Reduced attention to social information is a promising biomarker for ASD. In collaboration with Dr. Jessica Bradshaw at USC, we aim to identify social attention patterns and characterize developmental trajectories of social attention associated with early risk for ASD, before a reliable ASD diagnosis can be determined. In the longitudinal study, we assess infants between 1 and 36 months in narrow age intervals. Infants’ attention is measured using eye tracking, lab observations, and parents reports in various task contexts. We also examine infants’ motor, social communication, and language abilities.