Arousal-state modulation in children with AD/HD

Schematic presentation of each event-rate to Go stimuli. Stimulus presentation times denoted in milliseconds (ms).

Group means for Warning, Go and Nogo errors for each stimulus type and event-rate condition. Warn=button press to warning stimulus; Go=missed presses to Go stimuli; Nogo=presses to Nogo stimuli. Vertical lines show 1 standard error of the mean.

Grand mean ERPs to Warning and preceding Go/Nogo stimuli including the CNV between event-rates. For this and subsequent figures, vertical bars at Cz represent stimulus onset, amplitude in microvolts marked at Cz, ticks on horizontal axis represent 100ms. Solid line represents control children, dashed line represents children with AD/HD.

Significant group differences in ERP amplitude to Warning stimuli for (a) N1, (b) N2, (c) P2, and preceding Go/Nogo stimuli c) CNV-E and d) CNV-L. Unless otherwise specified, solid line, control; dashed line, AD/HD.

Grand mean ERPs to (a) Go and (b) Nogo stimuli between event rates. Solid line represents control children, dashed line represents children with AD/HD.