Impaired acuity of the approximate number system underlies mathematical learning disability (dyscalculia).

Impaired acuity of the approximate number system underlies mathematical learning disability (dyscalculia).
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DOI:
10.1111/j.1467-8624.2011.01608.x
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发表时间:
2011-07
期刊:
影响因子:
4.6
通讯作者:
Halberda J
Halberda J
中科院分区:
心理学1区
文献类型:
--
作者:
Mazzocco MM;Feigenson L;Halberda J

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尽管接受了足够的学校教育,许多儿童仍存在严重的数学学习障碍(MLD 或计算障碍)。我们假设 MLD 部分是由于近似数字系统 (ANS) 的缺陷造成的,该系统支持跨物种和整个发育过程中的非语言数字表示。在这里,我们通过对 ANS 敏锐度 (w) 以及 ANS 表示与数字词 (cv) 之间的映射的心理物理学评估来衡量,患有 MLD 的九年级学生的 ANS 精确度明显低于所有其他数学成绩组(低成绩、一般成绩和高成绩)的学生。即使在控制领域一般能力时,这种关系仍然存在。此外,这种 ANS 精确度并不能区分成绩较差的学生和成绩一般的学生,这表明 ANS 缺陷是 MLD 所特有的。
Many children have significant mathematical learning disabilities (MLD, or dyscalculia) despite adequate schooling. We hypothesize that MLD partly results from a deficiency in the Approximate Number System (ANS) that supports nonverbal numerical representations across species and throughout development. Here we show that ninth grade students with MLD have significantly poorer ANS precision than students in all other mathematics achievement groups (low-, typically-, and high-achieving), as measured by psychophysical assessments of ANS acuity (w) and of the mappings between ANS representations and number words (cv). This relationship persists even when controlling for domain-general abilities. Furthermore, this ANS precision does not differentiate low- from typically-achieving students, suggesting an ANS deficit that is specific to MLD.
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发表时间: 2004-06-01
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