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Journal ArticleDOI

Finger gnosia: a predictor of numerical abilities in children?

Marie-Pascale Noël
- 01 Oct 2005 - 
- Vol. 11, Iss: 5, pp 413-430
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TLDR
It is indicated that, contrary to the general measures of cognitive development, performance in the finger gnosia test was a good predictor of numerical skills 1 year later but not of reading skills, which proves the specificity of that predictor.
Abstract
This paper aimed to test the specificity of predicting power of finger gnosia on later numerical abilities in school-age children and to contribute to the understanding of this effect. Forty-one children were tested in the beginning of Grade 1 on finger gnosia, left-right orientation (another sign of the Gerstmann "syndrome"), and global development. Fifteen months later, numerical and reading abilities were assessed. Analyses of the results indicated that, contrary to the general measures of cognitive development, performance in the finger gnosia test was a good predictor of numerical skills 1 year later but not of reading skills, which proves the specificity of that predictor. The same conclusion was also true for the left-right orientation. However, finger gnosia could equally predict performance in numerical tasks that do or do not rely heavily on finger representation or on magnitude representation. Results are discussed in terms of the localizationist and the functional hypotheses.

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Citations
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TL;DR: It is suggested that children with mathematics learning disabilities have difficulty in accessing number magnitude from symbols rather than in processing numerosity per se.
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TL;DR: The neural bases of numerosity processing have been investigated in structural and functional neuroimaging studies of adults and children, and neural markers of its impairment in dyscalculia have been identified.
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Foundational numerical capacities and the origins of dyscalculia.

TL;DR: It is argued that a deficit in numerosity coding, not in the approximate number system or the small number system, is responsible for dyscalculia.
References
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Cerebral Pathways for Calculation: Double Dissociation between Rote Verbal and Quantitative Knowledge of Arithmetic

TL;DR: It is suggested that a left subcortical network contributes to the storage and retrieval of rote verbal arithmetic facts, while a bilateral inferior parietal network is dedicated to the mental manipulation of numerical quantities.
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