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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


Anxiety Disorders, Autism, Behavioral Disorder, Developmental Disabilities

Research Interests

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


Dr. Hagopian is the Program Director of the Neurobehavioral Programs at the Kennedy Krieger Institute, and Professor in the Division of Behavioral Biology of the Department of Psychiatry.

The Neurobehavioral Programs draw patients nationally and provide integrated behavior analytic and pharmacologic treatment for those with intellectual and developmental disabilities who suffer from severe behavioral dysfunction, including self-injury. Through clinical research, professional training, and consultation, the Neurobehavioral Programs have advanced knowledge and promoted behavior analytic services across the US and internationally.

Dr. Hagopian's research is focused on both treating and understanding the interaction of genetic, psychiatric, and environmental factors in the development and maintenance of these conditions. He has published his research articles in 30 different peer-reviewed behavioral and medical journals, and has been awarded several research grants from the National Institutes of Health, which has funded his research continuously since 2004. 

Dr. Hagopian is a Board Certified Behavior Analyst (BCBA-D). He received his Ph.D. from Virginia Tech, and completed his Doctoral Internship at the Kennedy Krieger Institute and Johns Hopkins School of Medicine. more


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

Departments / Divisions

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
Fax: 443-923-2845

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Academic Affiliations & Courses

Graduate Program Affiliation

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

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