Indexing the approximate number system
Indexing the approximate number system
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DOI：
10.1016/j.actpsy.2013.11.009
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发表时间：
2014-01-01
影响因子：
1.8
通讯作者：
Gilmore, Camilla
中科院分区：
文献类型：
--
作者：
Inglis, Matthew;Gilmore, Camilla
近似数系统是一种认知系统，被认为是人类数学能力的基础。迄今为止，研究人员已经使用了四个主要的ANS敏锐度指标，并且通常假设它们测量的是相似的属性。在这里，我们报告了一项对这一假设提出质疑的研究。我们证明了数值比率效应具有较差的重测信度，并且它与韦伯分数或非符号比较任务的准确性无关。此外，我们表明，韦伯分数遵循一个强烈偏斜分布，他们有较低的测试-重测信度比一个简单的精度措施。我们的结论是，未来有兴趣索引ANS敏锐度个体差异的研究人员应该使用精度数字，而不是韦伯分数或数值比率效应。(C) 2013 Elsevier B.V.版权所有
Much recent research attention has focused on understanding individual differences in the approximate number system, a cognitive system believed to underlie human mathematical competence. To date researchers have used four main indices of ANS acuity, and have typically assumed that they measure similar properties. Here we report a study which questions this assumption. We demonstrate that the numerical ratio effect has poor test-retest reliability and that it does not relate to either Weber fractions or accuracy on nonsymbolic comparison tasks. Furthermore, we show that Weber fractions follow a strongly skewed distribution and that they have lower test-retest reliability than a simple accuracy measure. We conclude by arguing that in the future researchers interested in indexing individual differences in ANS acuity should use accuracy figures, not Weber fractions or numerical ratio effects. (C) 2013 Elsevier B.V. All rights reserved.