Document Detail

A shared system of representation governing quantity discrimination in canids.
MedLine Citation:
PMID:  23060847     Owner:  NLM     Status:  PubMed-not-MEDLINE    
One way to investigate the evolution of cognition is to compare the abilities of phylogenetically related species. The domestic dog (Canis lupus familiaris), for example, still shares cognitive abilities with the coyote (Canis latrans). Both of these canids possess the ability to make psychophysical "less/more" discriminations of food based on quantity. Like many other species including humans, this ability is mediated by Weber's Law: discrimination of continuous quantities is dependent on the ratio between the two quantities. As two simultaneously presented quantities of food become more similar, choice of the large or small option becomes random in both dogs and coyotes. It remains unknown, however, whether these closely related species within the same family - one domesticated, and one wild - make such quantitative comparisons with comparable accuracy. Has domestication honed or diminished this quantitative ability? Might different selective and ecological pressures facing coyotes drive them to be more or less able to accurately represent and discriminate food quantity than domesticated dogs? This study is an effort to elucidate this question concerning the evolution of non-verbal quantitative cognition. Here, we tested the quantitative discrimination ability of 16 domesticated dogs. Each animal was given nine trials in which two different quantities of food were simultaneously displayed to them. The domesticated dogs' performance on this task was then compared directly to the data from 16 coyotes' performance on this same task reported by Baker et al. (2011). The quantitative discrimination abilities between the two species were strikingly similar. Domesticated dogs demonstrated similar quantitative sensitivity as coyotes, suggesting that domestication may not have significantly altered the psychophysical discrimination abilities of canids. Instead, this study provides further evidence for similar non-verbal quantitative abilities across multiple species.
Joseph M Baker; Justice Morath; Katrina S Rodzon; Kerry E Jordan
Related Documents :
2717927 - Environmental stress in five aquatic ecosystems in the floodplain of the river rhine.
8885427 - Temporal changes in concentration of radiocaesium in lake sediment and fish of southern...
17242977 - Metal fractionation study on bed sediments of lake nainital, uttaranchal, india.
24749377 - Mercury content in low cost skin lightening cream products.
21713387 - Comparison of nitrofen uptake via water and food and its distribution in tissue of comm...
17520767 - Medical devices; obstetrical and gynecological devices; classification of computerized ...
Publication Detail:
Type:  Journal Article     Date:  2012-10-08
Journal Detail:
Title:  Frontiers in psychology     Volume:  3     ISSN:  1664-1078     ISO Abbreviation:  Front Psychol     Publication Date:  2012  
Date Detail:
Created Date:  2012-10-12     Completed Date:  2012-10-15     Revised Date:  2013-08-13    
Medline Journal Info:
Nlm Unique ID:  101550902     Medline TA:  Front Psychol     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  387     Citation Subset:  -    
Multisensory Cognition Lab, Department of Psychology, Utah State University Logan, UT, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

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

Previous Document:  Beyond feature binding: interference from episodic context binding creates the bivalency effect in t...
Next Document:  Mine is Earlier than Yours: Causal Beliefs Influence the Perceived Time of Action Effects.