Abstract
Objective: Inaccurate and inconsistent response styles in attention-deficit/hyperactivity disorder (ADHD) have been observed in a wide variety of cognitive tasks, in line with regulatory deficit models of ADHD. Event-related potential (ERP) studies of error processing have provided evidence for these models, but are limited in specificity. We aimed to improve the isolation, localization and identification of error (self-monitoring and adaptive control) and post-error (implementation of cognitive control) processing in ADHD. Methods: ERPs were obtained for 46 ADHD and 51 typically developing (TD) children using the stop-signal task. Response-locked error (Ne and Pe) and stimulus-locked post-error (N2) components were compared between groups. Ne/Pe were corrected for preceding stimulus overlap and group differences were localized. Results: Ne was intact, while Pe amplitude was markedly reduced in children with ADHD (ηp2 = 0.14). Pe differences were localized in the dorsal posterior/midcingulate (BA31/24) cortex. While the TD group showed increased N2 amplitude in post-error trials (ηp2 = 0.24), localized in the left ventrolateral prefrontal cortex (VLPFC) and angular gyrus, the ADHD group did not. Conclusions: Self-regulation deficits in ADHD are associated with later stages of error processing and subsequent implementation of cognitive control. Significance: We contribute to the literature by further specifying error processing deficits in ADHD.
Original language | English |
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Pages (from-to) | 2236-2249 |
Number of pages | 14 |
Journal | Clinical neurophysiology |
Volume | 131 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sept 2020 |
Keywords
- ADHD
- Error-processing
- Event-related potentials
- Source-localization