New Caledonian crows learn the functional properties of novel tool types.

New Caledonian crows were presented with Bird and Emery's (2009a) Aesop's fable paradigm, which requires stones to be dropped into a water-filled tube to bring floating food within reach. The crows did not spontaneously use stones as tools, but quickly learned to do so, and to choose objec...

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Autores principales:	Alex H Taylor, Douglas M Elliffe, Gavin R Hunt, Nathan J Emery, Nicola S Clayton, Russell D Gray
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/44f2391c337649258f1d681b4f8e2f1f
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id	oai:doaj.org-article:44f2391c337649258f1d681b4f8e2f1f
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spelling	oai:doaj.org-article:44f2391c337649258f1d681b4f8e2f1f2021-11-18T07:32:24ZNew Caledonian crows learn the functional properties of novel tool types.1932-620310.1371/journal.pone.0026887https://doaj.org/article/44f2391c337649258f1d681b4f8e2f1f2011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22194779/?tool=EBIhttps://doaj.org/toc/1932-6203New Caledonian crows were presented with Bird and Emery's (2009a) Aesop's fable paradigm, which requires stones to be dropped into a water-filled tube to bring floating food within reach. The crows did not spontaneously use stones as tools, but quickly learned to do so, and to choose objects and materials with functional properties. Some crows discarded both inefficient and non-functional objects before observing their effects on the water level. Interestingly, the crows did not learn to discriminate between functional and non-functional objects and materials when there was an arbitrary, rather than causal, link between object and reward. This finding suggests that the crows' performances were not based on associative learning alone. That is, learning was not guided solely by the covariation rate between stimuli and outcomes or the conditioned reinforcement properties acquired by functional objects. Our results, therefore, show that New Caledonian crows can process causal information not only when it is linked to sticks and stick-like tools but also when it concerns the functional properties of novel types of tool.Alex H TaylorDouglas M ElliffeGavin R HuntNathan J EmeryNicola S ClaytonRussell D GrayPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 12, p e26887 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alex H Taylor Douglas M Elliffe Gavin R Hunt Nathan J Emery Nicola S Clayton Russell D Gray New Caledonian crows learn the functional properties of novel tool types.
description	New Caledonian crows were presented with Bird and Emery's (2009a) Aesop's fable paradigm, which requires stones to be dropped into a water-filled tube to bring floating food within reach. The crows did not spontaneously use stones as tools, but quickly learned to do so, and to choose objects and materials with functional properties. Some crows discarded both inefficient and non-functional objects before observing their effects on the water level. Interestingly, the crows did not learn to discriminate between functional and non-functional objects and materials when there was an arbitrary, rather than causal, link between object and reward. This finding suggests that the crows' performances were not based on associative learning alone. That is, learning was not guided solely by the covariation rate between stimuli and outcomes or the conditioned reinforcement properties acquired by functional objects. Our results, therefore, show that New Caledonian crows can process causal information not only when it is linked to sticks and stick-like tools but also when it concerns the functional properties of novel types of tool.
format	article
author	Alex H Taylor Douglas M Elliffe Gavin R Hunt Nathan J Emery Nicola S Clayton Russell D Gray
author_facet	Alex H Taylor Douglas M Elliffe Gavin R Hunt Nathan J Emery Nicola S Clayton Russell D Gray
author_sort	Alex H Taylor
title	New Caledonian crows learn the functional properties of novel tool types.
title_short	New Caledonian crows learn the functional properties of novel tool types.
title_full	New Caledonian crows learn the functional properties of novel tool types.
title_fullStr	New Caledonian crows learn the functional properties of novel tool types.
title_full_unstemmed	New Caledonian crows learn the functional properties of novel tool types.
title_sort	new caledonian crows learn the functional properties of novel tool types.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/44f2391c337649258f1d681b4f8e2f1f
work_keys_str_mv	AT alexhtaylor newcaledoniancrowslearnthefunctionalpropertiesofnoveltooltypes AT douglasmelliffe newcaledoniancrowslearnthefunctionalpropertiesofnoveltooltypes AT gavinrhunt newcaledoniancrowslearnthefunctionalpropertiesofnoveltooltypes AT nathanjemery newcaledoniancrowslearnthefunctionalpropertiesofnoveltooltypes AT nicolasclayton newcaledoniancrowslearnthefunctionalpropertiesofnoveltooltypes AT russelldgray newcaledoniancrowslearnthefunctionalpropertiesofnoveltooltypes
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New Caledonian crows learn the functional properties of novel tool types.

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