Julie Koudys

Associate Professor
Clinical Coordinator

Dr. Julie Koudys

Ph.D., C. Psych., BCBA-D


Dr. Koudys is NOT accepting MA students for Fall 2023.

Julie Koudys Ph.D., C.Psych., BCBA-D is an Associate Professor and Clinical Coordinator in the Department of Applied Disability Studies at Brock University, Ontario, Canada. She completed her Ph.D. in Clinical Psychology at York University, Toronto, Ontario. She is a Registered Psychologist and a Board Certified Behaviour Analyst at the doctoral level. She has worked with children and youth with ASD, developmental disabilities, learning disorders, and mental health challenges for approximately 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. Dr. Koudys serves as the International Representative and Secretary on the Board of Directors for the Behavior Analyst Certification Board (BACB). Dr. Koudys was 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). She is an active contributor to various volunteer committees for which she received the 2018 President’s Service Excellence Award from ONTABA.

  • Exploring strategies to improve the use of augmentative and alternative communication systems through parent training and effective instructional strategies
  • Evaluating parent-implemented behavioural interventions to treat sleep challenges and problem behaviour in children with ASD
  • Exploring long-term outcomes of youth with ASD who previously received intensive behavioural intervention 
  • Diverse applications of ABA, including the application of ABA to improve health related behaviours

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 

Current Graduate Students:
  • Quinlan Stamp
  • Hannah Floyd
  • Elizabeth Gay
Past Graduate Students:
  • Aman-preet Randhawa
  • Claire Shingleton-Smith
  • Paige O’Neill
  • Alyssa Treszl
  • Raluca Nuta
  • Krysten Spottiswood (Thompson)