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Related Experiment Videos

Visual spatial attention in children with attention deficit hyperactivity disorder.

Chung-Yao Chen1, Chia-Ling Chen, Ching-Yi Wu

  • 1Department of Rehabilitation Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan, ROC.

Chang Gung Medical Journal
|October 24, 2002
PubMed
Summary

Children with Attention Deficit Hyperactivity Disorder (ADHD) exhibit slower reaction times and impaired visual-spatial attention. This study reveals general attention deficits and specific left parietal dysfunction in ADHD, impacting covert shifts and sustained attention.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Cognitive Science

Background:

  • Attention Deficit Hyperactivity Disorder (ADHD) is characterized by attention deficits, but visual-spatial attention impairments in children with ADHD remain debated.
  • This study investigates visual-spatial attention, including covert shifts and sustained attention, linked to distinct brain regions.

Purpose of the Study:

  • To assess visual-spatial attention deficits in children with ADHD.
  • To explore the neuroanatomical basis of attention deficits in ADHD by examining posterior and anterior attentional systems.

Main Methods:

  • Utilized the Neuroscan system to measure reaction times (RT) in children with and without ADHD.
  • Employed within-subject conditions: cueing (valid, invalid, neutral), delay (800ms, 100ms), and visual field (RVF, LVF).

Related Experiment Videos

Main Results:

  • Children with ADHD showed significantly slower overall RTs (760ms) compared to controls (650ms).
  • A 100ms delay condition resulted in slower RTs than an 800ms delay across all children.
  • The ADHD group exhibited lateralized RT differences in the 100ms delay, specifically slower RTs in the right visual field for invalid cues, suggesting asymmetric parietal dysfunction.

Conclusions:

  • ADHD is associated with general attentional dysfunction, affecting both posterior-based covert attention shifts and anterior-based sustained attention.
  • Evidence suggests asymmetric left parietal dysfunction in the disengagement of attention in children with ADHD.