Skip Navigation
  Search Menu
Find an Expert


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: Behavior disorders in intellectual and developmental disabilities; self-injurious behavior; applied behavior analysis


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

View all on Pubmed

Shirley MD, Frelin L, López JS, Jedlicka A, Dziedzic A, Frank-Crawford MA, Silverman, W, Hagopian LP, Pevsner, J. Copy number variants associated with 14 cases of self-injurious behavior. PLOS ONE. 2016.11(3): e0149646. doi:10.1371/journal.pone.0149646

McGuire K, Fung LK, Hagopian LP, Vasa RA, Mahajan R, Bernal P, Silberman AE, Wolfe A, Coury DL, Veenstra-VanderWeele J, Hardan AY, Whitaker AH. Irritability and problem behavior in autism spectrum disorder: A practice pathway for pediatric primary care. Pediat. 2016. 137(S2): 2 20152851L

Hagopian LP, Rooker GW, Zarcone JR. Delineating subtypes of self-injurious behavior maintained by automatic reinforcement. J Appl Behav Anal. 2015;48(3),523-543

Hagopian LP, Rooker GW, Jessel J, DeLeon IG. Initial functional analyses outcomes and modifications in pursuit of differentiation: A summary of 176 inpatient cases. J Appl Behav Anal. 2013;46(1);88-100.

Rooker GW, Jessel J, Kurtz PF, Hagopian LP. Functional communication training with and without alternative reinforcement and punishment: An analysis of 58 applications. J Appl Behav Anal. 2013;46(4):708-722.

Contact for Research Inquiries

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

Academic Affiliations & Courses

Graduate Program Affiliation

University of Maryland, Baltimore County.  Department of Psychology, Masters in Applied Behavior Analysis.

Is this you? Edit Profile