Louis P. Hagopian, Ph.D.

Headshot of Louis P. Hagopian
  • Program Director, Neurobehavioral Programs, Kennedy Krieger Institute
  • Professor of Psychiatry and Behavioral Sciences


Anxiety Disorders, Autism, Behavioral Disorder, Developmental Disabilities ...read more

Research Interests

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


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 serve individuals with intellectual and developmental disabilities and autism spectrum disorders who suffer from severe behavioral dysfunction, including self-injury. These programs draw patients nationally and provide integrated behavior analytic and pharmacologic treatment. Through the delivery of clinical services, conduct of clinical research, provision of professional training, and consultation, the Neurobehavioral Programs have advanced knowledge and practice, and promoted access to behavior analytic services across the US and internationally.

Dr. Hagopian's research is focused on understanding and treating severe behavioral dysfunction in these populations. He has published his research articles in 34 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 since 2004. 

Dr. Hagopian is a Fellow of the Association for Behavior Analysis International. He received his Ph.D. from Virginia Tech and completed his Doctoral Internship at the Kennedy Krieger Institute and Johns Hopkins School of Medicine.

...read more


  • Program Director, Neurobehavioral Programs, 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

Hagopian LP. The consecutive controlled case series: Design, data-analytics, and reporting methods supporting the study of generality. J Appl Behav Anal. 2020; 53(2):596-619.

Hagopian LP, Rooker GW, Yenokyan G. Identifying predictive behavioral markers: A demonstration using automatically reinforced self-injurious behavior. J Appl Behav Anal. 2018; 51(3), 443-465.

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

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

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

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

Email me

Academic Affiliations & Courses

Graduate Program Affiliation

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

Patient Ratings & Comments

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