Fig. 3

Anterior event-related potentials. a Illustration of the grand average event-related potential over frontal electrodes at 6 months. b Illustration of the grand average event-related potential over frontal electrodes at 12 months. c Mean amplitude of the late Nc component to faces or objects at 6 months in the three groups (low-risk control, HR-ASD+, and HR ASD-Neg). d Mean amplitude of the late Nc component to faces or objects at 6 months. e Mean offset latency of the late Nc component to faces or objects at 6 months. f Mean amplitude of the late Nc component to faces or objects at 12 months. All error bars are ±1 standard error