Department of Psychology, Cognitive and Developmental Psychology, University of Zurich, Switzerland.
Infant Behav Dev. 2012 Feb;35(1):22-8. doi: 10.1016/j.infbeh.2011.09.008. Epub 2011 Oct 20.
We examined 18- and 24-month-old infants' sensitivity to the functional relationships between time, speed, and distance. The task included a train moving first visibly and then into a tunnel. The movement of the train was always accompanied by a train-characteristic sound signalling the travel duration. After the train concluded its travel, infants were requested to search for it in two possible locations inside the tunnel. Infants' reaching and head turn behavior indicated that 24-month-olds were sensitive to time-speed-distance interrelations, while 18-month-olds showed no such understanding. Reducing occlusion duration (by shortening the tunnel's length) revealed an increase in 18-month-olds' reaching and anticipatory head turns. Results are discussed in terms of the developmental course of the understanding of time-speed-distance interrelations and the strength of infants' representations.
我们考察了 18 个月和 24 个月大的婴儿对时间、速度和距离之间的功能关系的敏感性。任务包括一辆火车先可见地移动，然后进入隧道。火车的运动总是伴随着一个火车特征的声音，指示旅行持续时间。火车完成旅行后，婴儿被要求在隧道内两个可能的位置寻找它。婴儿的伸手和转头行为表明，24 个月大的婴儿对时间-速度-距离的相互关系很敏感，而 18 个月大的婴儿则没有表现出这种理解。减少遮挡持续时间（通过缩短隧道的长度）增加了 18 个月大婴儿的伸手和预期的转头。研究结果从理解时间-速度-距离相互关系的发展过程和婴儿的代表性强度方面进行了讨论。
