Maturation of cognitive control: delineating response inhibition and interference suppression

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Cognitive control enables task focus and inhibition of distractions or prepotent responses.
• Understanding the developmental trajectories of cognitive control subprocesses is crucial.

Purpose of the Study:

• To examine the developmental changes in response inhibition and interference suppression.
• To investigate electrophysiological indices associated with these cognitive control subprocesses.

Main Methods:

• Continuous EEG data were recorded from 13 adults (18 years) and 13 children (8-11 years).
• Participants completed a hybrid Go/Nogo flanker task measuring cognitive control.
• Analysis focused on N2 event-related potential topography and characteristics.

Main Results:

• N2 topography for both response inhibition and interference suppression showed age-related changes.
• Response inhibition showed a shift towards frontal distribution, with decreased amplitude and latency in adults compared to children.
• A significant N2 effect for interference suppression was observed in adults but not children, suggesting more diffuse activation in younger individuals.

Conclusions:

• Distinct maturational processes underlie response inhibition and interference suppression during late childhood and adolescence.
• These findings highlight the separability of these two key components of cognitive control.
• Developmental changes in neural activation patterns reflect maturation, potentially influenced by factors like myelination and cognitive load.