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Exploring Infant Sensitivity to Visual Language using Eye Tracking and the Preferential Looking Paradigm

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Published on: May 15, 2019

Different luminance- and texture-defined contrast sensitivity profiles for school-aged children.

Daphné Silvestre¹, Jacalyn Guy^1,2, Julie Hanck³

¹Perceptual Neuroscience Lab (PNLab) for Autism and Development, Department of Education and Counselling Psychology, McGill University, 3700 McTavish Street, Montreal, QC, H3A 1Y2, Canada.

Scientific Reports

|August 5, 2020

Summary

Visual brain development differs for luminance and texture. Contrast sensitivity to texture-defined vision matures earlier than luminance-defined vision in school-aged children.

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Area of Science:

Neuroscience
Developmental Psychology
Visual Science

Background:

Visual brain development research often focuses on luminance-defined information.
Everyday visual scenes contain complex information from both luminance and texture.
Limited research exists on texture-defined contrast sensitivity development during school years.

Purpose of the Study:

To investigate the development of contrast sensitivity to both luminance-defined and texture-defined static gratings in school-aged children.
To compare the developmental trajectories of processing luminance versus texture information.

Main Methods:

Assessed contrast sensitivity functions in children across various spatial frequencies (SFs).
Used luminance-modulated noise for luminance-defined gratings.
Used contrast-modulated noise for texture-defined gratings.

Main Results:

Contrast sensitivity functions showed distinct developmental profiles for luminance and texture.
Sensitivity to luminance-defined gratings matured by 9-10 years for all SFs.
Sensitivity to texture-defined gratings matured earlier: 5-6 years for low SFs and 7-8 years for high SFs.

Conclusions:

Luminance and texture information processing develop differently across SFs and age.
These findings highlight distinct developmental timelines for visual information processing pathways.