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Related Experiment Video

Updated: Jul 14, 2026

Eye Tracking Young Children with Autism

Eye Tracking Young Children with Autism

Published on: March 27, 2012

Abnormal magnocellular pathway visual processing in infants at risk for autism.

Joseph P McCleery¹, Elizabeth Allman, Leslie J Carver

¹Department of Psychology, University of California, San Diego, La Jolla, California 92093, USA.

Biological Psychiatry

|May 29, 2007

Summary

Infants at high risk for autism spectrum disorder (ASD) show heightened sensitivity in the magnocellular (M) visual pathway by six months of age. This early M pathway difference may help in the early diagnosis of ASD.

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Area of Science:

Neuroscience
Developmental Psychology
Visual Perception

Background:

Autism spectrum disorder (ASD) is associated with face processing impairments.
These deficits may stem from abnormal development within the magnocellular (M) visual pathway.
The M pathway originates in the primate visual system and is involved in face processing.

Purpose of the Study:

To investigate the developmental hypothesis linking M pathway abnormalities to ASD.
To assess visual perceptual sensitivity in infants at high risk for ASD.
To compare M and P pathway function in high-risk versus low-risk infants.

Main Methods:

Visual perceptual data collected from 6-month-old high-risk infants (older sibling with ASD) and low-risk controls.
Utilized visual stimuli selectively targeting the magnocellular (M) and parvocellular (P) visual pathways.
Compared M and P pathway sensitivity between high-risk (n=13) and low-risk (n=26) infant groups.

Main Results:

High-risk infants showed identical P pathway sensitivity compared to controls.
Conversely, high-risk infants demonstrated nearly twofold greater M pathway sensitivity than controls.
No significant differences were observed in P pathway function.

Conclusions:

Preliminary findings suggest a potential association between abnormal M pathway function and ASD in infancy.
Early M pathway alterations may serve as a biomarker for the early diagnosis of ASD.
Family history of ASD is a significant factor in identifying infants for such developmental studies.