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Gregory S. Chasson

Gregory S. Chasson, Ph.D.

Associate Professor of Psychology
Director, Clinical Training Program







Tech Central 217

Office Hours: 

Monday 11:50-1:50 p.m. and by appointment


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


Post-Doctoral Fellowship: Massachusetts General Hospital/Harvard Medical School
Pre-Doctoral Fellowship: McLean Hospital/Harvard Medical School


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).

Selected Publications 

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.

Sawyer, B. A., Williams, M. T., Chasson, G. S., & Chapman, L. K. (2015).  The Impact of childhood family functioning on anxious, depressive, and obsessive-compulsive symptoms in adulthood among African Americans. Journal of Obsessive-Compulsive and Related Disorders, 4, 8-13.

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.

He, L. Ewing, J., Shaw, A. M., Wang, J., & Chasson, G. S. (2014). A cross-sectional investigation of autogenous and reactive obsessions and associated cognitive and symptom correlates in China.  International Journal of Clinical and Health Psychology, 14, 93−101.

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.

Wetterneck, C. T., Little, T. E., Chasson, G. S.,  Smith, A. H., Hart, J. M., Stanley, M. A., &  Björgvinsson, T. (2011). Obsessive-compulsive personality traits: How are they related to OCD severity? Journal of Anxiety Disorders, 25, 1024-1031.

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.