International Centre for Language and Communicative Development: Speech Inton...

Infants’ preference for faces with direct compared to averted eye gaze, and for infant-directed over adult-directed speech, reflects early sensitivity to social communication....婴儿偏好带有直视目光（direct eye gaze）而非回避性目光（averted eye gaze）的面孔，且相较于成人指向性言语（adult-directed speech），更偏好婴儿指向性言语（infant-directed speech），这一偏好反映了人类早期对社会沟通的敏感性……