Sensory deprivation: Visual experience alters the mental number line

Pasqualotto, Achille and Taya, Shuichiro and Proulx, Michael J. (2014) Sensory deprivation: Visual experience alters the mental number line. Behavioural Brain Research, 261 . pp. 110-113. ISSN 0166-4328 (Print) 1872-7549 (Online)

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Early studies on numeric cognition reported that numbers are spatially organised according to a left-to-right small-to-large ‘number line’. We investigated whether this spatial-number organisation is dictated by visual experience. We tested congenitally and late blind, and blindfolded sighted participants in a random number generation task where in one block their heads were alternately turned left or right before uttering the number. We found that the ‘random’ number generation was biased according to the side where the head was turned to. Consistent with the standard number line, participants with visual experience generated smaller numbers for left turns, and larger numbers for right turns. In contrast, participants without any visual experience showed the opposite pattern of results. These results suggest a role for visual experience in the development of spatial and numerical representations, which is supported by cultural differences in number representation, and provide converging evidence for visually driven organisation of the parietal cortex.
Item Type: Article
Uncontrolled Keywords: Number representation; Spatial representation; Blindness; Brain plasticity; Parietal cortex
Subjects: Q Science > Q Science (General)
Divisions: Faculty of Arts and Social Sciences
Faculty of Arts and Social Sciences > Academic programs > Cultural Studies
Depositing User: Achille Pasqualotto
Date Deposited: 17 Feb 2014 09:59
Last Modified: 02 Aug 2019 09:53

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