Grade-related changes in event-related potentials (ERPs) in primary school children: differences between two reading...

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Learning to read involves complex cognitive processes.
• Event-related potentials (ERPs) offer insights into the neural dynamics of reading development.
• Longitudinal studies are crucial for understanding developmental trajectories.

Purpose of the Study:

• To investigate age-related changes in brain activity during word reading in children.
• To examine differences in ERPs between repeated and single word presentations.
• To correlate ERP patterns with reading proficiency and hemispheric function.

Main Methods:

• Recorded ERPs from temporal and parietal sites in children from Grade 1 over three years.
• Utilized two word-reading tasks: repeated word presentation and single word presentation.
• Analyzed changes in ERP component amplitudes and asymmetries (P240, N530, N150, SW, N360) with grade level and reading proficiency.

Main Results:

• ERP component amplitudes (P240, N530, N150, SW) decreased with grade, while others (temporal N360, SW) increased.
• Hemispheric asymmetries in SW and N360 emerged and strengthened with grade.
• Proficient readers exhibited larger asymmetries and faster response times.
• Positive correlations found between reading performance and left temporal ERPs in later grades, especially for single-word tasks.

Conclusions:

• ERP measures demonstrate significant age-related changes in neural activity during reading acquisition.
• Developmental shifts in hemispheric engagement are evident in reading.
• ERP patterns can differentiate reading proficiency and predict reading performance, reflecting underlying neural maturation and functional specialization.