaillancourt, T. (2024). Bullying victimization and mental health before and during the COVID-19 pandemic. Frontiers in Child and Adolescent Psychiatry, 3, 1411265. http://doi.org/10.3389/frcha.2024.1411265

Patte, K. A., Gohari, M. R., Lucibello, K. M., Belanger, R. E., Farrell, A. H., & Leatherdale, S. T. (2024). A prospective and repeat cross-sectional study of bullying victimization among adolescents from before COVID-19 to the two years following the pandemic onset. Journal of School Violence. Online first. https://doi.org/10.1080/15388220.2024.2333504

Brazil, K. J., Farrell, A. H., *Boer, A., & Volk, A. A. (2024). Adolescent psychopathic traits and adverse environments: Associations with socially adaptive outcomes. Development and Psychopathology. Online first. https://doi.org/10.1017/S0954579424000051

Vaillancourt, T., Brittain, H., *Eriksson, M., Krygsman, A., Farrell, A. H., Davis, A. C., Volk, A. A., & Arnocky, S. (2024). Social Media Friendship Jealousy. Evolutionary Psychology, 22(1), https://doi.org/10.1177/14747049231225738

Farrell, A. H., Vitoroulis, I., *Eriksson, M., & Vaillancourt, T. (2023). Loneliness and well-being in children and adolescents during the COVID-19 pandemic: A systematic review. Children, 10, 279. https://doi.org/10.3390/children10020279

Farrell, A. H., & Vaillancourt, T. (2023). Indirect aggression, anxiety, and empathy: Disaggregating between and within person longitudinal associations during childhood and adolescence. Development and Psychopathology, 35(1), 228-240. https://doi.org/10.1017/S0954579421001450

Vaillancourt, T., Brittain, H., Farrell, A. H., Krygsman, A., & Vitoroulis, I. (2023). Bullying involvement and the transition to high school: A brief report. Aggressive Behavior, 1-9. https://doi.org/10.1002/ab.22082

Farrell, A. H. & Vaillancourt, T. (2023). Aggression across the Lifespan. In H. Montgomery (Ed.), Oxford Bibliographies in Childhood Studies. Oxford University Press.

Vaillancourt, T., Farrell, A. H., Brittain, H., Krygsman, A., Vitoroulis, I., & Pepler, D. (2023). Bullying before and during the COVID-19 pandemic. Current Opinion in Psychology, 53, 101689. https://doi.org/10.1016/j.copsyc.2023.101689 

Krygsman, A., Farrell, A. H., Brittain, H., & Vaillancourt, T. (2023). Anxiety symptoms before and during the COVID-19 pandemic: A longitudinal examination of Canadian young adults. Journal of Anxiety Disorders, 102769. https://doi.org/10.1016/j.janxdis.2023.102769 

Farrell, T. S. C., & Farrell, A. H. (2023). Reflective practice in language teacher education. In Z. Tajeddin & T. S. C. Farrell (Eds.), Handbook of Language Teacher Education: Critical Review and Research Synthesis, Springer.

Farrell, A. H., & Vaillancourt, T. (2022). Childhood predictors of adolescent joint trajectories: A multi-informant study on bullying perpetration and hypercompetitiveness. Journal of Clinical Child & Adolescent Psychology, 51(6). 1011-1023. Online first: https://doi.org/10.1080/15374416.2021.1923019

Farrell, A. H., & Vaillancourt, T. (2022). Bullying from a psychological perspective: A Response to Magrass and Derber. In C. Donoghue (Ed.), The Sociology of Bullying: Power, Status, and Aggression Among Adolescents. 297-303. New York University Press.

Davis, A. C., Farrell, A. H., Brittain, H., Krygsman, A., Arnocky, S., & Vaillancourt, T. (2022). The dark triad and bullying in adolescence: A three-wave random intercept cross-lagged panel analysis. Journal of Research in Personality, 96, 104178, 1-11. https://doi.org/10.1016/j.jrp.2021.104178

Vaillancourt, T., Brittain, H., Krygsman, A., Farrell, A. H., Pepler, D., Landon, S., Saint-Georges, Z., & Vitoroulis, I.  (2022). In-person versus on-line learning in relation to students’ perceptions of mattering during COVID-19: A brief report. Journal of Psychoeducational Assessment, 40(1), 159-169. https://doi.org/10.1177/07342829211053668

Krygsman, A., Farrell, A. H., Brittain, H., & Vaillancourt, T. (2022). Depression symptoms, mattering, and anti-mattering: Longitudinal associations in young adulthood. Journal of Psychoeducational Assessment, 40(1), 77-94. http://doi.org/10.1177/07342829211050519

Farrell, A. H., & Vaillancourt, T. (2021). Joint trajectories of adolescent narcissism and self-esteem predict interpersonal features in young adulthood. Journal of Research in Personality, 93, 104127, 1-12. https://doi.org/10.1016/j.jrp.2021.104127

Vaillancourt, T., Brittain, H., Krygsman, A., Davis, A., Farrell, A. H., Desmarais, R., Hammill, C., Karasz, S., Morgan, R., Ritchie, A., & Sanderson, C. (2021). Assessing the quality of research examining change in children’s mental health in the context of COVID-19. University of Ottawa Journal of Medicine, 11(1), 10-15. https://doi.org/10.18192/uojm.v11i1.5950 

Farrell, A. H., & Vaillancourt, T. (2021). Examining the joint development of antisocial behavior and personality: Predictors and trajectories of adolescent indirect aggression and Machiavellianism. Developmental Psychology, 57(5), 805-813. https://doi.org/10.1037/dev0001016

Vaillancourt T., Brittan, H., Krgysman, A., Farrell, A. H., Landon, S., & Pepler, D. J. (2021). School bullying before and during COVID-19: Results from a population-based randomized design. Aggressive Behavior, 47(5), 557-569. https://doi.org/10.1002/ab.2198

Farrell, A. H., & Vaillancourt, T. (2021). The impact of childhood bullying trajectories on young adulthood antisocial trajectories. Journal of Youth and Adolescence, 50, 1782-1796. http://doi.org/10.1007/s10964-021-01456-6

Vaillancourt, T. & Farrell, A. H. (2021). Mean kids become mean adults: Trajectories of indirect aggression from age 11 to 22. Aggressive Behavior, 47(4), 394–404. http://doi.org/10.1002/ab.21950

Farrell, A. H., & Vaillancourt, T. (2021). Adolescent empathic concern and perspective taking: Heterogenous developmental trajectories and childhood social and psychological factors. Journal of Personality, 89, 672-688. https://doi.org/10.1111/jopy.12607 

Volk, A. A., Provenzano, D. A., Farrell, A. H., Dane, A. V., Shulman, E. P. (2021). Personality and bullying: Pathways to adolescent social dominance. Current Psychology, 40(5), 2415-2426. http://doi.org/1007/s12144-019-00182-4

Farrell, A. H., Schiralli, K., & Volk, A. A. (2021). Factors that influence bullying. In T. K. Shackelford, & V. A. Weekes-Shackelford (Eds.). Encyclopedia of Evolutionary Psychological Science. (pp. 2909-2913). Springer. 

Farrell, A. H., & Volk, A. A. (2021). Same-sex school bullying. In T. K. Shackelford, & V. A. Weekes-Shackelford (Eds.), Encyclopedia of Evolutionary Psychological Science. (pp. 6813-6817). Springer.

Farrell, A. H., & Vaillancourt, T. (2020). Bullying perpetration and narcissistic personality traits across adolescence: Joint trajectories and childhood risk factors. Frontiers in Psychiatry: Child and Adolescent Psychiatry, 11, 1-13. http://doi.org/10.3389/fpsyt.2020.483229

Mularczyk, K. P., Farrell, A. H., Volk, A. A., & Book, A. S. (2020). The utility of broad versus specific measures of personality for assessing adolescent antisociality. North American Journal of Psychology, 22(4), 679-700. 

Farrell, A. H., Volk, A. A., & Vaillancourt, T. (2020). Empathy, exploitation, and adolescent bullying perpetration: A longitudinal social-ecological investigation. Journal of Psychopathology and Behavioral Assessment, 42(3), 436-449. http://doi.org/10.1007/s10862-019-09767-6

Farrell, A. H., & Dane, A. V. (2020). Bullying, victimization, and prosocial resource control strategies: Differential relations with dominance and alliance formation. Evolutionary Behavioral Sciences, 14(3), 270-283.  https://doi.org/10.1037/ebs0000178

Farrell, A. H., & Vaillancourt, T. (2019). Developmental pathways of perfectionism: Associations with bullying perpetration, peer victimization, and narcissism. Journal of Applied Developmental Psychology, 65, 1-10. https://doi.org/10.1016/j.appdev.2019.101065

Farrell, A. H., & Vaillancourt, T. (2019). Temperament, bullying, and dating aggression: Longitudinal associations for adolescents in a romantic relationship. Evolutionary Psychology, 17(2), 1-13. http://doi.org/10.1177/1474704919847450

Provenzano, D. A., Dane, A. V., Farrell, A. H., Marini, Z. A., & Volk, A. A. (2018). Do bullies have more sex? The role of personality. Evolutionary Psychological Science, 4(3), 221-232. http://doi.org/10.1007/s40806-017-0126-4

Spadafora, N., Farrell, A. H., Provenzano, D. A., Marini, Z. A., & Volk, A. A. (2018). Temperamental differences and classroom incivility: Exploring the role of individual differences. Canadian Journal of School Psychology, 33(1), 44-62. http://doi.org/10.1177/0829573516648946

Farrell, A. H., & Volk, A. A. (2017). Social ecology and adolescent bullying: Filtering risky environments through antisocial personality. Children and Youth Services Review, 83, 85-100. https://doi.org/10.1016/j.childyouth.2017.10.033

Farrell, A. H., Provenzano, D. A., Dane, A. V., Marini, Z. A., & Volk, A. A. (2017). Maternal knowledge, adolescent personality, and bullying. Personality and Individual Differences, 104, 413-416. http://doi.org/10.1016/j.paid.2016.09.001

Farrell, A. H.*, Semplonius, T.*, Shapira, M., Zhou, X., Laurence, S., Willoughby, T., Mahy, C. E.V., Mondloch, C. J., & Evans, A. D. (2016). Research activity in Canadian developmental psychology programs. Canadian Psychology/ Psychologie Canadienne, 57, 76-82. http://doi.org/10.1037/cap0000040 *order of authorship was alphabetical for the two first authors

Farrell, A. H., Provenzano, D. A., Spadafora, N., Marini, Z., A. & Volk, A. A. (2016). Measuring adolescent attitudes toward classroom incivility: Exploring differences between intentional and unintentional incivility. Journal of Psychoeducational Assessment, 34, 577-588. http://doi.org/10.1177/0734282915623446

Volk, A. A., Farrell, A. H., Franklin, P., Mularczyk, K. P., & Provenzano, D. A. (2016) Adolescent bullying in schools: An evolutionary perspective. In D.C. Geary & D. Berch (Eds.), Evolutionary Perspectives on Child Development and Education. (pp. 167-191). Springer. http://doi.org/10.1007/978-3-319-29986-6_7

Farrell, A. H., Brook, C., Dane, A. V., Marini, Z., & Volk, A. A. (2015). Relations between adolescent ratings of Rothbart’s temperament model and the HEXACO personality model. Journal of Personality Assessment, 97(2), 163-171. http://doi.org/10.1080/00223891.2014.940961

Volk, A. A., Della Cioppa, V., Earle, M., & Farrell, A. H. (2015). Social competition and bullying: An adaptive socioecological perspective. In V. Zeigler-Hill, L. Welling, & T. Shackelford (Eds.), Evolutionary Perspectives on Social Psychology. (pp. 387-399). Springer. http://doi.org/10.1007/978-3-319-12697-5_30

Farrell, A. H., Della Cioppa, V., Volk, A. A., & Book, A. S. (2014). Predicting bullying heterogeneity with the HEXACO model of personality. International Journal of Advances in Psychology, 3(2), 30-39. http://doi.org/0.14355/ijap.2014.0302.02