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How tufted capuchin monkeys (Cebus apella spp) and common chimpanzees (Pan troglodytes) align objects to surfaces: Insights into spatial reasoning and implications for tool use

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How tufted capuchin monkeys (Cebus apella spp) and common chimpanzees (Pan troglodytes) align objects to surfaces: Insights into spatial reasoning and implications for tool use

Auteurs : Dorothy M. Fragaszy ; Brian Stone ; Nicole M. Scott ; Charles Menzel

Source :

RBID : PMC:3166442

Abstract

This report addresses phylogenetic variation in a spatial skill that underlies tool use: aligning objects to a feature of a surface. Fragaszy and Cummins-Sebree’s [2005] model of relational spatial reasoning and Skill Development and Perception-Action theories guided the design of the study. We examined how capuchins and chimpanzees place stick objects of varying shapes into matching grooves on a flat surface. Although most individuals aligned the long axis of the object with the matching groove more often than expected by chance, all typically did so with poor precision. Some individuals managed to align a second feature, and only one (a capuchin monkey) achieved above-chance success at aligning three features with matching grooves. Our findings suggest that capuchins and chimpanzees do not reliably align objects along even one axis, and that neither species can reliably or easily master object placement tasks that require managing two or more spatial relations concurrently. Moreover, they did not systematically vary their behavior in a manner that would aid discovery of the affordances of the stick-surface combination beyond sliding the stick along the surface (which may have provided haptic information about the location of the groove). These limitations have profound consequences for the forms of tool use we can expect these individuals to master.


Url:
DOI: 10.1002/ajp.20966
PubMed: 21608008
PubMed Central: 3166442


Affiliations:


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PMC:3166442

Le document en format XML

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) align objects to surfaces: Insights into spatial reasoning and implications for tool use</title>
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<name sortKey="Menzel, Charles" sort="Menzel, Charles" uniqKey="Menzel C" first="Charles" last="Menzel">Charles Menzel</name>
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model of relational spatial reasoning and Skill Development and Perception-Action theories guided the design of the study. We examined how capuchins and chimpanzees place stick objects of varying shapes into matching grooves on a flat surface. Although most individuals aligned the long axis of the object with the matching groove more often than expected by chance, all typically did so with poor precision. Some individuals managed to align a second feature, and only one (a capuchin monkey) achieved above-chance success at aligning three features with matching grooves. Our findings suggest that capuchins and chimpanzees do not reliably align objects along even one axis, and that neither species can reliably or easily master object placement tasks that require managing two or more spatial relations concurrently. Moreover, they did not systematically vary their behavior in a manner that would aid discovery of the affordances of the stick-surface combination beyond sliding the stick along the surface (which may have provided haptic information about the location of the groove). These limitations have profound consequences for the forms of tool use we can expect these individuals to master.</p>
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<article-title>How tufted capuchin monkeys (
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spp) and common chimpanzees (
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University of Georgia</aff>
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<corresp id="CR1">Corresponding author: D. Fragaszy, Department of Psychology, University of Georgia, Athens, GA 30602-3013,
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<p id="P1">Dorothy Fragaszy, Brian Stone, and Nicole Scott, Department of Psychology, University of Georgia, Athens, GA, USA 30602. Nicole Scott is currently in the Cognitive Science program at the University of Minnesota.</p>
<p id="P2">Charles Menzel, Language Research Center, Georgia State University, Atlanta, GA USA 300047.</p>
<p id="P3">Correspondence concerning this article should be addressed to Dorothy Fragaszy, Department of Psychology, University of Georgia, Athens, GA, USA 30602</p>
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<p id="P4">This report addresses phylogenetic variation in a spatial skill that underlies tool use: aligning objects to a feature of a surface.
<xref ref-type="bibr" rid="R15">Fragaszy and Cummins-Sebree’s [2005]</xref>
model of relational spatial reasoning and Skill Development and Perception-Action theories guided the design of the study. We examined how capuchins and chimpanzees place stick objects of varying shapes into matching grooves on a flat surface. Although most individuals aligned the long axis of the object with the matching groove more often than expected by chance, all typically did so with poor precision. Some individuals managed to align a second feature, and only one (a capuchin monkey) achieved above-chance success at aligning three features with matching grooves. Our findings suggest that capuchins and chimpanzees do not reliably align objects along even one axis, and that neither species can reliably or easily master object placement tasks that require managing two or more spatial relations concurrently. Moreover, they did not systematically vary their behavior in a manner that would aid discovery of the affordances of the stick-surface combination beyond sliding the stick along the surface (which may have provided haptic information about the location of the groove). These limitations have profound consequences for the forms of tool use we can expect these individuals to master.</p>
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