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Ashmead, Daniel H.; McCarty, Michael E. – Child Development, 1991
Postural sway was measured in 12- to 14-month-old infants and adults while they were standing in the light and dark. Infants did not sway significantly more in the dark than in the light, whereas adults did. These findings indicate that early regulation of standing posture does not depend on visual information. (Author)
Descriptors: Adults, Age Differences, Human Posture, Infants

Rider, Elizabeth A.; Rieser, John J. – Child Development, 1988
Six experiments were conducted to investigate the sensitivity of one- to four-year-olds to changes in perspective that are occluded from view. Results indicated relatively early sensitivity to proprioceptive cues for changes in perspective and somewhat later sensitivity to appropriate visual-environmental cues. (PCB)
Descriptors: Age Differences, Child Development, Environmental Influences, Physical Environment