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Speed of performance of children with developmental right hemisphere syndrome and with attention-deficit

Yael E Landau1, Judith G Auerbach, Varda Gross-Tsur

  • 1Neuropediatric Unit, Shaare Zedek Medical Center, Jerusalem, Israel. landauy@bgumail.bgu.ac.il

Journal of Child Neurology
|May 23, 2003
PubMed

Insights

Children with developmental right hemisphere syndrome exhibit significant slowness in performance speed compared to those with attention-deficit hyperactivity disorder (ADHD) and controls. This indicates slowness is a core feature of right hemisphere conditions, not solely ADHD symptoms.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Pediatrics

Background:

  • Slowness is frequently observed in children diagnosed with attention-deficit hyperactivity disorder (ADHD) and developmental right hemisphere syndrome.
  • Clinical observations suggested a more pronounced slowness in children with developmental right hemisphere syndrome compared to those with ADHD.

Purpose of the Study:

  • To quantitatively assess and compare the speed of performance in children with developmental right hemisphere syndrome, ADHD, and typically developing controls.
  • To determine if slowness in developmental right hemisphere syndrome is distinct from or attributable to co-occurring ADHD symptomatology.

Main Methods:

  • A cohort of 19 children in each group (developmental right hemisphere syndrome, ADHD, controls) was recruited.
  • Participants were matched for age, gender, socioeconomic status, IQ, and handedness.
  • A reaction time battery was administered to measure performance speed across tasks.

Main Results:

  • Significant differences in average performance speed were found among the three groups (F(2,53) = 2.40, P < .01).
  • Children with developmental right hemisphere syndrome were significantly slower than both ADHD peers (t(35) = 1.99, P < .05) and controls (t(35) = 4.55, P < .001).
  • Children with ADHD were slower than controls, though this difference was not significant for most tasks.

Conclusions:

  • Slowness is an intrinsic and consistent characteristic of developmental right hemisphere syndrome.
  • The observed slowness in developmental right hemisphere syndrome is not solely a consequence of ADHD symptoms.

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