Organization of visual-tracking responses in human infants

Twenty-one infants were presented repetitions of a left-to-right row sequence of six lights. When a S was judged to be tracking lights, the row sequence was interrupted. In interrupted sequences two adjacent lights in the row did not go on. Videotaped records of the infants' eye movements were scored to determine patterns of visual tracking. All Ss showed an initial persistent tendency to track only in strings of adjacent lights. Ninty-three percent of ocular responses by the infants to offset of the light immediately preceding interruption were movements to the right. Changes in response organization were discussed in reference to Piaget's concept of ordering of the world through successive accommodations of organized patterns of response.