Event Rate and Event-Related Potentials in ADHD

Autor/inn/en	Wiersema, Roeljan; Van Der Meere, Jaap; Roeyers, Herbert; Van, Coster, Rudy; Baeyens, Dieter
Titel	Event Rate and Event-Related Potentials in ADHD
Quelle	In: Journal of Child Psychology and Psychiatry, 47 (2006) 6, S.560-567 (8 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9630
DOI	10.1111/j.1469-7610.2005.01592.x
Schlagwörter	Attention Deficit Hyperactivity Disorder; Reaction Time; Cognitive Processes; Diagnostic Tests; Children; Task Analysis; Behavior Disorders; Correlation; Error Patterns + Suchen Sie Ihr Suchwort? Reaktionsvermögen; Cognitive process; Kognitiver Prozess; Diagnostic test; Diagnostischer Test; Child; Kind; Kinder; Aufgabenanalyse; Korrelation; Fehlertyp
Abstract	Background: It has been repeatedly found that performance of children with attention deficit hyperactivity disorder (ADHD) is more impaired when a long inter-stimulus interval (ISI) is used than when a short ISI is used. According to the cognitive-energetic model, this may reflect difficulty in remaining in an optimal motor activation state because of insufficient effort allocation. Method: Event-related potentials (ERPs) were evaluated during a Go/No-Go task that incorporates a condition with a fast and a slow presentation rate. Results: ADHD, whether or not comorbid with oppositional defiant/conduct disorder (ODD/CD), was associated with a steeper increase in reaction time (RT) from the fast to the slow condition accompanied by a missing increment of the parietal P3. Speed of responding was found to be correlated with P3 amplitude. In the fast condition, children with ADHD made more errors of commission, accompanied by a smaller No-Go N2, a component thought to be related to inhibition; however, after controlling for ODD/CD these differences disappeared. Conclusions: The association between the steeper increase in RT and reduced parietal P3s may indicate that the children with ADHD did not allocate enough extra effort to adjust to a potentially under-activated state. However, the event rate effects could not account for all of the differences between groups and also early automatic information processing stages seem disturbed in this disorder as indexed by larger P2 amplitudes. Alternative explanations are discussed. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10