Document Detail

Quantity judgments of sequentially presented food items by capuchin monkeys (Cebus apella).
MedLine Citation:
PMID:  18670794     Owner:  NLM     Status:  MEDLINE    
Recent assessments have shown that capuchin monkeys, like chimpanzees and other Old World primate species, are sensitive to quantitative differences between sets of visible stimuli. In the present study, we examined capuchins' performance in a more sophisticated quantity judgment task that required the ability to form representations of food quantities while viewing the quantities only one piece at a time. In three experiments, we presented monkeys with the choice between two sets of discrete homogeneous food items and allowed the monkeys to consume the set of their choice. In Experiments 1 and 2, monkeys compared an entirely visible food set to a second set, presented item-by-item into an opaque container. All monkeys exhibited high accuracy in choosing the larger set, even when the entirely visible set was presented last, preventing the use of one-to-one item correspondence to compare quantities. In Experiment 3, monkeys compared two sets that were each presented item-by-item into opaque containers, but at different rates to control for temporal cues. Some monkeys performed well in this experiment, though others exhibited near-chance performance, suggesting that this species' ability to form representations of food quantities may be limited compared to previously tested species such as chimpanzees. Overall, these findings support the analog magnitude model of quantity representation as an explanation for capuchin monkeys' quantification of sequentially presented food items.
Theodore A Evans; Michael J Beran; Emily H Harris; Daniel F Rice
Related Documents :
11170704 - Do chimpanzees know what conspecifics know?
11224164 - Choice between cocaine and food by rhesus monkeys: effects of conditions of food availa...
19685964 - Cooperatively breeding cottontop tamarins (saguinus oedipus) do not donate rewards to t...
10402034 - Tropical rain forest fragmentation, howler monkeys (alouatta palliata), and dung beetle...
20523064 - Basophil activation marker cd203c is useful in the diagnosis of hen's egg and cow's mil...
6615634 - Vagotomy produces learned food aversions in the rat.
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2008-08-01
Journal Detail:
Title:  Animal cognition     Volume:  12     ISSN:  1435-9456     ISO Abbreviation:  Anim Cogn     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-01-14     Completed Date:  2009-05-08     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9814573     Medline TA:  Anim Cogn     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  97-105     Citation Subset:  IM    
Language Research Center, Georgia State University, Atlanta, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Cebus / psychology*
Concept Formation*
Mathematical Concepts*
Pattern Recognition, Visual
Problem Solving*
Serial Learning
Grant Support

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

Previous Document:  What-where-when memory in magpies (Pica pica).
Next Document:  Reversible dysfunction of retinal ganglion cells in non-secreting pituitary tumors.