What does a child's ability to look where another is looking tell us about his or her early cognitive development? What does this ability-or lack thereof-tell us about a child's language development, understanding of other's intentions, and the emergence of autism? This volume assembles several years of research on the processing of gaze information and its relationship to early social-cognitive development in infants spanning many age groups. Gaze-Following examines how humans and non-human primates use another individual's direction of gaze to learn about the world around them. The chapters throughout this volume address development in areas including joint attention, early non-verbal social interactions, language development, and theory of mind understanding. Offering novel insights regarding the significance of gaze-following, the editors present research from a neurological and a behavioral perspective, and compare children with and without pervasive developmental disorders. Scholars in the areas of cognitive development specifically, and developmental science more broadly, as well as clinical psychologists will be interested in the intriguing research presented in this volume.