| Records |
Author  |
Byrne, R.W. |
| Title |
How monkeys find their way: leadership, coordination, and cognitive maps of African baboons. |
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Book Chapter |
| Year |
2000 |
Publication |
On the Move: How and Why Animals Travel in Groups |
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Pages |
491–518 |
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Chicago University Press |
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Chicago |
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Boinski, S.; Garber, P.A. |
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Equine Behaviour @ team @ |
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5146 |
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| Author |
Byrne, R.W. |
| Title |
Imitation without intentionality. Using string parsing to copy the organization of behaviour |
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Journal Article |
| Year |
1999 |
Publication |
Animal Cognition |
Abbreviated Journal |
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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Equine Behaviour @ team @ |
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3162 |
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Byrne, R.W.; Corp, N.; Byrne, J.M. |
| Title |
Manual dexterity in the gorilla: bimanual and digit role differentiation in a natural task |
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Journal Article |
| Year |
2001 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
4 |
Issue |
3 |
Pages |
347-361 |
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| Abstract |
The manipulative actions of mountain gorillas Gorilla g. beringei were examined in the context of foraging on hard-to-process plant foods in the field, in particular those used in tackling thistle Carduus nyassanus. A repertoire of 72 functionally distinct manipulative actions was recorded. Many of these actions were used in several variants of grip, finger(s) and movement path, both by different individuals and by the same individual at different times. The repertoire appears somewhat greater than that observed in comparable studies of monkeys, but a far more striking difference is found in the use of differentiated actions in concert. Mountain gorillas routinely and frequently deal with problems that involve: (1) bimanual role differentiation, with the two hands taking different roles but synchronized in time and space, and (2) digit role differentiation, with independent control of parts of the same hand used for separate purposes at the same time. The independent control that allows these abilities, so crucial to human manual constructional ability, is apparently general in African great apes. Role differentiation, between and within the hand, is evidently a primitive characteristic in the human arsenal of skills. |
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Equine Behaviour @ team @ |
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3357 |
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Byrnl, R.W.; Tomasello, M. |
| Title |
Do rats ape? |
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Journal Article |
| Year |
1995 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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50 |
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5 |
Pages |
1417-1420 |
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refbase @ user @ |
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589 |
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| Author |
Bökönyi, S. |
| Title |
Horse |
Type |
Book Chapter |
| Year |
1984 |
Publication |
Evolution of domesticated animals |
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18 |
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162-173 |
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John Wiley & Sons |
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Hoboken, NJ |
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Manson |
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Product Details * Hardcover * Publisher: John Wiley & Sons (May 1986) * ISBN-10: 047020 |
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from Professor Hans Klingels Equine Reference List |
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no |
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949 |
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Caanitz, H.; O'Leary, L.; Houpt, K.; Petersson, K.; Hintz, H. |
| Title |
Effect of exercise on equine behavior |
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Journal Article |
| Year |
1991 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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31 |
Issue |
1-2 |
Pages |
1-12 |
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The effect of short periods of strenuous exertion, in this case treadmill exercise, on the subsequent behavior of Standardbred horses was examined. Six horses were exercised on a high-speed treadmill 4 or 5 days per week, for 3-4 miles (approximately 1.8 m s-1 for 3 min, 5 m s-1 for 12 min, 9 m s-1 for 3 min, 3 m s-1 for 3 min, 1.8 m s-1 for 3 min). The behavior of the horses was observed in the horse's home stall immediately after exercise and 2-7 h after exercise. Focal animal sampling for a total of 150 h revealed that the horses spent significantly more time drinking and less time resting after exercise than they did on control (non-exercise or rest days). The greatest influence on behavior was seen immediately after exercise. The horses spent 13.2+/-2.7 s per 15 min drinking after exercise and 7.2+/-2.3 s per 15 min drinking on non-exercise days. They spent 7.3+/-1.5 min h-1 stand resting after exercise and 9.7+/-2.1 min h-1 on non-exercise days. These changes in behavior may be related to the physiological changes that accompany exercise. Eating, walking, elimination and self-grooming were not significantly influenced by exercise. In a second experiment the activities of two groups of six Standardbred mares were compared. One group was exercised on the treadmill and the other was not. The exercised horses spent more time drinking and lying, but urinated less than the non-exercised group. |
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refbase @ user @ |
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1989 |
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| Author |
Caldwell, C.A.; Whiten, A. |
| Title |
Testing for social learning and imitation in common marmosets, Callithrix jacchus, using an artificial fruit |
Type |
Journal Article |
| Year |
2004 |
Publication |
Animal cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
7 |
Issue |
2 |
Pages |
77-85 |
| Keywords |
Animals; *Association Learning; Callithrix/*psychology; Discrimination Learning; *Feeding Behavior; Female; Food Preferences; Fruit; *Imitative Behavior; Male; *Social Behavior; Social Environment |
| Abstract |
We tested for social learning and imitation in common marmosets using an artificial foraging task and trained conspecific demonstrators. We trained a demonstrator marmoset to open an artificial fruit, providing a full demonstration of the task to be learned. Another marmoset provided a partial demonstration, controlling for stimulus enhancement effects, by eating food from the outside of the apparatus. We thus compared three observer groups, each consisting of four animals: those that received the full demonstration, those that received the partial demonstration, and a control group that saw no demonstration prior to testing. Although none of the observer marmosets succeeded in opening the artificial fruit during the test periods, there were clear effects of demonstration type. Those that saw the full demonstration manipulated the apparatus more overall, whereas those from the control group manipulated it the least of the three groups. Those from the full-demonstration group also contacted the particular parts of the artificial fruit that they had seen touched (localised stimulus enhancement) to a greater extent than the other two groups. There was also an interaction between the number of hand and mouth touches made to the artificial fruit for the full- and partial-demonstration groups. Whether or not these data represent evidence for imitation is discussed. We also propose that the clear differences between the groups suggest that social learning mechanisms provide real benefits to these animals in terms of developing novel food-processing skills analogous to the one presented here. |
| Address |
Centre for Social Learning and Cognitive Evolution and Scottish Primate Research Group, University of St Andrews, KY16 9JU, St Andrews, Fife, Scotland. C.A.Caldwell@exeter.ac.uk |
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1435-9448 |
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| Notes |
PMID:15069606 |
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no |
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refbase @ user @ |
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735 |
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| Author |
Caldwell, C.A.; Whiten, A. |
| Title |
Evolutionary perspectives on imitation: is a comparative psychology of social learning possible? |
Type |
Journal Article |
| Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
5 |
Issue |
4 |
Pages |
193-208 |
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Animals; *Behavior, Animal; Evolution; Humans; *Imitative Behavior; Learning; Models, Animal |
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Studies of imitation in animals have become numerous in recent times, but do they contribute to a comparative psychology of social learning? We review this burgeoning field to identify the problems and prospects for such a goal. Difficulties of two main kinds are identified. First, researchers have tackled questions about social learning from at least three very different theoretical perspectives, the “phylogenetic”, “animal model”, and “adaptational”. We examine the conflicts between them and consider the scope for integration. A second difficulty arises in the methodological approaches used in the discipline. In relation to one of these – survey reviews of published studies – we tabulate and compare the contrasting conclusions of nine articles that together review 36 studies. The basis for authors' disagreements, including the matters of perceptual opacity, novelty, sequential structure, and goal representation, are examined. In relation to the other key method, comparative experimentation, we identify 12 studies that have explicitly compared species' imitative ability on similar tasks. We examine the principal problems of comparing like with like in these studies and consider solutions, the most powerful of which we propose to be the use of a systematic range of task designs, rather than any single “gold standard” task. |
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School of Psychology, Washington Singer Laboratories, University of Exeter, Exeter EX4 4QG, UK. C.A.Caldwell@exeter.ac.uk |
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1435-9448 |
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PMID:12461597 |
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no |
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Equine Behaviour @ team @ |
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2593 |
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| Author |
Call, J. |
| Title |
Inferences by exclusion in the great apes: the effect of age and species |
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Journal Article |
| Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
9 |
Issue |
4 |
Pages |
393-403 |
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Age Factors; Animals; Association Learning; *Cognition; *Concept Formation; *Discrimination Learning; Female; Gorilla gorilla; Hominidae/classification/*psychology; Male; Pan paniscus; Pan troglodytes; Pongo pygmaeus; *Problem Solving; Species Specificity |
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This study investigated the ability of chimpanzees, gorillas, orangutans, and bonobos to make inferences by exclusion using the procedure pioneered by Premack and Premack (Cognition 50:347-362, 1994) with chimpanzees. Thirty apes were presented with two different food items (banana vs. grape) on a platform and covered with identical containers. One of the items was removed from the container and placed between the two containers so that subjects could see it. After discarding this item, subjects could select between the two containers. In Experiment 1, apes preferentially selected the container that held the item that the experimenter had not discarded, especially if subjects saw the experimenter remove the item from the container (but without seeing the container empty). Experiment 3 in which the food was removed from one of the containers behind a barrier confirmed these results. In contrast, subjects performed at chance levels when a stimulus (colored plastic chip: Exp. 1; food item: Exp. 2 and Exp. 3) designated the item that had been removed. These results indicated that apes made inferences, not just learned to use a discriminative cue to avoid the empty container. Apes perceived and treated the item discarded by the experimenter as if it were the very one that had been hidden under the container. Results suggested a positive relationship between age and inferential ability independent of memory ability but no species differences. |
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Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany. call@eva.mpg.de |
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1435-9448 |
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PMID:16924458 |
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no |
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Equine Behaviour @ team @ |
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2444 |
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| Author |
Call, J. |
| Title |
A fish-eye lens for comparative studies: broadening the scope of animal cognition |
Type |
Journal Article |
| Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
5 |
Issue |
1 |
Pages |
15-16 |
| Keywords |
Animals; Behavior, Animal/physiology; Cognition/*physiology; Fishes/*physiology; Species Specificity |
| Abstract |
? is the article no longer available? |
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call@eva.mpg.de |
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1435-9448 |
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PMID:11957396 |
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Equine Behaviour @ team @ |
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2616 |
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