Development of Prosocial Behaviors and Related Brain Network in Infants of High and Low Risk of ASD

The goal of this observational study is to compare the developmental trajectories of prosocial behaviors and functional network connections in infants and toddlers at high and low risk of autism spectrum disorder (ASD). The main questions it aims to answer are what the differences in prosocial behaviors and related brain network connections between infants/toddlers at high and low risk of ASD are. Participants will receive developmental and social communicational assessments (Griffiths Mental Developmental Scales, Peabody Developmental Motor Scales, The Communication and Symbolic Behavior Scales Developmental Profile Infant-Toddler Checklist), resting-state EEG and MRI in a natural sleeping state.