Is visually guided reaching in early infancy a myth?
Is visually guided reaching in early infancy a myth?
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DOI：
10.1111/j.1467-8624.1993.tb04189.x
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发表时间：
1993-08
影响因子：
4.6
通讯作者：
R. K. Clifton;D. Muir;D. Ashmead;M. G. Clarkson
中科院分区：
文献类型：
--
作者：
R. K. Clifton;D. Muir;D. Ashmead;M. G. Clarkson
研究的问题是，婴儿是否需要看到他们的手时，第一次开始达到，接触，并抓住物体。7名婴儿在6至25周龄之间重复测试。每个阶段包括8个在光线中呈现的物体的试验和8个在完全黑暗中发光或发声的物体的试验。婴儿在两种条件下首次接触物体的年龄相当（平均年龄为12.3周，黑暗，11.9周）。婴儿第一次在16.0周的光线中抓住物体，在14.7周的黑暗中抓住物体，没有显着差异。一旦观察到接触，婴儿在整个过程中继续在光明和黑暗中触摸和抓住物体。由于婴儿在黑暗中看不到自己的手或手臂，他们在接触发光和发声物体方面的早期成功表明，本体感受线索，而不是肢体的视觉，指导了他们早期的接触。达到在黑暗中达到平行开发的光，这表明，视觉指导的手是没有必要实现对象的接触，无论是在发病成功达到或在随后的几周。
The issue examined was whether infants require sight of their hand when first beginning to reach for, contact, and grasp objects. 7 infants were repeatedly tested between 6 and 25 weeks of age. Each session consisted of 8 trials of objects presented in the light and 8 trials of glowing or sounding objects in complete darkness. Infants first contacted the object in both conditions at comparable ages (mean age for light, 12.3 weeks, and for dark, 11.9 weeks). Infants first grasped the object in the light at 16.0 weeks and in the dark at 14.7 weeks, a nonsignificant difference. Once contact was observed, infants continued to touch and grasp the objects in both light and dark throughout all sessions. Because infants could not see their hand or arm in the dark, their early success in contacting the glowing and sounding objects indicates that proprioceptive cues, not sight of the limb, guided their early reaching. Reaching in the light developed in parallel with reaching in the dark, suggesting that visual guidance of the hand is not necessary to achieve object contact either at the onset of successful reaching or in the succeeding weeks.