婴儿期表征连续范围的困难：使用数字更容易。
The difficulties of representing continuous extent in infancy: using number is just easier.
作者信息
Cordes Sara, Brannon Elizabeth M
机构信息
Center for Cognitive Neuroscience, Duke University, Box 90999, Durham, NC 27708, USA.
出版信息
Child Dev. 2008 Mar-Apr;79(2):476-89. doi: 10.1111/j.1467-8624.2007.01137.x.
Abstract
This study investigates the ability of 6-month-old infants to attend to the continuous properties of a set of discrete entities. Infants were habituated to dot arrays that were constant in cumulative surface area yet varied in number for small (< 4) or large (> 3) sets. Results revealed that infants detected a 4-fold (but not 3-fold) change in area, regardless of set size. These results are in marked contrast to demonstrations that infants of the same age successfully discriminate a 2- or 3-fold change in number, providing strong counterevidence to the claim that infants use solely nonnumerical, continuous extent variables when discriminating sets. These findings also shed light on the processes involved in tracking continuous variables in infants.
摘要
本研究考察了6个月大婴儿关注一组离散实体的连续属性的能力。婴儿先熟悉了在累积表面积上保持恒定但在小（<4）或大（>3）集合中数量不同的点阵。结果显示，无论集合大小如何，婴儿都能察觉到面积4倍（而非3倍）的变化。这些结果与同年龄婴儿成功辨别数量2倍或3倍变化的演示形成显著对比，有力地反驳了婴儿在辨别集合时仅使用非数字的连续范围变量这一说法。这些发现也揭示了婴儿追踪连续变量所涉及的过程。
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