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Author |
Itakura, S.; Agnetta, B.; Hare, B.; Tomasello, M. |
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Title |
Chimpanzee Use of Human and Conspecific Social Cues to Locate Hidden Food |
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Journal Article |
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Year |
2001 |
Publication |
Developmental Science |
Abbreviated Journal |
Dev Sci |
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Volume |
2 |
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2 |
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448 - 456 |
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Two studies are reported in which chimpanzees attempted to use social cues to locate hidden food in one of two possible hiding places. In the first study four chimpanzees were exposed to a local enhancement cue (the informant approached and looked to the location where food was hidden and then remained beside it) and a gaze/point cue (the informant gazed and manually pointed towards the location where the food was hidden). Each cue was given by both a human informant and a chimpanzee informant. In the second study 12 chimpanzees were exposed to a gaze direction cue in combination with a vocal cue (the human informant gazed to the hiding location and produced one of two different vocalizations – a 'food-bark' or a human word-form). The results were – (i) all subjects were quite skillful with the local enhancement cue, no matter who produced it; (ii) few subjects were skillful with the gaze/point cue, no matter who produced it (most of these being individuals who had been raised in infancy by humans); and (iii) most subjects were skillful when the human gazed and vocalized at the hiding place, with little difference between the two types of vocal cue. Findings are discussed in terms of chimpanzees' apparent need for additional cues, over and above gaze direction cues, to indicate the presence of food. |
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Department of Psychology and Yerkes Regional Primate Research Center, Emory University, USA DOI – 10.1111/1467-7687.00089 |
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Blackwell Publishers Ltd. 1999 |
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Equine Behaviour @ team @ |
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4973 |
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Author |
Tomasello, M. |
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Title |
Cultural transmission in the tool use and communicatory signalling of chimpanzees? |
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Year |
1990 |
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Language and Intelligence in Monkeys and Apes. |
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274-311 |
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Cambridge University Press |
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Cambridge |
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Parker,S.T.;Gibson,K.R. |
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Equine Behaviour @ team @ |
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5267 |
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Mersmann, D.; Tomasello, M.; Call, J.; Kaminski, J.; Taborsky, M. |
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Title |
Simple Mechanisms Can Explain Social Learning in Domestic Dogs (Canis familiaris) |
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Journal Article |
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Year |
2011 |
Publication |
Ethology |
Abbreviated Journal |
Ethology |
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117 |
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8 |
Pages |
675-690 |
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Abstract Recent studies have suggested that domestic dogs (Canis familiaris) engage in highly complex forms of social learning. Here, we critically assess the potential mechanisms underlying social learning in dogs using two problem-solving tasks. In a classical detour task, the test dogs benefited from observing a demonstrator walking around a fence to obtain a reward. However, even inexperienced dogs did not show a preference for passing the fence at the same end as the demonstrator. Furthermore, dogs did not need to observe a complete demonstration by a human demonstrator to pass the task. Instead, they were just as successful in solving the problem after seeing a partial demonstration by an object passing by at the end of the fence. In contrast to earlier findings, our results suggest that stimulus enhancement (or affordance learning) might be a powerful social learning mechanism used by dogs to solve such detour problems. In the second task, we examined whether naïve dogs copy actions to solve an instrumental problem. After controlling for stimulus enhancement and other forms of social influence (e.g. social facilitation and observational conditioning), we found that dogs’ problem solving was not influenced by witnessing a skilful demonstrator (either an unknown human, a conspecific or the dog’s owner). Together, these results add to evidence suggesting that social learning may often be explained by relatively simple (but powerful) mechanisms. |
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Blackwell Publishing Ltd |
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1439-0310 |
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Equine Behaviour @ team @ |
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5409 |
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Author |
Tomasello, M.; Call, J |
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Books Received |
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Journal Article |
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2001 |
Publication |
Animal Behaviour |
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61 |
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1 |
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269-270 |
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The Alex Studies: Cognitive and Communicative Abilities of Grey
Parrots. By I. M. PEPPERBERG. Cambridge, Massachusetts:
Harvard University Press (1999). |
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0003-3472 |
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Equine Behaviour @ team @ |
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5446 |
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Author |
Tomasello, M. |
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Title |
The cultural origins of human cognition. |
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Book Whole |
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1999 |
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Harvard University Press |
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Camebridge,MA. |
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Equine Behaviour @ team @ |
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5597 |
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Author |
Tomasello, M. |
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Title |
Do apes ape? |
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Book Chapter |
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Year |
1996 |
Publication |
Social learning in animals: the roots of culture |
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319-346 |
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Academic Press |
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London |
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Heyes, C. M.; Galef, B.G. |
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Equine Behaviour @ team @ |
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5600 |
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Author |
Warneken, F.; Tomasello, M. |
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Title |
Altruistic Helping in Human Infants and Young Chimpanzees |
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Journal Article |
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Year |
2006 |
Publication |
Science |
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311 |
Issue |
5765 |
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1301-1303 |
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Human beings routinely help others to achieve their goals, even when the helper receives no immediate benefit and the person helped is a stranger. Such altruistic behaviors (toward non-kin) are extremely rare evolutionarily, with some theorists even proposing that they are uniquely human. Here we show that human children as young as 18 months of age (prelinguistic or just-linguistic) quite readily help others to achieve their goals in a variety of different situations. This requires both an understanding of others' goals and an altruistic motivation to help. In addition, we demonstrate similar though less robust skills and motivations in three young chimpanzees. |
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Equine Behaviour @ team @ |
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5607 |
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Author |
Warneken, F.; Tomasello, M. |
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Title |
Varieties of altruism in children and chimpanzees |
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2009 |
Publication |
Trends in cognitive sciences |
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Trends Cogn Sci |
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13 |
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9 |
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397-402 |
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Recent empirical research has shed new light on the perennial question of human altruism. A number of recent studies suggest that from very early in ontogeny young children have a biological predisposition to help others achieve their goals, to share resources with others and to inform others of things helpfully. Humans nearest primate relatives, such as chimpanzees, engage in some but not all of these behaviors: they help others instrumentally, but they are not so inclined to share resources altruistically and they do not inform others of things helpfully. The evolutionary roots of human altruism thus appear to be much more complex than previously supposed. |
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Elsevier Science, |
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1364-6613 |
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Equine Behaviour @ team @ S1364-6613(09)00149-1 DOI - 10.1016/j.tics.2009.06.008 |
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5608 |
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Author |
Warneken, F.; Hare, B.; Melis, A.P.; Hanus, D.; Tomasello, M. |
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Title |
Spontaneous Altruism by Chimpanzees and Young Children |
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Journal Article |
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2007 |
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PLoS Biol |
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PLoS Biol |
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5 |
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7 |
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e184 EP - |
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<p>Experimental evidence reveals that chimpanzees will help other unrelated humans and conspecifics without a reward, showing that they share crucial aspects of altruism with humans.</p> |
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Public Library of Science |
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Equine Behaviour @ team @ |
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5609 |
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Author |
Schneider, A.-C.; Melis, A.P.; Tomasello, M. |
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Title |
How chimpanzees solve collective action problems |
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2012 |
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Proceedings of the Royal Society B: Biological Sciences |
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We presented small groups of chimpanzees with two collective action situations, in which action was necessary for reward but there was a disincentive for individuals to act owing to the possibility of free-riding on the efforts of others. We found that in simpler scenarios (experiment 1) in which group size was small, there was a positive relationship between rank and action with more dominant individuals volunteering to act more often, particularly when the reward was less dispersed. Social tolerance also seemed to mediate action whereby higher tolerance levels within a group resulted in individuals of lower ranks sometimes acting and appropriating more of the reward. In more complex scenarios, when group size was larger and cooperation was necessary (experiment 2), overcoming the problem was more challenging. There was highly significant variability in the action rates of different individuals as well as between dyads, suggesting success was more greatly influenced by the individual personalities and personal relationships present in the group. |
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Equine Behaviour @ team @ |
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5629 |
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