Document Detail

Ordinal judgments of numerical symbols by macaques (Macaca mulatta).
MedLine Citation:
PMID:  11537106     Owner:  NASA     Status:  MEDLINE    
Two rhesus monkeys (Macaca mulatta) learned that the arabic numerals 0 through 9 represented corresponding quantities of food pellets. By manipulating a joystick, the monkeys were able to make a selection of paired numerals presented on a computer screen. Although the monkeys received a corresponding number of pellets even if the lesser of the two numerals was selected, they learned generally to choose the numeral of greatest value even when pellet delivery was made arrhythmic. In subsequent tests, they chose the numerals of greater value when presented in novel combinations or in random arrays of up to five numerals. Thus, the monkeys made ordinal judgments of numerical symbols in accordance with their absolute or relative values.
D A Washburn; D M Rumbaugh
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Psychological science     Volume:  2     ISSN:  0956-7976     ISO Abbreviation:  Psychol Sci     Publication Date:  1991 May 
Date Detail:
Created Date:  1995-06-16     Completed Date:  1995-06-16     Revised Date:  2011-05-20    
Medline Journal Info:
Nlm Unique ID:  9007542     Medline TA:  Psychol Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  190-3     Citation Subset:  S    
Georgia State University.
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MeSH Terms
Behavior, Animal*
Discrimination (Psychology)*
Macaca mulatta / psychology*
Pattern Recognition, Visual*
D M Rumbaugh / Georgia St U, Atlanta, Dept Psychology

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