Stephanie Marion

Assistant Professor


   416-736-2100 x88355

Stephanie joined the Department of Psychology at York University's Glendon College as Assistant Professor in 2019. Her academic research interests include social, social-cognitive, and forensic psychology, with a more recent interest in the psychology of teaching and learning.

She has earned her Bachelor of Science in Forensic Psychology from the University of Toronto and her Master's and Doctoral degrees in Psychology from Ryerson University. Her doctoral research addressed the reliability of alibi witnesses by examining social and interpersonal factors that increase the likelihood that an alibi witness will lie to protect a criminal suspect.  

She then completed a SSHRC postdoctoral fellowship jointly held at the University of Ontario Institute of Technology and the John Jay College of Criminal Justice. The subject of this research included the impact of confession evidence on lay witness testimony, the impact of eyewitness evidence on alibi witness statements, and best practices for suspect and witness interviewing.

Stephanie also worked as a behavioural scientist at at small research market firm in Toronto. Over the years, she has conducted behavioural research in both academic and industry settings, using the processes and methodologies best suited to these very different contexts.  

Social psychology; forensic psychology; statistics; research methods

PhD, Psychology (Ryerson University)

MA, Psychology (Ryerson University)

BSc, Forensic psychology (University of Toronto)

I am generally available to supervise student research projects (honours theses and independent projects).  Students who are interested and share some of my research interests should get in touch with me early to discuss the possibility of such a project.

Journal Articles

Kaplan, J., Cutler, B., Leach, A.-M., Marion, S., & Eastwood, J. (2019). Perceptions of coercion in interrogation: Comparing expert and lay decisions. Psychology, Crime, and Law.

Marion, S.B. & Burke, T.M. (2017). Altruistic lying in an alibi corroboration context: The effects of liking, compliance, and relationship between suspects and witnesses. Behavioral Sciences & the Law, 35, 37-59doi: 10.1002/bsl.2269

Marion, S. B. & Thorley, C. (2016). A meta-analytic review of collaborative inhibition and post-collaborative memory: Testing the predictions of the retrieval disruption hypothesis. Psychological Bulletin, 142, 1141-1164. doi:10.1037/bul0000071

Marion, S. B., Kukucka, J., Collins, C., Kassin, S., & Burke, T. M. (2016). Lost proof of innocence: The impact of confessions on alibi evidence. Law and Human Behavior, 40, 65-71. doi: 10.1037/lhb0000156

Marion, S. B. & Burke, T. M. (2013). False alibi corroboration: Witnesses lie for suspects who seem innocent, whether they like them or not. Law and Human Behavior, 37, 136-143. doi: 10.1037/lhb0000021

Book Chapters

Marion, S., Kaplan, J., & Cutler, B. (2019). Expert Testimony. In N. Brewer & A. Bradfield Douglass (Eds.) Psychological Science and the Law (pp. 318-337). New York: Guilford Press.

Moore, T. E., Marion, S., Fitzsimmons, C. L., & Cutler, B. (2016). Memory in the Criminal Courts. In C. Pakosh (Ed.) The Lawyer’s Guide to the Forensic Sciences (pp. 773-792). Toronto: Irwin Law.

Day, D. & Marion, S. B. (2016). Applying Social Psychology to the Criminal Justice System. In J. A. Gruman (Ed.), Applied Social Psychology: Understanding and Addressing Social and Practical Problems (3rd ed.). London: Sage Publications.

Burke, M. T. & Marion, S. B. (2012). Alibi Witnesses. In B. L. Cutler (Ed). Conviction of the Innocent: Lessons of Psychological Research (pp. 239-256).  Washington , DC: APA Press.

Day, D. & Marion, S. B. (2012). Applying Social Psychology to the Criminal Justice System. In F. W. Schneider, J. A. Gruman, & L. M. Coutts (Eds.), Applied Social Psychology: Understanding and Addressing Social and Practical Problems (2nd ed.) (pp. 245-272). London: Sage Publications.

Cours donnée en hiver 2023:

Courses regularly taught at Glendon:

  • GL/PSYC 2510 EN: Introduction to Psychology
  • GL/PSYC 2510 FR: Introduction à la psychologie
  • GL/PSYC 2520 EN: Introduction to Experimental Psychology
  • GL/PSYC 2520 FR: Introduction à la psychologie expérimentale
  • GL/PSYC 3660: Introduction to Social Psychology
  • GL/PSYC 3600: Psychology and the Law
  • GL/PSYC 4230: Advanced Seminar in Psychology