The Importance of Longer Resting State Tasks when Examining ADHD

In this research, we investigate how brain activity differs between children with ADHD and TDC during a resting-state task. The objective is twofold: first, to replicate and extend the findings of Zhang et al. (2019), and second, to address specific methodological limitations identified in their research. The study sample consists of 32 children (15 without ADHD, 17 with ADHD). The study aimed at 10 minutes of eyes-open-resting EEG and divided into three 2.5-minute blocks after preprocessing. A significant difference was observed in the gender distribution, with a higher proportion of males in the ADHD group. Subjective ratings of Tediousness were significantly higher in children in the ADHD group. Frequency bands analysis did not show any significant Group x Time interaction effect, nor were there significant differences between the ADHD and TDC groups. These results are examined with predictions from the SRD model and suggest important methodological considerations for future EEG research in children with/without AD/HD.