Journal
COGNITION
Volume 93, Issue 2, Pages B59-B68Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cognition.2004.01.004
Keywords
numerosity; number; development; infancy; area; numerical development
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Funding
- NIMH NIH HHS [R01 MH066154] Funding Source: Medline
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This brief report attempts to resolve the claim that infants preferentially attend to continuous variables over number [e.g. Psychol. Sci. 10 (1999) 408; Cognit. Psychol.44 (2002) 33] with the finding that when continuous variables are controlled, infants as young as 6-months of age discriminate large numerical values [e.g. Psychol. Sci. 14 (2003) 396; Cognition 89 (2003) 1315; Cognition 74 (2000) B1]. In two parallel experiments, we compare 6-month-old infants' ability to discriminate number and ignore continuous variables with their ability to form a representation of a cumulative surface area and ignore number. We find that infants discriminate a 2-fold change in number but fail to discriminate a 2-fold change in cumulative surface area. The results point to a more complicated relationship between discrete and continuous dimensions than implied by previous literature. (C) 2004 Published by Elsevier B.V.
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