Stimulus-response incompatibility effects on event-related potentials in children with attention-deficit...

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Attention-deficit hyperactivity disorder (ADHD) is often associated with deficits in executive functions and response control.
• Previous research suggests potential response choice deficits in children with ADHD.

Purpose of the Study:

• To investigate the hypothesis of a response choice deficit in children with ADHD using a spatial stimulus-response compatibility (SRC) task.
• To analyze event-related potentials (ERPs) to understand the neural underpinnings of performance differences.

Main Methods:

• Recorded ERPs from 30 scalp electrodes in 21 ADHD and 21 typically developing boys during an SRC task.
• Compared behavioral performance (accuracy, response speed) and ERP components (N1, N2, P3, P650, NSW) between groups.

Main Results:

• ADHD children made fewer correct responses but did not exhibit a larger incompatibility effect on speed or accuracy.
• ADHD children displayed longer N1 latency and a larger frontal N2 condition effect, indicating increased frontal involvement.
• Task order influenced ERPs in ADHD children, with distinct effects on occipital P3, central P650, and parietal NSW compared to controls.

Conclusions:

• The findings suggest that children with ADHD exhibit strategic differences in information processing during the SRC task.
• The results do not support a specific response choice deficit but rather point to broader attentional and cognitive control variations.