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Author Byrne, R. W.; Russon, A. E. doi  openurl
  Title Learning by imitation: a hierachical approach Type Journal Article
  Year 1998 Publication Abbreviated Journal (down) Behav. Brain Sci.  
  Volume 21 Issue Pages 667-721  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5598  
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Author Whiten, A.; Byrne, R.W. url  doi
openurl 
  Title Tactical deception in primates Type Journal Article
  Year 1988 Publication Behavioral and Brain Sciences Abbreviated Journal (down) Behav. Brain Sci.  
  Volume 11 Issue 02 Pages 233-244  
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  Abstract ABSTRACT Tactical deception occurs when an individual is able to use an “honest” act from his normal repertoire in a different context to mislead familiar individuals. Although primates have a reputation for social skill, most primate groups are so intimate that any deception is likely to be subtle and infrequent. Published records are sparse and often anecdotal. We have solicited new records from many primatologists and searched for repeating patterns. This has revealed several different forms of deceptive tactic, which we classify in terms of the function they perform. For each class, we sketch the features of another individual's state of mind that an individual acting with deceptive intent must be able to represent, thus acting as a “natural psychologist.” Our analysis will sharpen attention to apparent taxonomic differences. Before these findings can be generalized, however, behavioral scientists must agree on some fundamental methodological and theoretical questions in the study of the evolution of social cognition.  
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  Publisher Cambridge Journals Online Place of Publication Editor  
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  Series Volume Series Issue Edition  
  ISSN 1469-1825 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5937  
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Author Byrne, R.W. doi  openurl
  Title Do larger brains mean greater intelligence? Type Journal Article
  Year 1993 Publication Behavioral and Brain Sciences Abbreviated Journal (down) Behav. Brain Sci.  
  Volume 16 Issue 4 Pages 696-697  
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  Publisher Cambridge University Press Place of Publication Editor  
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  ISSN 1469-1825 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 6171  
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Author Krueger, K.; Trager, L.; Farmer, K.; Byrne, R. doi  openurl
  Title Tool Use in Horses Type Journal Article
  Year 2022 Publication Animals Abbreviated Journal (down) Animals  
  Volume 12 Issue 15 Pages 1876  
  Keywords crowdsourcing; horse; innovation; mule; management; tool use  
  Abstract Tool use has not yet been confirmed in horses, mules or donkeys. As this subject is difficult to research with conventional methods, we used a crowdsourcing approach to gather data. We contacted equid owners and carers and asked them to report and video examples of â��unusualâ�� behaviour via a dedicated website. We also searched YouTube and Facebook for videos of equids showing tool use. From 635 reports, including 1014 behaviours, we found 20 cases of tool use, 13 of which were unambiguous in that it was clear that the behaviour was not trained, caused by reduced welfare, incidental or accidental. We then assessed (a) the effect of management conditions on tool use and (b) whether the animals used tools alone, or socially, involving other equids or humans. We found that management restrictions were associated with corresponding tool use in 12 of the 13 cases (p = 0.01), e.g., equids using sticks to scrape hay within reach when feed was restricted. Furthermore, 8 of the 13 cases involved other equids or humans, such as horses using brushes to groom others. The most frequent tool use was for foraging, with seven examples, tool use for social purposes was seen in four cases, and there was just one case of tool use for escape. There was just one case of tool use for comfort, and in this instance, there were no management restrictions. Equids therefore can develop tool use, especially when management conditions are restricted, but it is a rare occurrence.  
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  Series Editor Series Title Abbreviated Series Title Animals  
  Series Volume 12 Series Issue 15 Edition  
  ISSN 2076-2615 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 6695  
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Author Cochet, H.; Byrne, R.W. url  doi
openurl 
  Title Evolutionary origins of human handedness: evaluating contrasting hypotheses Type Journal Article
  Year 2013 Publication Abbreviated Journal (down) Animal Cognition  
  Volume 16 Issue 4 Pages 531-542  
  Keywords Hand preference; Hemispheric specialization; Communicative gestures; Evolution of language; Nonhuman primates; Human children  
  Abstract Variation in methods and measures, resulting in past dispute over the existence of population handedness in nonhuman great apes, has impeded progress into the origins of human right-handedness and how it relates to the human hallmark of language. Pooling evidence from behavioral studies, neuroimaging and neuroanatomy, we evaluate data on manual and cerebral laterality in humans and other apes engaged in a range of manipulative tasks and in gestural communication. A simplistic human/animal partition is no longer tenable, and we review four (nonexclusive) possible drivers for the origin of population-level right-handedness: skilled manipulative activity, as in tool use; communicative gestures; organizational complexity of action, in particular hierarchical structure; and the role of intentionality in goal-directed action. Fully testing these hypotheses will require developmental and evolutionary evidence as well as modern neuroimaging data.  
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  Publisher Springer-Verlag Place of Publication Editor  
  Language English Summary Language Original Title  
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  ISSN 1435-9448 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5691  
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Author Topál, J.; Byrne, R.W.; Miklósi, Á.; Csányi, V. doi  openurl
  Title Reproducing human actions and action sequences: “Do as I Do!” in a dog Type Journal Article
  Year 2006 Publication Animal Cognition Abbreviated Journal (down) Anim. Cogn.  
  Volume 9 Issue 4 Pages 355-367  
  Keywords Animals; *Comprehension; Conditioning, Operant; *Discrimination Learning; Dogs/*psychology; Humans; *Imitative Behavior; Male; *Serial Learning  
  Abstract We present evidence that a dog (Philip, a 4-year-old tervueren) was able to use different human actions as samples against which to match his own behaviour. First, Philip was trained to repeat nine human-demonstrated actions on command ('Do it!'). When his performance was markedly over chance in response to demonstration by one person, testing with untrained action sequences and other demonstrators showed some ability to generalise his understanding of copying. In a second study, we presented Philip with a sequence of human actions, again using the 'Do as I do' paradigm. All demonstrated actions had basically the same structure: the owner picked up a bottle from one of six places; transferred it to one of the five other places and then commanded the dog ('Do it!'). We found that Philip duplicated the entire sequence of moving a specific object from one particular place to another more often than expected by chance. Although results point to significant limitations in his imitative abilities, it seems that the dog could have recognized the action sequence, on the basis of observation alone, in terms of the initial state, the means, and the goal. This suggests that dogs might acquire abilities by observation that enhance their success in complex socio-behavioural situations.  
  Address Comparative Ethology Research Group, Hungarian Academy of Sciences, Budapest, Pazmany, P. 1/c H-1117, Hungary. kea@t-online.hu  
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  ISSN 1435-9448 ISBN Medium  
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  Notes PMID:17024511 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2434  
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Author Held, S.; Baumgartner, J.; Kilbride, A.; Byrne, R.W.; Mendl, M. doi  openurl
  Title Foraging behaviour in domestic pigs (Sus scrofa): remembering and prioritizing food sites of different value Type Journal Article
  Year 2005 Publication Animal Cognition Abbreviated Journal (down) Anim. Cogn.  
  Volume 8 Issue 2 Pages 114-121  
  Keywords Animals; *Appetitive Behavior; *Association Learning; Feeding Behavior/*psychology; Female; *Space Perception; Sus scrofa/*psychology  
  Abstract This experiment investigated whether domestic pigs can remember the locations of food sites of different relative value, and how a restricted retrieval choice affects their foraging behaviour. Nine juvenile female pigs were trained to relocate two food sites out of a possible eight in a spatial memory task. The two baited sites contained different amounts of food and an obstacle was added to the smaller amount to increase handling time. On each trial, a pig searched for the two baited sites (search visit). Once it had found and eaten the bait, it returned for a second (relocation) visit, in which the two same sites were baited. Baited sites were changed between trials. All subjects learnt the task. When allowed to retrieve both baits, the subjects showed no preference for retrieving a particular one first (experiment 1). When they were allowed to retrieve only one bait, a significant overall preference for retrieving the larger amount emerged across subjects (experiment 2). To test whether this preference reflected an avoidance of the obstacle with the smaller bait, 15 choice-restricted control trials were conducted. In control trials obstacles were present with both baits. Pigs continued to retrieve the larger bait, indicating they had discriminated between the two food sites on the basis of quantity or profitability and adjusted their behaviour accordingly when the relocation choice was restricted. This suggests for the first time that domestic pigs have the ability to discriminate between food sites of different relative value and to remember their respective locations.  
  Address Department of Clinical Veterinary Science, Centre for Behavioural Biology, University of Bristol, Langford, BS40 5DU, UK. suzanne.held@bris.ac.uk  
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  Notes PMID:15871038 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2487  
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Author Byrne, R.W. doi  openurl
  Title Imitation without intentionality. Using string parsing to copy the organization of behaviour Type Journal Article
  Year 1999 Publication Animal Cognition Abbreviated Journal (down) Anim. Cogn.  
  Volume 2 Issue 2 Pages 63-72  
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  Abstract A theory of imitation is proposed, string parsing, which separates the copying of behavioural organization by observation from an understanding of the cause of its effectiveness. In string parsing, recurring patterns in the visible stream of behaviour are detected and used to build a statistical sketch of the underlying hierarchical structure. This statistical sketch may in turn aid the subsequent comprehension of cause and effect. Three cases of social learning of relatively complex skills are examined, as potential cases of imitation by string parsing. Understanding the basic requirements for successful string parsing helps to resolve the conflict between mainly negative reports of imitation in experiments and more positive evidence from natural conditions. Since string parsing does not depend on comprehension of the intentions of other agents or the everyday physics of objects, separate tests of these abilities are needed even in animals shown to learn by imitation.  
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  Call Number Equine Behaviour @ team @ Serial 3162  
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Author Byrne, R. doi  openurl
  Title When cognitive psychology met Japanese primatology Type Journal Article
  Year 2002 Publication Animal Cognition Abbreviated Journal (down) Anim. Cogn.  
  Volume 5 Issue 1 Pages 59-60  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3180  
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Author Stokes, E.; Byrne, R. doi  openurl
  Title Cognitive capacities for behavioural flexibility in wild chimpanzees (Pan troglodytes): the effect of snare injury on complex manual food processing Type Journal Article
  Year 2001 Publication Animal Cognition Abbreviated Journal (down) Anim. Cogn.  
  Volume 4 Issue 1 Pages 11-28  
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  Abstract In chimpanzees, it is only in the restricted context of tool use that manual and cognitive skills have been described, comparable to those that gorillas and orang-utans display in obtaining plant foods. We report the complex food preparation skills used to eat, without tools, the leaves of the tree Broussonettia papyrifera in the Sonso community of chimpanzees at Budongo Forest, Uganda. Able-bodied individuals used multi-stage techniques that required bimanual role differentiation at several stages, and were hierarchical in organisation. A total repertoire of 14 techniques was found, with strong preference in all individuals for either of two of these; 6 additional techniques were found when flowers and leaves were eaten together. However, in this community over 20% of individuals suffer from some form of upper- or lower-limb injury as a result of snares. We investigated the manner of compensation for upper-limb injury. Only the most severely injured showed reduced feeding efficiency. Injured individuals were found to use the same repertoire of techniques as able-bodied chimpanzees. We found no evidence to suggest that injured individuals were able to develop wholly novel techniques optimal for their specific injuries, although shifts in preference for particular techniques did occur. Rather, injured individuals used novel ways of achieving particular steps in the process; by “working around” their impairments; in this way, they managed to use the same techniques as the able-bodied. Since snare injuries generally befall young animals, these results suggest that chimpanzees learn techniques partly through observational learning (of, necessarily, able-bodied individuals).  
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  Call Number Equine Behaviour @ team @ Serial 3191  
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