Document Detail

Context affects the numerical semantic congruity effect in rhesus monkeys (Macaca mulatta).
MedLine Citation:
PMID:  20015467     Owner:  NLM     Status:  MEDLINE    
Do monkeys anchor their numerical judgments based on the context in which their choices are presented? We addressed this question by varying the numerical range across sessions while macaque monkeys made ordinal judgments. Monkeys were trained to make a conditional discrimination whereby they were reinforced for ordering arrays of dots in ascending or descending numerical order, dependent on a color cue. Monkeys were tested using two ranges of numerosities that converged on a single pair. Similar to the findings of Cantlon and Brannon (2005), we found a semantic congruity effect whereby decision time was systematically influenced by the congruity between the cue (ascending or descending) and the relative Numerical Magnitude of the stimuli within each range. Furthermore, monkeys showed a context effect, such that decision time for a given pair was dependent on whether it was a relatively small or large set of values compared to the other values presented in that session. This finding suggests that, similar to humans, the semantic congruity effect observed in monkeys is anchored by the context. Thus our data provide further evidence for the existence of a shared numerical comparison process in monkeys and humans.
Sarah M Jones; Jessica F Cantlon; Dustin J Merritt; Elizabeth M Brannon
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2009-12-14
Journal Detail:
Title:  Behavioural processes     Volume:  83     ISSN:  1872-8308     ISO Abbreviation:  Behav. Processes     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-17     Completed Date:  2010-05-20     Revised Date:  2013-06-14    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  191-6     Citation Subset:  IM    
Copyright Information:
Copyright 2009 Elsevier B.V. All rights reserved.
Department of Psychology and Neuroscience and Center for Cognitive Neuroscience, Duke University, Durham, NC 27708-0999, United States.
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MeSH Terms
Behavior, Animal / physiology
Decision Making
Discrimination Learning*
Macaca mulatta
Reaction Time
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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