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Louis P. Hagopian, Ph.D.

Photo of Dr. Louis P. Hagopian, Ph.D.

Program Director, Neurobehavioral Unit, Kennedy Krieger Institute

Professor of Psychiatry and Behavioral Sciences

Expertise: Anxiety Disorders, Autism, Behavioral Disorder, Developmental Disabilities

Research Interests: Autism; Behavioral Principles; Anxiety disorders

Contact for Research Inquiries

Kennedy Krieger Institute
707 N. Broadway St.
Room 521
Baltimore, MD 21231 map
Phone: 443-923-2841
Fax: 443-923-2845

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Dr. Hagopian received his Ph.D. in Clinical Psychology from Virginia Tech in 1991. He is a Board Certified Behavior Analyst, and Licensed Psychologist.  

He is Program Director of the Neurobehavioral Programs at the Kennedy Krieger Institute. This includes the Neurobehavioral Unit, which provides intensive inpatient treatment for individuals with intellectual disabilities, who exhibit self-injury, aggression, and other problem behavior. The NBU draws patients nationally and provides integrated behavioral and psychiatric treatment.

Dr. Hagopian’s clinical research focused on understanding and treating problems related to intellectual and developmental disabilities. The NIH has funded his translational research continuously since 2004 (and through to 2018). This research crosses disciplines and seeks to understand the interaction of biological and environmental factors in individuals with intellectual and developmental disabilities. This includes a research grant on behavioral deficits in autism, a neuroimaging study on the reward system in autism, evaluation of generalization of behavioral treatments, and most recently on delineating subtypes of automatic self-injury. Dr. Hagopian has published his research in 21 different peer-reviewed behavioral, medical, and psychiatric journals, including: the Journal of Applied Behavior Analysis, Journal of Child Neurology, Journal of Developmental and Physical Disabilities, American Journal on Mental Retardation, Behavior Therapy, Journal of Anxiety Disorders, Journal of Behavior Therapy and Experimental Psychiatry, Pediatrics, and Child and Adolescent Psychiatric Clinics of North America. more


  • Program Director, Neurobehavioral Unit, Kennedy Krieger Institute
  • Professor of Psychiatry and Behavioral Sciences

Centers & Institutes


Additional Training

Johns Hopkins/Kennedy Krieger, Baltimore, Maryland, 1991

Research & Publications

Selected Publications

Hagopian, L. P., Contrucci, S.A.C., Long, E. S., & Rush, K. S. (2005). Enhancing functional communication training with competing stimuli. Journal of Applied Behavior Analysis, 38, 177-194.

Hagopian, L. P., Paclawskyj, T. R., & Contrucci, S.A.C. (2005). The use of conditional probability analysis to identify a response chain leading to the occurrence of eye poking. Research in Developmental Disabilities, 26, 393-397.

Hagopian, L. P., Toole, L. M., Long, E. S., Bowman, L. G., & Lieving, G. A. (2004). A comparison of dense-to-lean and fixed-lean schedules of alternative reinforcement and extinction. Journal of AppliedBehavior Analysis, 37, 323-338

Hagopian, L. P., Rush, K. S., Richman, D. M., Kurtz, P. F., Contrucci, S. A., & Crosland, K. (2002). The development and application of individualized levels systems for the treatment of severe problem behavior. Behavior Therapy, 33, 65-86.

Hagopian, L. P., Rush, K. S., Lewin, A. B., & Long, E. S. (2001). Evaluating the predictive validity of a single stimulus engagement preference assessment. Journal of Applied Behavior Analysis, 34, 475-486.

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