Development of children's performance and ERP components in the equiprobable Go/NoGo task

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• The equiprobable Go/NoGo task is typically considered to involve minimal inhibition due to the absence of a dominant Go stimulus.
• Children exhibit significant difficulty with this task, accompanied by a pronounced frontal NoGo N2 component.
• Previous research indicated a role for the 'child N2' in inhibition, linking larger frontal N2b amplitudes to reduced commission errors.

Purpose of the Study:

• To investigate age-related developmental differences in the NoGo N2b component and other electroencephalography (EEG) event-related potential (ERP) components during the equiprobable Go/NoGo task.
• To explore the inhibitory role of the NoGo N2b in children of different age groups within this specific task paradigm.

Main Methods:

• Two groups of children, Younger (8.0–10.3 years) and Older (10.4–12.8 years), participated in the study.
• Participants completed an equiprobable Go/NoGo task with random sequences of Go and NoGo tone stimuli.
• Temporal Principal Component Analysis (PCA) was used to quantify and compare Go and NoGo event-related potentials (ERPs) between the age groups.

Main Results:

• Older children demonstrated significantly faster reaction times (RT) and fewer omission and commission errors compared to Younger children.
• A developmental difference was observed, with Older children exhibiting systematically reduced Go component latencies (approx. 7.4%) compared to Younger children.
• Within the Older group, larger frontocentral NoGo N2b amplitudes were correlated with fewer commission errors, suggesting an inhibitory function.

Conclusions:

• The findings support a differential sequential processing schema for Go and NoGo stimuli, similar to that observed in adults.
• The NoGo N2b component in the equiprobable Go/NoGo task functions as an individual marker of inhibitory control in older children, but not in younger children.
• Developmental improvements in inhibitory control are evident in older children, reflected in both behavioral performance and neural activity.