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Stephen P. Lewis, PhD

Dr. Lewis is an Associate Professor in the Department of Psychology at the University of Guelph. His research has been featured in various media outlets, including The New York Times, Time, USA Today, and ABC. Dr. Lewis is co-author of the book Non-Suicidal Self-injury, which is part of the Advances in Psychotherapy series by the Society of Clinical Psychology (APA Division 12). He is an invited member and current President of the International Society for the Study of Self-Injury (ISSS). At present he is also Chair of the Research Ethics Board at the University of Guelph.

He is Co-Founder and Co-Director of Self-injury Outreach and Support (SiOS), an international outreach initiative providing current information and resources to individuals who self-injure, those who have recovered, as well as their families, friends, teachers and the health professionals who work with them. 

To view Dr. Lewis' recent publications, please click here. To view his current research interests, click here.

To contact Dr. Lewis, please email: 


PHD Students

Jenny Gomez, MA

Ivana Marcincinova, MA

Natalie Michal, MA

Therese Kenny, MSc

Veesta Mavandadi, MA

Tyler Pritchard, MA

MA Students

Joanna Collaton, MA

Brianne Gayfer, BAH

Honours Students

Sierra Goldfinger

Other Graduate Team Members

Lindsay Bryant, MA

Lara Genik, MA

Post-Honours Researchers

Brianne Gayfer, BAH

Emma Harman, BAH

Aaron Vieira, BAH

Kristen Whitfield, BAH

Lab Alumni

Alexis Arbuthnott, PhD

Completed MA and PhD in our lab

Thomas Baker

Completed an honours degree in our lab

Michele Davis, PhD, C. Psych

Completed PhD in our lab

Paul Grunberg

Completed BAH in our lab -- currently in the Clinical Psychology Program at McGill

Jasmine Mahdy, PhD

Completed MA and PhD in our lab

Shana Rosenrot, PhD

Completed MA and PhD in our lab

Jill St. Denis, PhD

Completed MA and PhD in our lab

Brittany Shaefer, BAH

Completed research internship in our lab