Development of an Objective Autism Risk Index Using Remote Eye Tracking

Area of Science:

• Neuroscience
• Developmental Psychology
• Biomedical Engineering

Background:

• Abnormal eye gaze patterns are a recognized characteristic of autism spectrum disorder (ASD).
• Previous research has identified distinct attention differences in individuals with ASD.
• Objective and reliable measures for assessing autism risk are needed.

Purpose of the Study:

• To develop an objective, eye-tracking-based index for assessing autism risk.
• To evaluate the diagnostic accuracy and clinical utility of this novel autism risk index.

Main Methods:

• Children referred for ASD evaluation were recruited for initial and replication studies.
• Remote eye tracking was employed, with dwell times recorded across predefined regions of interest.
• An autism risk index was calculated by averaging dwell times, and diagnostic accuracy was assessed using ROC curve analysis.

Main Results:

• The autism risk index demonstrated high diagnostic accuracy in both study samples (AUCs = 0.91 and 0.85).
• The index strongly correlated with Autism Diagnostic Observation Schedule-Second Edition (ADOS-2) severity scores.
• No significant correlation was found between the autism risk index and language ability.

Conclusions:

• The developed autism risk index shows potential as a quantitative and objective measure for identifying autism risk.
• Further validation in larger, diverse samples is warranted for clinical application.
• This tool could support clinical decision-making in ASD diagnosis and symptom monitoring.