Infants' emerging ability to represent occluded object motion
Infants' emerging ability to represent occluded object motion
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DOI：
10.1016/s0010-0277(03)00166-5
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发表时间：
2004-02-01
期刊：
影响因子：
3.4
通讯作者：
von Hofsten, C
中科院分区：
文献类型：
--
作者：
Rosander, K;von Hofsten, C
在7-21周大的婴儿中研究了在咬合物上表现振荡运动物体的新能力。物体以0.25 Hz的速度移动，在轨迹中心被遮挡（持续0.3秒）或在一个转折点被遮挡（持续0.7秒）。每个试验持续20 s。他们测量了眼睛和头部的运动。通过正弦（变速）和三角形（匀速）两种运动，测试婴儿在预测运动物体再现时考虑速度变化的能力。在研究的年龄阶段，中央咬合器的表现从几乎完全不知道发生了什么发展到一致的预测行为。从12周左右开始，婴儿开始形成对移动物体的表征，这种表征持续存在于暂时的咬合中。在大约5个月大的时候，这些表征开始融入表征运动的动态。在单次试验中获得了较强的学习效果，但没有证据表明在两次试验之间有保留。个体差异是深刻的。(C) 2003 Elsevier B.V.版权所有
The emerging ability to represent an oscillating moving object over occlusions was studied in 7-21-week-old infants. The object moved at 0.25 Hz and was either occluded at the center of the trajectory (for 0.3 s) or at one turning point (for 0.7 s). Each trial lasted for 20 s. Both eye and head movements were measured. By using two kinds of motion, sinusoidal (varying velocity) and triangular (constant velocity), infants' ability to take velocity change into account when predicting the reappearance of the moving object was tested. Over the age period studied, performance at the central occluder progressed from almost total ignorance of what happened to consistent predictive behavior. From around 12 weeks of age, infants began to form representations of the moving object that persisted over temporary occlusions. At around 5 months of age these representations began to incorporate the dynamics of the represented motion. Strong learning effects were obtained over single trials, but there was no evidence of retention between trials. The individual differences were profound. (C) 2003 Elsevier B.V. All rights reserved.