Stimulus-response incompatibility effects on event-related potentials in children with attention-deficit hyperactivity disorder.
In order to test the hypothesis of a response choice deficit in attention-deficit hyperactivity disorder (ADHD) children, event-related potentials (ERPs) were recorded from 30 scalp electrodes in 21 ADHD and 21 normal boys during a spatial stimulus-response compatibility (SRC) task. ADHD children made fewer correct responses than control children, but did not show a larger incompatibility effect on response speed and accuracy. In ERPs, ADHD children had longer N1 latency and larger condition effect on the frontal N2, which would reflect a greater frontal involvement for the correct responses. The ADHD group who performed the SRC task first showed a larger condition effect on an early occipital P3 only, while the ADHD group who performed the SRC task second showed a larger condition effect on a later central P650 component and on a late parietal NSW, as compared with normal controls. These results suggest strategic differences in information processing in ADHD children, rather than a specific deficit.
Yong-Liang
G
G
Laboratoire de Psychophysiologie Cognitive et de Neuropsychiatrie, Hôpital Sainte-Justine, Université de Montréal, Canada.
Robaey
P
P
Karayanidis
F
F
Bourassa
M
M
Pelletier
G
G
Geoffroy
G
G
D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis*; D002648:Child; D002755:Choice Behavior; D003071:Cognition / Q000502:physiology*; D005071:Evoked Potentials / Q000502:physiology*; D006801:Humans; D008297:Male; D011930:Reaction Time; D013028:Space Perception / Q000502:physiology*