| Estimating and operating on discrete quantities in orangutans (Pongo pygmaeus). | |
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MedLine Citation:
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PMID: 10890585 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study investigated the ability of 3 male orangutans (Pongo pygmaeus; 1 subadult, 2 adults) to estimate, compare, and operate on 2 sets of small quantities (1-6 cereal bits). Experiment 1 investigated the orangutans' ability to choose the larger of 2 quantities when they were presented successively as opposed to simultaneously, thus being perceptually unavailable at the time of choice. Experiment 2 investigated the orangutans' ability to select the larger quantity after the original quantities were augmented or reduced. Orangutans were capable of selecting the larger of 2 quantities in Experiment 1. There was also some evidence from Experiment 2, albeit weaker, that orangutans may mentally combine quantities (but not dissociate) to obtain the larger of 2 quantities. This study suggests that orangutans use a representational mechanism (especially when comparing quantities) to select the larger of 2 sets of items. |
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Authors:
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J Call |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Journal of comparative psychology (Washington, D.C. : 1983) Volume: 114 ISSN: 0735-7036 ISO Abbreviation: J Comp Psychol Publication Date: 2000 Jun |
Date Detail:
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Created Date: 2000-10-31 Completed Date: 2000-10-31 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8309850 Medline TA: J Comp Psychol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 136-47 Citation Subset: IM |
Affiliation:
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Max-Planck-Institute for Evolutionary Anthropology, Leipzig, Germany. call@eva.mpg.de |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Choice Behavior* Humans Male Memory, Short-Term* Pongo pygmaeus / psychology* Size Perception* |
| Grant Support | |
ID/Acronym/Agency:
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RR-00165/RR/NCRR NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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