['We examined whether children (8-11 years) diagnosed with Pervasive Developmental Disorder-Not Otherwise Specified (PDD-NOS) or Attention-Deficit/Hyperactivity Disorder (ADHD) showing primarily hyperactive behavior, differed in selective attention and working memory (WM) abilities.', 'Healthy controls and children with ADHD, PDD-NOS or symptoms of both disorders (PDD/HD) (n=15 in each group) carried out a visual selective memory search task while their EEG was recorded from which event-related potentials were derived.', 'Compared to the control group, all patient groups made more omissions while hyperactive children also exhibited more false alarms. Regarding the process of WM-controlled search, significant group differences in ERP data were found between the control group and each of the clinical groups.'] Does eRP correlate of selective attention and working memory capacities in children with ADHD and/or PDD-NOS?