Independent adaptation mechanisms for numerosity and size perception provide evidence against a common sense of magnitude.
Independent adaptation mechanisms for numerosity and size perception provide evidence against a common sense of magnitude.
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DOI：
10.1038/s41598-018-31893-6
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发表时间：
2018-09-11
影响因子：
4.6
通讯作者：
Turi M
中科院分区：
文献类型：
--
作者：
Anobile G;Burr DC;Iaia M;Marinelli CV;Angelelli P;Turi M
如何处理数值量是认知的核心问题。一方面，“数感理论”声称数字是可以直接感知的，并且可能代表获得数学技能的早期先兆。另一方面，“幅度理论”指出，数量与许多连续属性（例如大小和密度）相关，因此可能不作为独立特征存在，而是作为更一般的幅度系统的一部分。在这项研究中，我们研究了数量和大小感知之间敏感性的相互作用。在一组儿童中，我们从心理物理角度测量了两个感觉参数：知觉适应以及大小和数量的辨别阈值。参与者之间的数量和大小的歧视阈值和适应强度都没有相关性。这种明显缺乏相关性（由贝叶斯分析证实）表明数量和大小干扰效应不太可能反映共同的感官表征。我们认为这些小的干扰效应可能是由后期决策层发生的自上而下的现象造成的，而不是主要的“大小感”。
How numerical quantity is processed is a central issue for cognition. On the one hand the “number sense theory” claims that numerosity is perceived directly, and may represent an early precursor for acquisition of mathematical skills. On the other, the “theory of magnitude” notes that numerosity correlates with many continuous properties such as size and density, and may therefore not exist as an independent feature, but be part of a more general system of magnitude. In this study we examined interactions in sensitivity between numerosity and size perception. In a group of children, we measured psychophysically two sensory parameters: perceptual adaptation and discrimination thresholds for both size and numerosity. Neither discrimination thresholds nor adaptation strength for numerosity and size correlated across participants. This clear lack of correlation (confirmed by Bayesian analyses) suggests that numerosity and size interference effects are unlikely to reflect a shared sensory representation. We suggest these small interference effects may rather result from top-down phenomena occurring at late decisional levels rather than a primary “sense of magnitude”.
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