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Effects of development and enculturation on number representation in the brain
- D. Ansari
- Psychology, BiologyNature Reviews Neuroscience
- 1 April 2008
This Review provides an evaluation of the contention that cultural number symbols acquire their meaning by being mapped onto non-symbolic representations of numerical magnitude and proposes hypotheses to guide investigations into the neural mechanisms that constrain the acquisition of cultural representations of numeric magnitude.
Mapping numerical magnitudes onto symbols: the numerical distance effect and individual differences in children's mathematics achievement.
Impaired parietal magnitude processing in developmental dyscalculia
Using developmental trajectories to understand developmental disorders.
- Michael S. C. Thomas, D. Annaz, D. Ansari, G. Scerif, C. Jarrold, A. Karmiloff-Smith
- Medicine, PsychologyJournal of speech, language, and hearing research…
- 1 April 2009
Two conclusions were reached: an understanding of the underlying mechanism will be furthered by the richer descriptive vocabulary provided by the trajectories approach and an optimal design for studying developmental disorders is to combine initial cross-sectional designs with longitudinal follow-up.
To retrieve or to calculate? Left angular gyrus mediates the retrieval of arithmetic facts during problem solving
Age-related Changes in the Activation of the Intraparietal Sulcus during Nonsymbolic Magnitude Processing: An Event-related Functional Magnetic Resonance Imaging Study
It is proposed that developmental impairments of number may be associated with atypical specialization of cortical regions underlying magnitude processing, and even the most basic aspects of numerical cognition are subject to age-related changes in functional neuroanatomy.
How do symbolic and non-symbolic numerical magnitude processing skills relate to individual differences in children's mathematical skills? A review of evidence from brain and behavior
Nonsymbolic numerical magnitude comparison: reliability and validity of different task variants and outcome measures, and their relationship to arithmetic achievement in adults.
Neural correlates of symbolic number processing in children and adults
- D. Ansari, Nicolas Garcia, Elizabeth K. Lucas, Kathleen M. Hamon, B. Dhital
- 7 November 2005
It is concluded that the functional neuroanatomy underlying symbolic numerical magnitude processing undergoes an ontogenetic shift towards greater parietal engagement, which may reflect maturation of underlying representations and increasing automaticity in mapping between numerical symbols and the magnitudes they represent.
Atypical development of language and social communication in toddlers with Williams syndrome
Williams syndrome (WS) is a genetic disorder which results in an uneven cognitive profile. Despite superior language compared to other syndromes in the phenotypic outcome, toddlers with WS are as…