Tracy E Waasdorp
Assistant Professor of Psychiatry
Senior Research Scientist , Children's Hospital of Philadelphia
Director of Research for School-Based Bullying and Social Emotional Learning in the Center for Violence Prevention , Children's Hospital of Philadelphia
Department: Psychiatry
Contact information
The Roberts Center for Pediatric Research
2716 South Street
Philadelphia, PA 19146
2716 South Street
Philadelphia, PA 19146
Office: 2674251312
Education
BA (Psychology)
Muhlenberg College, 2002.
MS (Counseling and Psychological Services)
University of Pennsylvania, 2003.
PhD (Human Development and Family Studies)
University of Delaware, 2008.
BA (Psychology)
Muhlenberg College, 2002.
MS (Counseling and Psychological Services)
University of Pennsylvania, 2003.
PhD (Human Development and Family Studies)
University of Delaware, 2008.
Post-Graduate Training
Postdoctoral Fellow, Mental Health, Johns Hopkins University, 2008-2010.
Permanent linkPostdoctoral Fellow, Mental Health, Johns Hopkins University, 2008-2010.
Selected Publications
Sims, J. G., Cooley, J. L., Streicher, B. E., Lester, M. J. & Waasdorp, T. E. : What characteristics of bullying and peer victimization matter for children’s adjustment? In J. L. Cooley (Chair), Practical guidance on the assessment of bullying and peer victimization. National Association of School Psychologists Annual Convention, Charlotte, NC, United States. February 2027.Cooley, J. L., Pastrana, F. A., Mitchell, T. B., Streicher, B. E., Sims, J. G. & Waasdorp, T. E. : Identifying meaningful thresholds of bullying and peer victimization. In J. L. Cooley (Chair), Practical guidance on the assessment of bullying and peer victimization. National Association of School Psychologists Annual Convention, Charlotte, NC, United States. February 2027.
Waasdorp, T.E.: Beyond Parental Controls: What Research Tells Us About Parenting in a Digital World. CVP Research in Action Blog September 2026 Notes: https://injury.research.chop.edu/blog/posts/beyond-parental-controls-what-research-tells-us-about-parenting-digital-world.
Paskewich, B.S., and cited Waasdorp, T.E.: From Research to Real-World Practice: The Evolution of the Friend to Friend Program. Research in Action June 2026 Notes: https://injury.research.chop.edu/blog/posts/research-real-world-practice-evolution-friend-friend-program.
Lee, Y., Doty, J. Ma, X., & Waasdorp, T. E. : Profiles of Digital Parenting Styles: Associations With Cyberbullying Among Adolescents. Journal of Adolescence 98(5): 1806 - 1819, 2026 Notes: DOI: 10.1002/jad.70182.
Bren, Z., Tran, K. T., Visoki, E., Waasdorp, T. E., Moore, T. M., Pimentel, S. D., & Barzilay, R.: Smartphone Acquisition and Use at Age 13 and Their Associations with Health Outcomes at Age 14 JAMA Pediatrics 180(8): 858–866, 2026 Notes: DOI: 10.1001/jamapediatrics.2026.2118.
Barlett, C. P., Gentile, D. A., Khoo, A., Kowalski, R., & Waasdorp, T. E. : The Predictors and Consequences of Cyberbullying Perpetration and Cyber‐Victimization: The Development of a New Cyberbullying Theory. Journal of Adolescence 1(98), 2026 Notes: DOI: 10.1002/jad.70041.
Waasdorp, T. E.: What to Do if Your Child Engages in Online Gaming Bullying. Psychology Today 2026 Notes: https://www.psychologytoday.com/us/blog/keeping-your-kids-safe/202602/what-to-do-if-your-child-engages-in-online-gaming-bullying.
Polanco, C., Carey, R., Barnes, T. Earnshaw, V., Bell, N., & Waasdorp, T.: Capturing Mattering in the Elementary School Classroom: A Rasch Modeling Study of the Mattering to Teachers Scale. Paper presentation at the 2026 AERA Annual Meeting. Los Angeles, CA. 2026.
Ma, X., Doty, J. L., Barlett, C. P., & Waasdorp, T. E. : Restrictive Media Parenting Associated With Reduced Cyberbullying in Early Adolescents: A Longitudinal Study. The Journal of Early Adolescence 46(4), 2026 Notes: DOI: 10.1177/02724316251343106