Document Detail

Ratio abstraction by 6-month-old infants.
MedLine Citation:
PMID:  17680947     Owner:  NLM     Status:  MEDLINE    
Human infants appear to be capable of the rudimentary mathematical operations of addition, subtraction, and ordering. To determine whether infants are capable of extracting ratios, we presented 6-month-old infants with multiple examples of a single ratio. After repeated presentations of this ratio, the infants were presented with new examples of a new ratio, as well as new examples of the previously habituated ratio. Infants were able to successfully discriminate two ratios that differed by a factor of 2, but failed to detect the difference between two numerical ratios that differed by a factor of 1.5. We conclude that infants can extract a common ratio across test scenes and use this information while examining new displays. The results support an approximate magnitude-estimation system, which has also been found in animals and human adults.
Koleen McCrink; Karen Wynn
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Psychological science     Volume:  18     ISSN:  0956-7976     ISO Abbreviation:  Psychol Sci     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-08-07     Completed Date:  2007-11-05     Revised Date:  2011-05-20    
Medline Journal Info:
Nlm Unique ID:  9007542     Medline TA:  Psychol Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  740-5     Citation Subset:  IM    
Yale University, USA.
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MeSH Terms
Cognition / physiology
Discrimination (Psychology) / physiology*
Habituation, Psychophysiologic / physiology
Infant Behavior / psychology*
Recognition (Psychology) / physiology
Visual Perception / physiology

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