Gregory S. Chasson

  • Associate Professor of Psychology
  • Director, Clinical Training Program

Gregory S. Chasson is a licensed clinical psychologist and associate professor in the Department of Psychology at Illinois Institute of Technology. He received his Ph.D. in Clinical Psychology from the University of Houston and completed three years of pre- and post-doctoral training at Harvard Medical School (at McLean Hospital and Massachusetts General Hospital, respectively). From 2010 to 2016, Chasson was an assistant professor in the Department of Psychology at Towson University, where he directed the Site for OCD & Autism Research. He joined the Department of Psychology at Illinois Institute of Technology in fall 2016 as an associate professor and currently directs his clinical psychology research group called the Repetitive Experiences and Behavior Lab (REBL).



Ph.D., University of Houston, Clinical Psychology
M.A., University of Houston, Psychology
B.A., University of California-Santa Barbara, Psychology

Research Interests

Obsessive-compulsive spectrum disorders, particularly obsessive-compulsive disorder (OCD) and hoarding disorder, across the lifespan;Autism spectrum disorders, specifically high-functioning adult manifestations;Anxiety disorders and trauma-related conditions


Chasson, G. S., Guy, A. A., Bates, S., & Corrigan, P. W. (2018). They aren’t like me, they are bad, and they are to blame: A theoretically-informed study of stigma of hoarding disorder and obsessive-compulsive disorder. Journal of Obsessive-Compulsive and Related Disorders, 16, 56-65.

Chasson, G. S., Bello, M. S., Luxon, A. M., Graham, T. A. A., & Leventhal, A. M. (2017). Transdiagnostic emotional vulnerabilities linking obsessive-compulsive and depressive symptoms in a community-based sample of adolescents. Depression & Anxiety, 34, 761-769.

Chasson. G. S., Williams, M. T., Davis, D., & Combs, J. (2017). The utility of the Structured Clinical Interview for the DSM-IV Axis I Disorders (SCID-I) for the assessment of obsessive-compulsive disorder in African Americans. BMC Psychiatry [Open Access].

Tellawi, G., Williams, M. T., & Chasson, G. S. (2016). Interpersonal hostility and suspicious thinking in obsessive-compulsive disorder. Psychiatry Research, 243, 295-302.

Eskow, K., Chasson, G. S., & Summers, J. A. (2015). Child and family progress from a Medicaid Home and Community-Based Services autism waiver program. Journal of Autism and Developmental Disorders, 45, 626-635.

Timpano, K.R., Cek, D., Fu, Z., Tang, T., Wang, J., & Chasson, G.S. (2015). A consideration of Hoarding Disorder symptoms in China. Comprehensive Psychiatry, 57, 36-45.

Chasson, G. S., Carpenter, A., Ewing, J., Gibby, B., & Lee, N. (2014). Empowering families to help a loved one with hoarding disorder: Pilot study of family-as-motivators training. Behaviour Research and Therapy, 63, 9-16.

Chasson, G. S., Tang, S., Gray, B., Sun, H., Wang, J. (2012). Further validation of a Chinese version of the obsessive-compulsive inventory-revised. Behavioural and Cognitive Psychotherapy, 7, 1-6.

Chasson, G. S., Timpano, K. T., Greenberg. J. L., Shaw, A., Singer, T., & Wilhelm, S. (2011). Shared social competence impairment: Another link between the obsessive-compulsive and autism spectrums? Clinical Psychology Review, 31, 653-662.

Chasson, G. S., Buhlmann, U., Tolin, D. F, Reese, H. E., Rowley, T., Welsh, K. S., & Wilhelm, S. (2010). The need for speed: Accelerating OCD recovery using D-cycloserine to enhance exposure and response prevention. Behaviour Research and Therapy, 48(7), 675-679.

Chasson, G. S., Harris, G. E., & Neely, W. J. (2007). Cost comparison of early intensive behavioral intervention and special education for children with autism. Journal of Child and Family Studies, 16(3), 401-413.