Infants Show Ratio-dependent Number Discrimination Regardless of Set Size.

Infants Show Ratio-dependent Number Discrimination Regardless of Set Size.
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DOI:
10.1111/infa.12008
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发表时间:
2013-11-01
期刊:
Infancy : the official journal of the International Society on Infant Studies
影响因子:
--
通讯作者:
Brannon EM
Brannon EM
中科院分区:
其他
文献类型:
--
作者:
Starr AB;Libertus ME;Brannon EM

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婴儿期近似数字系统(ANS)表征的证据是强大的,但通常只在婴儿被呈现四个或更多元素的数组时才被发现。此外,几项研究发现,当控制表面积和轮廓长度等连续变量时,婴儿无法区分小数字。这些研究结果表明,在某些情况下,婴儿未能招募的ANS或对象文件表示为小集。在这里,我们使用了一个数字变化检测范式,以评估6个月大的婴儿的能力,代表小值。在实验1中,婴儿被测试与1对3,1对2,2对3点。婴儿成功区分1与3和1与2,但未能区分2与3。在实验2中,我们测试了婴儿是否可以用2与4的条件比较小和大的值。在这两个实验中,婴儿的表现都表现出了比率依赖性,这是ANS的标志。我们的研究结果表明,婴儿可以参加纯粹的数值属性的小集合,数值变化检测范式访问ANS表示在婴儿期,无论集的大小。
Evidence for approximate number system (ANS) representations in infancy is robust but has typically only been found when infants are presented with arrays of four or more elements. In addition, several studies have found that infants fail to discriminate between small numbers when continuous variables such as surface area and contour length are controlled. These findings suggest that under some circumstances, infants fail to recruit either the ANS or object file representations for small sets. Here, we used a numerical change detection paradigm to assess 6-month-old infants’ ability to represent small values. In Experiment 1, infants were tested with 1 versus 3, 1 versus 2, and 2 versus 3 dots. Infants successfully discriminated 1 versus 3 and 1 versus 2, but failed with 2 versus 3. In Experiment 2, we tested whether infants could compare small and large values with a 2 versus 4 condition. Across both experiments, infants’ performance exhibited ratio dependence, the hallmark of the ANS. Our results indicate that infants can attend to the purely numerical attributes of small sets and that the numerical change detection paradigm accesses ANS representations in infancy regardless of set size.
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