To benefit from the exploration of their bodies and their physical and social environments, infants need to detect sensorimotor contingencies linking their actions to sensory feedback. This ability, which seems to be present in babies from birth and even in utero, has been widely used by researchers in their study of early development. However, a…

Over the first weeks and months following birth, infants' initial, broad-based perceptual sensitivities become honed to the characteristics of their native language. In this article, we review this process of emerging specialization within the context of a cascading "critical period" (CP) framework, in which periods of maximal openness…

Cardiac response to stimulation of the left and right perioral region in infants was examined. Cardiac acceleration and ipsilateral head turning occurred more reliably to stimulation of the infant's right side than to stimulation of the left side. Results reflect a difference in sensitivity at the infant's two sides. (SDH)