Journal
FRONTIERS IN HUMAN NEUROSCIENCE
Volume 5, Issue -, Pages -Publisher
FRONTIERS RES FOUND
DOI: 10.3389/fnhum.2011.00165
Keywords
developmental dyscalculia; number processing; approximate number representation; exact number representation
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Funding
- National Research Fund of Belgium
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Studies on developmental dyscalculia (DD) have tried to identify a basic numerical deficit that could account for this specific learning disability. The first proposition was that the number magnitude representation of these children was impaired. However, Rousselle and Noel (2007) brought data showing that this was not the case but rather that these children were impaired when processing the magnitude of symbolic numbers only. Since then, incongruent results have been published. In this paper, we will propose a developmental perspective on this issue. We will argue that the first deficit shown in DD regards the building of an exact representation of numerical value, thanks to the learning of symbolic numbers, and that the reduced acuity of the approximate number magnitude system appears only later and is secondary to the first deficit.
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