Julie Koudys

Associate Professor
Clinical Coordinator

Dr. Koudys is interested in supervising an MA student in Fall 2026, pending departmental supervision allocations.

Associate Professor Julie Koudys

Ph.D., C. Psych., R.B.A. (Ont.), BCBA-D

[email protected]

Dr. Koudys IS accepting MA students for Fall 2026.

Julie Koudys PhD, CPsych, RBA(Ont), BCBA-D is an Associate Professor and Clinical Coordinator in the Department of Applied Disability Studies at Brock University, Ontario, Canada. She is a Registered Psychologist and Behaviour Analyst who has worked with children and youth with neurodevelopmental disorders, learning disorders, and mental health challenges for over 20 years. She is passionate about the integration of research into practice and partners with community providers to support clinical research and evidence-based practice. Along with her graduate students, she has published numerous research articles and book chapters and has presented more than 100 papers and workshops, including invited addresses, at both national and international conferences.  Dr. Koudys has a long history of service, including serving as an appointed member of the Government of Ontario’s Clinical Expert Committee for ASD and the Autism Advisory Panel for the Ontario Autism Program. She was Chair of the Ontario Scientific Expert Taskforce for the Treatment of ASD, for which she received the 2017 Research Award from the Ontario Association for Behaviour Analysis (ONTABA). In recognition of her service, she also received the 2018 President’s Service Excellence Award from ONTABA. She currently serves as the International Representative on the Board of Directors for the Behavior Analyst Certification Board (BACB).

Research Interests

Publications & Collections

Koudys, J., Elliott, M., Floyd, H., McNeely, T., Rinaldo, E., & Perry, A. (2025). Telehealth Picture Exchange Communication System caregiver training: A multi-site community evaluation. Journal of Autism and Developmental Disorders. https://doi.org/10.1007/s10803-025-06885-x

Koudys, J., Esteves, J., Elliott, M., Spottiswood, K., Treszl, A., Randhawa, A., & Perry, A. (2025). Feasibility and pilot evaluation of a telehealth Picture Exchange Communication System caregiver training. Journal of Developmental and Physical Disabilities. https://doi.org/10.1007/s10882-025-10010-2

Koudys, J., McConnell, C., Savard, A., Spottiswood, K., Treszl., A., O’Neill, P., Harrison, K., Guzman Ratko, M., & Randhawa, A. (2024). The use of technology and telehealth to improve behavioral sleep assessment and intervention. Behavior Analysis in Practice, 18, 74–95. https://doi.org/10.1007/s40617-024-00942-0
Shingleton-Smith, C., Koudys, J., Azzano, A., & Feldman, M. (2024). Telehealth general case parent training for children at risk for autism. Journal of Applied Behavior Analysis, 57(4), 879–892. https://doi.org/10.1002/jaba.2913
O’Neill, P., & Koudys, J. (2024). Scoping review: Caregiver training to reduce challenging behaviors displayed by children on the autism spectrum. Behavior Analysis in Practice, 18(1), 56–73. https://doi.org/10.1007/s40617-024-00960-y
Koudys, J., Perry, A., Magnacca, C., & McFee, K. (2023). Predictors of Picture Exchange Communication System (PECS) outcomes. Autism & Developmental Language Impairments, 8, 23969415231221516. https://doi.org/10.1177/23969415231221516
Thomson, K., Condillac, R., Trudeau-Craig, K., Busch, L., Koudys, J., Boutsis, E., & Broto, J. (2023).The long and winding road to professional regulation in Ontario Canada. Behavior Analysis in Practice. https://doi.org/10.1007/s40617-023-00880-3
O’Neill, P., Magnacca, C., Gunnarsson, K.F., Khokhar, N., Koudys, J., & Malkin, A. (2023). Cultural responsiveness in behavior analysis: Provider and recipient perceptions in Ontario. Behavior Analysis in Practice.  https://doi.org/10.1007/s40617-023-00825-w
Koudys, J., Perry, A. & McFee, K. (2021) Picture Exchange Communication System (PECS) Use in a Community Setting: A Preliminary Investigation. Journal of Developmental and Physical  Disabilities. https://doi.org/10.1007/s10882-021-09826-5
Ho, H., Perry, A., & Koudys, J. (2021). A systematic review of behaviour analytic interventions for young children with intellectual disabilities. Journal of Intellectual Disability Research, 65(1), 11-31.doi.org/10.1111/jir.12780
Koudys, J., Perry, A., Ho, H., & Charles, M. (2021) Mental health status of youth diagnosed with ASD who received early intensive behavioral intervention as young children. Child and Family Behavior Therapy, 43(2), 103-113. doi.org/10.1080/07317107.2021.1895415
Nuta, R., Koudys, J., & O’Neill, P. (2021). Parent treatment integrity across multiple components of a behavioural intervention. Behavioral Interventions, 36(4), 796-816. doi.org/10.1002/bin.1817
Treszl, A., Koudys, J., & O’Neill, P. (2021). Evaluating the effects of Picture Exchange Communication System ® (PECS ®) mediator training via telehealth using behavioral skills training and general case training. Behavioral Interventions. Advance online publication.  https://doi.org/10.1002/bin.1835
Perry, A., Koudys, J., Prichard, A., & Ho, H. (2017). Follow-up study of youth who received EIBI as young children. Behaviour Modification,43(2), 1-21. 10.1177/0145445517746916.
Book Chapters

Perry, A., & Koudys, J. (2020). Autism Spectrum Disorder. In I. Brown, M. Percy, H. Aldersey, R. Condillac, A. Fung, & B. Isaacs. (Eds.), Developmental disabilities in Ontario (4th ed., pp. 263-286). Delphi Graphic Communications.

Koudys, J.,& Spottiswood, K.(2020). Augmentative and alternative communication. In I. Brown, M. Percy, H. Aldersey, R. Condillac, A. Fung, & B. Isaacs. (Eds.), Developmental disabilities in Ontario (4th ed., pp. 459-480). Delphi Graphic Communications.

Perry, A., Koudys, J.,Dunlap, G., & Black, A. (2017).  Autism Spectrum Disorder.  In M. Wehmeyer, I. Brown, M. Percy, K. Shogren, & A. Fung. (Eds.), A Comprehensive guide to intellectual and developmental disabilities (pp. 219-230).  Brookes, United States.

Perry, A., Koudys, J., & Blacklock, K. (2016). Early intensive behavioural intervention and training. In N.N. Singh (Ed.), Clinical handbook of evidence-based practices for individuals with intellectual disabilities (pp. 511-536). Springer. DOI: 10.1007/978-3-319-26583-4

Graduate Students

Current Graduate Students:
  • Aman-preet Randhawa
  • Aparajita Trisha Roy
  • Aliana Weavers

Past Graduate Students:

  • Hannah Floyd
  • Elizabeth Gay
  • Taylor McNeely
  • Quinlan Stamp
  • Aman-preet Randhawa
  • Claire Shingleton-Smith
  • Paige O’Neill
  • Alyssa Sansom (Treszl)
  • Raluca George (Nuta)
  • Krysten Spottiswood (Thompson)