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Updated: Feb 27, 2026
09:47
A Method to Quantify Visual Information Processing in Children Using Eye Tracking
Published on: July 9, 2016
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Developmental trajectory of neural specialization for letter and number visual processing
Joonkoo Park1,2, Berry van den Berg3, Crystal Chiang4
1Department of Psychological and Brain Sciences, University of Massachusetts, USA.
Developmental Science
|July 7, 2017
Summary
Children
Area of Science:
- Cognitive Neuroscience
- Developmental Psychology
- Visual Cognition
Background:
- Adult studies show distinct visual cortex activation for letters vs. numbers.
- This suggests reading and math experience shape visual processing.
- Developmental changes in this visual specialization are not well understood.
Purpose of the Study:
- To investigate developmental trajectories of visual processing for letters, numbers, and false fonts.
- To examine age-related differences in neural sensitivity to familiar vs. unfamiliar stimuli.
- To understand the impact of cultural inventions on visual cognition development.
Main Methods:
- Event-related potentials (ERPs) were recorded in 7-, 10-, 15-year-olds, and adults.
- Participants viewed letters, numbers, and false fonts.
- Neural activation patterns in the visual cortex were analyzed across age groups.
Main Results:
- 15-year-olds and adults showed lateralized visual cortex sensitivity (letters left, numbers right).
- Younger children (7- and 10-year-olds) lacked this letter/number dissociation.
- Significant ERP differences emerged between younger and older groups when contrasting familiar vs. unfamiliar stimuli.
Conclusions:
- Visual system tuning for letters and numbers refines throughout childhood and adolescence.
- This developmental process is influenced by learning to read and do math.
- Cultural tools profoundly shape human visual cognition and its development.
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