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Author |
Straub, A. |
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Title |
An intelligent crow beats a lab |
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Journal Article |
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Year |
2007 |
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Science (New York, N.Y.) |
Abbreviated Journal |
Science |
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316 |
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5825 |
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688 |
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Animals; *Behavior, Animal; *Cognition; *Crows; Dogs; Intelligence; Memory |
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1095-9203 |
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PMID:17478698 |
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Equine Behaviour @ team @ |
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4102 |
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Author |
Morell, V. |
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Title |
Nicola Clayton profile. Nicky and the jays |
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2007 |
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Science (New York, N.Y.) |
Abbreviated Journal |
Science |
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Volume |
315 |
Issue |
5815 |
Pages |
1074-1075 |
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Animals; *Behavior, Animal; *Cognition; England; History, 20th Century; History, 21st Century; Intelligence; Memory; Passeriformes/*physiology; Portraits |
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PMID:17322042 |
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Equine Behaviour @ team @ |
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2833 |
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Author |
Pennisi, E. |
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Title |
Animal cognition. Man's best friend(s) reveal the possible roots of social intelligence |
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2006 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
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Volume |
312 |
Issue |
5781 |
Pages |
1737 |
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Animals; *Cognition; Comprehension; Cooperative Behavior; Cues; Dogs/*psychology; *Evolution; *Intelligence; *Social Behavior |
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1095-9203 |
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PMID:16794056 |
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Equine Behaviour @ team @ |
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2835 |
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Author |
Pennisi, E. |
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Title |
Animal cognition. Social animals prove their smarts |
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2006 |
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Science (New York, N.Y.) |
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Science |
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312 |
Issue |
5781 |
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1734-1738 |
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Animals; *Behavior, Animal; *Birds; *Cognition; Comprehension; Cues; Food; Hominidae/*psychology; *Intelligence; Learning; Memory; *Social Behavior |
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1095-9203 |
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PMID:16794055 |
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Equine Behaviour @ team @ |
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2836 |
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Author |
Seyfarth, R.M.; Cheney, D.L. |
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Title |
What are big brains for? |
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Journal Article |
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Year |
2002 |
Publication |
Proceedings of the National Academy of Sciences of the United States of America |
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Proc. Natl. Acad. Sci. U.S.A. |
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Volume |
99 |
Issue |
7 |
Pages |
4141-4142 |
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Animals; Brain/*anatomy & histology; *Intelligence; Learning; Primates/*anatomy & histology/*psychology; Social Behavior |
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Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA. seyfarth@psych.upenn.edu |
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0027-8424 |
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PMID:11929989 |
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Call Number |
refbase @ user @ |
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692 |
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Author |
Gould, J.L. |
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Title |
Animal cognition |
Type |
Journal Article |
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Year |
2004 |
Publication |
Current Biology : CB |
Abbreviated Journal |
Curr Biol |
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Volume |
14 |
Issue |
10 |
Pages |
R372-5 |
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Keywords |
Animals; Awareness; Behavior, Animal/*physiology; Cognition/*physiology; Concept Formation; Decision Making; Instinct; Intelligence/*physiology; Learning/*physiology; Species Specificity |
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Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08544, USA. gould@princeton.edu |
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0960-9822 |
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PMID:15186759 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4169 |
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Author |
Hunt, G.R.; Rutledge, R.B.; Gray, R.D. |
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Title |
The right tool for the job: what strategies do wild New Caledonian crows use? |
Type |
Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
Issue |
4 |
Pages |
307-316 |
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Keywords |
Analysis of Variance; Animals; Comprehension; *Crows; Female; *Intelligence; Male; *Problem Solving; *Tool Use Behavior |
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Abstract |
New Caledonian crows Corvus moneduloides (NC crows) display sophisticated tool manufacture in the wild, but the cognitive strategy underlying these skills is poorly understood. Here, we investigate what strategy two free-living NC crows used in response to a tool-length task. The crows manufactured tools to extract food from vertical holes of different depths. The first tools they made in visits were of a similar length regardless of the hole depth. The typical length was usually too short to extract food from the deep holes, which ruled out a strategy of immediate causal inference on the first attempt in a trial. When the first tool failed, the crows made second tools significantly longer than the unsuccessful first tools. There was no evidence that the crows made the lengths of first tools to directly match hole depth. We argue that NC crows may generally use a two-stage heuristic strategy to solve tool problems and that performance on the first attempt in a trial is not necessarily the 'gold standard' for assessing folk physics. |
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Address |
Department of Psychology, University of Auckland, Private Bag 92019, Auckland, New Zealand. grhunt10@hotmail.com |
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1435-9448 |
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PMID:16941156 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2442 |
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Author |
Mulcahy, N.J.; Call, J. |
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Title |
How great apes perform on a modified trap-tube task |
Type |
Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
Issue |
3 |
Pages |
193-199 |
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Keywords |
Animals; *Discrimination Learning; Female; Gorilla gorilla; Hominidae/*psychology; *Intelligence; Male; *Motor Skills; Pan paniscus; Pan troglodytes; Pongo pygmaeus; *Problem Solving; Species Specificity |
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Abstract |
To date, neither primates nor birds have shown clear evidence of causal knowledge when attempting to solve the trap tube task. One factor that may have contributed to mask the knowledge that subjects may have about the task is that subjects were only allowed to push the reward away from them, which is a particularly difficult action for primates in certain problem solving situations. We presented five orangutans (Pongo pygmaeus), two chimpanzees (Pan troglodytes), two bonobos (Pan paniscus), and one gorilla (Gorilla gorilla) with a modified trap tube that allowed subjects to push or rake the reward with the tool. In two additional follow-up tests, we inverted the tube 180 degrees rendering the trap nonfunctional and also presented subjects with the original task in which they were required to push the reward out of the tube. Results showed that all but one of the subjects preferred to rake the reward. Two orangutans and one chimpanzee (all of whom preferred to rake the reward), consistently avoided the trap only when it was functional but failed the original task. These findings suggest that some great apes may have some causal knowledge about the trap-tube task. Their success, however, depended on whether they were allowed to choose certain tool-using actions. |
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Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany. mulcahy@eva.mpg.de |
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1435-9448 |
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PMID:16612632 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2469 |
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Author |
Santos, L.R.; Pearson, H.M.; Spaepen, G.M.; Tsao, F.; Hauser, M.D. |
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Title |
Probing the limits of tool competence: experiments with two non-tool-using species (Cercopithecus aethiops and Saguinus oedipus) |
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Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
Issue |
2 |
Pages |
94-109 |
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Animals; *Association Learning; Cercopithecus aethiops; *Cognition; Female; *Intelligence; Male; *Motor Skills; *Problem Solving; Saguinus; Species Specificity |
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Abstract |
Non-human animals vary in their ability to make and use tools. The goal of the present study was to further explore what, if anything, differs between tool-users and non-tool-users, and whether these differences lie in the conceptual or motor domain. We tested two species that typically do not use tools-cotton top tamarins (Saguinus oedipus) and vervet monkeys (Cercopithecus aethiops)-on problems that mirrored those designed for prolific tool users such as chimpanzees. We trained subjects on a task in which they could choose one of two canes to obtain an out-of-reach food reward. After training, subjects received several variations on the original task, each designed to examine a specific conceptual aspect of the pulling problem previously studied in other tool-using species. Both species recognized that effective pulling tools must be made of rigid materials. Subsequent conditions revealed significant species differences, with vervets outperforming tamarins across many conditions. Vervets, but not tamarins, had some recognition of the relationship between a tool's orientation and the position of the food reward, the relationship between a tool's trajectory and the substance that it moves on, and that tools must be connected in order to work properly. These results provide further evidence that tool-use may derive from domain-general, rather than domain-specific cognitive capacities that evolved for tool use per se. |
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Department of Psychology, Yale University, Box 208205, New Haven, CT, USA. laurie.santos@yale.edu |
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1435-9448 |
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PMID:16341524 |
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Equine Behaviour @ team @ |
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2478 |
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Author |
Ducoing, A.M.; Thierry, B. |
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Title |
Tool-use learning in Tonkean macaques (Macaca tonkeana) |
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Journal Article |
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Year |
2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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8 |
Issue |
2 |
Pages |
103-113 |
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Animals; *Association Learning; *Behavior, Animal; Cognition; Imitative Behavior; *Intelligence; Macaca/*psychology; Male; *Motor Skills |
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Abstract |
The transmission of tool use is a rare event in monkeys. Such an event arose in a group of semi-free-ranging Tonkean macaques (Macaca tonkeana) in which leaning a pole against the park's fence (branch leaning) appeared and spread to several males. This prompted us to test individual and social learning of this behavior in seven young males. In the first experiment, three males learned individually to obtain a food reward using a wooden pole as a climbing tool. They began using the pole to retrieve the reward only when they could alternatively experience acting on the object and reaching the target. In a second experiment, we first tested whether four other subjects could learn branch leaning after having observed a group-mate performing the task. Despite repeated opportunities to observe the demonstrator, they did not learn to use the pole as a tool. Hence we exposed the latter subjects to individual learning trials and they succeeded in the task. Tool use was not transmitted in the experimental situation, which contrasts with observations in the park. We can conclude that the subjects were not able to recognize the target as such. It is possible that they recognized it and learned the task individually when we alternated the opportunity to act upon the object and to reach the reward. This suggests that these macaques could then have associated the action they exercised upon the pole and the use of the pole as a means to reach the reward. |
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Centre d'Ecologie et Physiologie Energetiques, Centre National de la Recherche Scientifique, 7 rue de l'Universite, 67000, Strasbourg, France |
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1435-9448 |
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PMID:15449102 |
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Equine Behaviour @ team @ |
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2508 |
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