Photo of Joel T. Nigg, Ph.D.

Joel T. Nigg Ph.D.

  • (503) 494-6176
    • Professor of Psychiatry, Division of Clinical Psychology School of Medicine
    • Director, Division of Psychology
    • Director, Center for ADHD Research Psychiatry School of Medicine
    • Behavioral Neuroscience Graduate Program School of Medicine

Dr. Nigg specializes in diagnostic assessment and treatment planning for children with attention and learning disorders. He is a leading expert on ADHD/ADD, and his extensive and ongoing original scientific research in this area helps inform his consultations to families and other clinicians.

Dr. Nigg directs the Center for ADHD Research at OHSU. The center’s goal is to understand different causes and influences for ADHD, find ways to detect it better and earlier, and then develop more effective treatments.

Dr. Nigg is the author of two books on ADHD. His most recent book was written specifically for parents and families struggling with ADHD. It is called “Getting Ahead of ADHD”

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Areas of interest

  • Developmental Psychopathology
  • Temperament
  • Executive Functions
  • ADHD


  • M.S.W., The University of Michigan, Ann Arbor Michigan 1985
  • A.B., Harvard University, Cambridge Massachusetts 1996
  • Ph.D., University of California, Berkeley California 1996


  • "Recent developments in neuropsychological models of childhood psychiatric disorders"   2008
  • "Reliability and validity of proposed DSM-5 ADHD symptoms in a clinical sample of adults" Journal of Neuropsychiatry and Clinical Neurosciences August 26 2015
  • "The role of inhibition in the production of disfluencies" Memory and Cognition July 2010
  • "Poor response inhibition as a predictor of problem drinking and illicit drug use in adolescents at risk for alcoholism and other substance use disorders" Journal of the American Academy of Child and Adolescent Psychiatry April 2006
  • "Neuropsychological functioning, motor speed, and language processing in boys with and without ADHD" Journal of Abnormal Child Psychology  1996
  • "Factor Structure of the Children's Perception of Interparental Conflict Scale for Studies of Youths With Externalizing Behavior Problems" Psychological Assessment September 2009
  • "Cognitive impairments found with attention-deficit/hyperactivity disorder" Psychiatric Times June 2011
  • "Language Production Strategies and Disfluencies in Multi-Clause Network Descriptions" Neuropsychology July 2011
  • "Whither causal models in the neuroscience of ADHD?" Developmental Science March 2005
  • "Attention-deficit/hyperactivity disorder" Current Directions in Psychological Science  2010
  • "Omega-3 fatty acid and ADHD" Clinical Psychology Review  2014
  • "Is reaction time variability in ADHD mainly at low frequencies?" Journal of Child Psychology and Psychiatry and Allied Disciplines May 2013
  • "Is the fluency of language outputs related to individual differences in intelligence and executive function?" Acta Psychologica October 2013
  • "An integrative theory of attention-deficit/hyperactivity disorder based on the cognitive and affective neurosciences" Development and Psychopathology July 2005
  • "Malevolence, splitting, and parental ratings by borderlines" Journal of Nervous and Mental Disease  1992
  • "A two-year longitudinal study of neuropsychological and cognitive performance in relation to behavioral problems and competencies in elementary school children" Journal of Abnormal Child Psychology  1999
  • "The autism brain imaging data exchange" Molecular Psychiatry  2014
  • "A Person-Centered Personality Approach to Heterogeneity in Attention-Deficit/Hyperactivity Disorder (ADHD)" Journal of Abnormal Psychology February 2010
  • "Editorial" Journal of Child Psychology and Psychiatry and Allied Disciplines April 1 2015
  • "Smoking is associated with neurocognitive deficits in alcoholism" Drug and Alcohol Dependence April 28 2006
  • "Increased sensitivity to perceptual interference in adults with attention deficit hyperactivity disorder" Journal of the International Neuropsychological Society May 2012
  • "Trajectories of childhood aggression and inattention/hyperactivity" Journal of the American Academy of Child and Adolescent Psychiatry October 2008
  • "Erratum to" Journal of Abnormal Child Psychology November 1 2015
  • "Attention, task difficulty, and ADHD" British Journal of Developmental Psychology November 2005
  • "Attention deficit hyperactivity disorder in African American children" Clinical Psychology Review February 2009
  • "The structure of childhood disruptive behaviors" Psychological Assessment December 2010
  • "Inferring functional connectivity in MRI using Bayesian network structure learning with a modified PC algorithm" NeuroImage July 15 2013
  • "The effects of puberty on genetic risk for disordered eating" Psychological Medicine March 2012
  • "Integration of symptom ratings from multiple informants in ADHD diagnosis" Psychological Assessment September 1 2015
  • "Single dissociation findings of ADHD deficits in vigilance but not anterior or posterior attention systems" Neuropsychology July 2006

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