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Spatial orienting and focused attention in attention deficit hyperactivity disorder
Author(s) -
NOVAK GERALD P.,
SOLANTO MARY,
ABIKOFF HOWARD
Publication year - 1995
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1995.tb01231.x
Subject(s) - cued speech , psychology , audiology , methylphenidate , event related potential , attention deficit hyperactivity disorder , latency (audio) , developmental psychology , selective attention , electroencephalography , cognitive psychology , neuroscience , cognition , clinical psychology , medicine , electrical engineering , engineering
Seventeen children with attention deficit disorder (ADHD) and 10 normal controls performed two tasks while event‐related potentials were recorded. ADHD subjects took part in two more sessions under methylphenidate (MP) or placebo. In the spatial orienting task, invalidly cued targets elicited a longer reaction time (RT) and a P 3 that was longer in latency and greater in amplitude than did validly cued targets. Performance was similar for both groups, but the early portion of P 3 (300–400 ms) was lower in amplitude for invalidly cued targets in ADHD subjects. MP increased accuracy without affecting RT and shortened P 3 peak latency and increased the amplitude of its early portion. In the focused attention task, accuracy was greater for controls and MP, but there were no RT differenees. Attended stimuli elicited greater amplitude P 1 , N 1 , and P 3 than did nonattended stimuli, but these measures were unaffected by diagnosis or medication.