婴儿利用物体形状来牢固抓握的发育差异。
Developmental differences in infants' use of an object's shape to grasp it securely.
作者信息
Barrett Tracy M, Needham Amy
机构信息
Department of Psychology and Neuroscience, Duke University, Durham, NC 27708-0086, USA.
出版信息
Dev Psychobiol. 2008 Jan;50(1):97-106. doi: 10.1002/dev.20280.
This study examined twenty two 11- and 13-month-old infants' approach and grasp of two objects-one symmetric and one asymmetric-in an effort to understand infants' use of shape information to plan motor action. At first contact, all infants grasped the asymmetrical object further from its center of mass than the symmetrical object. In addition, results highlighted developmental differences in infants' abilities to correct for less stable hand placements, to maintain control of the objects without dropping, strategies used to obtain the objects, and latencies to grasp the objects. Older infants showed more effective skills in each of the aforementioned areas. Implications for our understanding of the development of processing of visual information for action are discussed.
本研究观察了22名11个月和13个月大的婴儿对两个物体(一个对称物体和一个不对称物体)的接近和抓握情况,旨在了解婴儿如何利用形状信息来规划动作。在初次接触时,所有婴儿抓握不对称物体的位置都比抓握对称物体时离其质心更远。此外,研究结果还凸显了婴儿在纠正不太稳定的手部位置、在不掉落的情况下保持对物体的控制、获取物体所采用的策略以及抓握物体的潜伏期等能力方面的发育差异。年龄较大的婴儿在上述各个方面都表现出更有效的技能。本文还讨论了这些结果对于我们理解视觉信息处理用于动作发展的意义。