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Related Experiment Videos

Deficient inhibitory control in attention deficit hyperactivity disorder

R Schachar1, R Tannock, M Marriott

  • 1Department of Psychiatry, Hospital for Sick Children, Toronto, Canada.

Journal of Abnormal Child Psychology
|August 1, 1995
PubMed
Summary

Children with attention deficit hyperactivity disorder (ADHD) show impaired response inhibition and re-engagement. These executive control deficits are most pronounced in pervasive ADHD cases, impacting both home and school environments.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Child Psychiatry

Background:

  • Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder impacting executive functions.
  • Executive functions, including response inhibition and re-engagement, are crucial for adaptive behavior.
  • Previous research has identified inhibitory control deficits in ADHD, but the role of response re-engagement requires further investigation.

Purpose of the Study:

  • To investigate deficits in response inhibition and response re-engagement in children with ADHD.
  • To examine how the context of ADHD symptom presentation (home, school, or pervasive) influences these executive control processes.

Main Methods:

  • The study utilized the "change paradigm" to assess response inhibition and re-engagement.

Related Experiment Videos

  • Participants included 33 children diagnosed with ADHD and 22 typically developing children, aged 7–11 years.
  • ADHD subgroups were categorized based on symptom location: home-only, school-only, and pervasive.

    • Main Results:

    • Children with ADHD demonstrated significant deficits in both inhibitory control and response re-engagement compared to controls.
    • Executive control deficits were most severe in children with pervasive ADHD.
    • Children with ADHD symptoms predominantly in the school context showed moderate deficits, while those with home-limited ADHD exhibited the mildest deficits.

    Conclusions:

    • The findings confirm that children with ADHD exhibit impairments in inhibitory control and extend this to include deficits in response re-engagement.
    • These executive control deficits are context-dependent, with pervasive ADHD presenting the most significant challenges.
    • The study highlights the multifaceted nature of executive dysfunction in ADHD, involving multiple control processes.