Infants' visual tracking of continuous circular motion under conditions of occlusion and non-occlusion
Infants' visual tracking of continuous circular motion under conditions of occlusion and non-occlusion
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DOI：
10.1016/s0163-6383(02)00119-4
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发表时间：
2002-01-01
影响因子：
2.1
通讯作者：
Boudreau, JP
中科院分区：
文献类型：
--
作者：
Gredebäck, G;von Hofsten, C;Boudreau, JP
我们调查了9个月大的婴儿水平和垂直凝视，同时跟踪一个完全可见或部分遮挡的目标移动在一个圆形轨迹。探讨了在这些任务中使用角膜反射技术（ASL）的可能性。数据显示，水平跟踪是成年人一样，在这个年龄段的频率调查（0.05-0.4赫兹），垂直跟踪是成年人一样，在三个最低的频率，而性能恶化0.4赫兹。在阻塞期间，成功预测的比率随着阻塞持续时间的增加而增加，从250到5,000 ms。在向封堵器的另一侧进行预测性移动之前的延迟时间也随着阻塞持续时间的增加而增加。这些预测不是基于简单的惯性应用，而是基于更复杂的非线性外推。(C)2002年爱思唯尔科技有限公司All rights reserved.
We investigated horizontal and vertical gaze in 9-month-old infants while tracking a fully visible or partly occluded target moving in a circular trajectory. The possibilities for using a corneal-reflection technique (ASL) in such tasks were explored. Data show that horizontal tracking is adult-like at this age over frequencies investigated (0.05-0.4 Hz), vertical tracking is adult-like over the three lowest frequencies, whilst performance deteriorated at 0.4 Hz. During occlusion the rate of successful predictions increased with increasing durations of occlusion, from 250 to 5,000 ms. The latency time before making a predictive move towards the other side of the occluder also increased with duration of occlusion. These predictions are not based on a simple application of inertia but based on more complex non-linear extrapolations. (C) 2002 Elsevier Science Inc. All rights reserved.