Developmental change in the acuity of the "Number sense": The approximate number system in 3-, 4-, 5-, and 6-year-olds and adults
Developmental change in the acuity of the "Number sense": The approximate number system in 3-, 4-, 5-, and 6-year-olds and adults
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DOI：
10.1037/a0012682
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发表时间：
2008-09-01
影响因子：
4
通讯作者：
Feigenson, Lisa
中科院分区：
文献类型：
--
作者：
Halberda, Justin;Feigenson, Lisa
行为学、神经心理学和大脑成像研究指出，在不同的发育阶段和不同的物种中，有一个专门的数字处理系统。这种基本的近似数系统（ANS）在多种模态上运行，形成场景中对象，声音或事件数量的表示。这个系统是不精确的，因此不同于精确计数。有证据表明，分辨率的ANS，指定的韦伯分数，随着年龄的增长，成年人可以区分numerosities，婴儿不能。然而，尚未确定9个月至成年期任何年龄段的参与者的韦伯分数，因此其发展轨迹尚不清楚。在这里，我们确定了韦伯分数的ANS在3-，4-，5-和6岁的儿童和成人。我们发现，该系统的分辨率在整个儿童期持续增加，在发育后期达到类似成人的敏锐度水平。
Behavioral, neuropsychological, and brain imaging research points to a dedicated system for processing number that is shared across development and across species. This foundational Approximate Number System (ANS) operates over multiple modalities, forming representations of the number of objects, sounds, or events in a scene. This system is imprecise and hence differs from exact counting. Evidence suggests that the resolution of the ANS, as specified by a Weber fraction, increases with age such that adults can discriminate numerosities that infants cannot. However, the Weber fraction has yet to be determined for participants of any age between 9 months and adulthood, leaving its developmental trajectory unclear. Here we identify the Weber fraction of the ANS in 3-, 4-, 5-, and 6-year-old children and in adults. We show that the resolution of this system continues to increase throughout childhood, with adultlike levels of acuity attained surprisingly late in development.