| Records |
Author  |
Beran, M.J.; Beran, M.M.; Harris, E.H.; Washburn, D.A. |
| Title |
Ordinal judgments and summation of nonvisible sets of food items by two chimpanzees and a rhesus macaque |
Type |
Journal Article |
| Year |
2005 |
Publication |
Journal of Experimental Psychology. Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
| Volume |
31 |
Issue |
3 |
Pages |
351-362 |
| Keywords |
Animals; Behavior, Animal; Chi-Square Distribution; Cognition; Color Perception/physiology; Female; *Food; Judgment/*physiology; Macaca mulatta; Male; Pan troglodytes; Serial Learning/*physiology; Size Perception |
| Abstract |
Two chimpanzees and a rhesus macaque rapidly learned the ordinal relations between 5 colors of containers (plastic eggs) when all containers of a given color contained a specific number of identical food items. All 3 animals also performed at high levels when comparing sets of containers with sets of visible food items. This indicates that the animals learned the approximate quantity of food items in containers of a given color. However, all animals failed in a summation task, in which a single container was compared with a set of 2 containers of a lesser individual quantity but a greater combined quantity. This difficulty was not overcome by sequential presentation of containers into opaque receptacles, but performance improved if the quantitative difference between sizes was very large. |
| Address |
Language Research Center, Georgia State University, Decatur, 30034, USA. mjberan@yahoo.com |
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Place of Publication |
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| Language |
English |
Summary Language |
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Original Title |
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Edition |
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| ISSN |
0097-7403 |
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| Notes |
PMID:16045389 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2766 |
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| Author |
Shettleworth, S.J. |
| Title |
Memory and hippocampal specialization in food-storing birds: challenges for research on comparative cognition |
Type |
Journal Article |
| Year |
2003 |
Publication |
Brain, behavior and evolution |
Abbreviated Journal |
Brain Behav Evol |
| Volume |
62 |
Issue |
2 |
Pages |
108-116 |
| Keywords |
Animals; Birds/*physiology; Cognition/*physiology; Color Perception/physiology; Feeding Behavior/*physiology; Hippocampus/*physiology; Memory/*physiology; Species Specificity |
| Abstract |
The three-way association among food-storing behavior, spatial memory, and hippocampal enlargement in some species of birds is widely cited as an example of a new 'cognitive ecology' or 'neuroecology.' Whether this relationship is as strong as it first appears and whether it might be evidence for an adaptive specialization of memory and hippocampus in food-storers have recently been the subject of some controversy [Bolhuis and Macphail, 2001; Macphail and Bolhuis, 2001]. These critiques are based on misconceptions about the nature of adaptive specializations in cognition, misconceptions about the uniformity of results to be expected from applying the comparative method to data from a wide range of species, and a narrow view of what kinds of cognitive adaptations are theoretically interesting. New analyses of why food-storers (black-capped chickadees, Poecile Atricapilla) respond preferentially to spatial over color cues when both are relevant in a memory task show that this reflects a relative superiority of spatial memory as compared to memory for color rather than exceptional spatial attention or spatial discrimination ability. New studies of chickadees from more or less harsh winter climates also support the adaptive specialization hypothesis and suggest that within-species comparisons may be especially valuable for unraveling details of the relationships among ecology, memory, and brain in food-storing species. |
| Address |
Department of Psychology, University of Toronto, Toronto, Ont., M5S 3G3, Canada. shettle@psych.utoronto.ca |
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Editor |
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| Language |
English |
Summary Language |
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Original Title |
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Edition |
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| ISSN |
0006-8977 |
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| Notes |
PMID:12937349 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
367 |
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