Log or Linear? Distinct Intuitions of the Number Scale in Western and Amazonian Indigene Cultures

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Log or Linear? Distinct Intuitions of the Number Scale in Western and Amazonian Indigene Cultures

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Title: Log or Linear? Distinct Intuitions of the Number Scale in Western and Amazonian Indigene Cultures
Author: Spelke, Elizabeth S.; Dehaene, Stanislas; Izard, Véronique; Pica, Pierre

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Citation: Dehaene, Stanislas, Véronique Izard, Elizabeth Spelke, and Pierre Pica. 2008. Log or linear? Distinct Intuitions of the number scale in Western and Amazonian indigene cultures. Science 320(5880): 1217-1220.
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Abstract: The mapping of numbers onto space is fundamental to measurement and to mathematics. Is this mapping a cultural invention or a universal intuition shared by all humans regardless of culture and education? We probed number-space mappings in the Mundurucu, an Amazonian indigene group with a reduced numerical lexicon and little or no formal education. At all ages, the Mundurucu mapped symbolic and nonsymbolic numbers onto a logarithmic scale, whereas Western adults used linear mapping with small or symbolic numbers and logarithmic mapping when numbers were presented nonsymbolically under conditions that discouraged counting. This indicates that the mapping of numbers onto space is a universal intuition and that this initial intuition of number is logarithmic. The concept of a linear number line appears to be a cultural invention that fails to develop in the absence of formal education.
Published Version: doi:10.1126/science.1156540
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10121959
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