Infants' early visual attention and social engagement as developmental precursors to joint attention.
Salley B, Sheinkopf SJ, Neal-Beevers AR, Tenenbaum EJ, Miller-Loncar CL, Tronick E, Lagasse LL, Shankaran S, Bada H, Bauer C, Whitaker T, Hammond J, Lester BM. Infants' early visual attention and social engagement as developmental precursors to joint attention. Dev Psychol. 2016 11; 52(11):1721-1731.