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| Author | Templeton, J.J. | ||||
| Title | Learning from others' mistakes: a paradox revisited | Type | Journal Article | ||
| Year | 1998 | Publication | Animal Behaviour. | Abbreviated Journal | Anim. Behav. |
| Volume | 55 | Issue | 1 | Pages | 79-85 |
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| Abstract | Some researchers have reported the paradoxical finding of enhanced social learning when naive observers learn from unskilled rather than skilled demonstrators, particularly in discrimination tasks. In two experiments with starlings,Sturnus vulgaris, I considered whether this enhanced learning is because the observer (1) sees incorrect responses only, (2) sees both correct and incorrect responses or (3) sees an increase in the proportion of correct responses over trials. In experiment 1, individual starlings observed a demonstrator bird perform multiple simultaneous discrimination tasks. In one group, the demonstrator always picked the correct stimulus; in another group, the demonstrator always picked the incorrect stimulus; in a third group, the demonstrator consistently picked the correct stimulus 50% of the time. Those subjects that observed only incorrect choices performed significantly better than the other two groups, but none of the birds achieved the 90% correct performance criterion. Experiment 2 involved a single discrimination task; thus, a fourth group was added to control for individual learning. Again, subjects that observed only incorrect responses learned the discrimination significantly more quickly than the other three groups. Subjects that observed the demonstrator make both correct and incorrect responses were equally likely to select the same (correct) or opposite (incorrect) stimulus when the demonstrator picked the correct stimulus. When the demonstrator picked the incorrect stimulus, however, these subjects were significantly more likely to pick the opposite (correct) stimulus. These findings suggest that when learning a discrimination problem, observing a foraging companion's lack of success is more informative than observing its success. | ||||
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 567 | ||
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| Author | Tomasello, M.; Call, J.; Hare, B. | ||||
| Title | Five primate species follow the visual gaze of conspecifics | Type | Journal Article | ||
| Year | 1998 | Publication | Animal Behaviour. | Abbreviated Journal | Anim. Behav. |
| Volume | 55 | Issue | 4 | Pages | 1063-1069 |
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| Abstract | Individuals from five primate species were tested experimentally for their ability to follow the visual gaze of conspecifics to an outside object. Subjects were from captive social groups of chimpanzees,Pan troglodytes, sooty mangabeys,Cercocebus atys torquatus, rhesus macaques,Macaca mulatta, stumptail macaques,M. arctoides, and pigtail macaques,M. nemestrina. Experimental trials consisted of an experimenter inducing one individual to look at food being displayed, and then observing the reaction of another individual (the subject) that was looking at that individual (not the food). Control trials consisted of an experimenter displaying the food in an identical manner when the subject was alone. Individuals from all species reliably followed the gaze of conspecifics, looking to the food about 80% of the time in experimental trials, compared with about 20% of the time in control trials. Results are discussed in terms of both the proximate mechanisms that might be involved and the adaptive functions that might be served by gaze-following. | ||||
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 592 | ||
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| Author | Schnall, Simone; Gattis,Merideth | ||||
| Title | Transitive Inference by Visual Reasoning | Type | Conference Volume | ||
| Year | 1998 | Publication | Proceedings of the Twentieth Annual Conference of the Cognitive Science Society | Abbreviated Journal | |
| Volume | Issue | Pages | 929-934 | ||
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| Abstract | Two experiments are reported that investigated the influence of linear spatial organization on transitive inference performance. Reward/no-reward relations between overlapping pairs of elements were presented in a context of linear spatial order or random spatial order. Participants in the linear arrangement condition showed evidence for visual reasoning: They systematically mapped spatial relations to conceptual relation and used the spatial relations to make inferences on a reasoning task in a new spatial context. We suggest that linear ordering may be a “good figure”, by constituting a parsimonious representation for the integration of premises, as well as for the inferencing process. The late emergence of transitive inference in children may be the result of limited cognitive capacity, which --unless an external spatial array is available --constrains the construction of an internal spatial array. |
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 610 | ||
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| Author | Drummond, H.; Canales, C. | ||||
| Title | Dominance between booby nestlings involves winner and loser effects | Type | Journal Article | ||
| Year | 1998 | Publication | Animal Behaviour. | Abbreviated Journal | Anim. Behav. |
| Volume | 55 | Issue | 6 | Pages | 1669-1676 |
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| Abstract | Two-chick broods of the blue-footed booby,Sula nebouxii, ordinarily exhibit stable dominance-subordinance, with the senior (first-hatched) chick habitually aggressive and the junior one habitually submissive (Nelson 1978,The Sulidae: Gannets and Boobies. London: Oxford University Press). But are both the subordinate and the dominant chick affected in their agonistic tendencies by early social experience? To answer this, we permanently paired subordinate and dominant chicks, 2-3 weeks old, with singletons (chicks lacking experience with a nestmate) by cross-fostering. During the first 4 h after pairing, subordinate chicks were seven times less aggressive than singletons and twice as likely to be submissive; dominant chicks were six times as aggressive as singletons. Although most subordinates consistently lost agonistic encounters during the first 10 days after pairing, the proportion of dominants that won decreased progressively until, by day 6, only about half of dominant chicks were winning. Early social experience has a strong but reversable training effect on both subordinates and dominants. Training as a subordinate showed more persistent effects than training as a dominant, possibly in part because our testing situation perpetuated subordinate training and counteracted dominant training. | ||||
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 861 | ||
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| Author | Karavanich, C.; Atema, J. | ||||
| Title | Individual recognition and memory in lobster dominance | Type | Journal Article | ||
| Year | 1998 | Publication | Animal Behaviour. | Abbreviated Journal | Anim. Behav. |
| Volume | 56 | Issue | 6 | Pages | 1553-1560 |
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| Abstract | American lobsters,Homarus americanus, form stable dominance relationships in captivity. Size, sex and stage in the moult cycle are important determinants for dominance. Other factors, such as recent agonistic experience play a role. This paper investigates how lobsters maintain their stable dominance relationships: they may recognize individuals or alternatively, recognize overall dominance status. We paired lobsters in two consecutive `boxing matches'. Results indicate that lobsters remember familiar opponents when kept either in isolation or in communal tanks for 24 h between their first and second fights. Subordinates immediately backed away from familiar dominants, avoiding a second fight. In some animals, this memory lasted between 1-2 weeks if pairs were kept separate between the first and second fights. When paired for the second fight against unfamiliar dominant lobsters, subordinate lobsters from first fights actively fought and won the encounter. These results suggest that lobsters are capable of `individual recognition'. In nature, the observed social organization of lobsters may be maintained by individual recognition of a small number of residents inhabiting separate, nearby shelters. | ||||
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 866 | ||
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| Author | Schnitzer, U. | ||||
| Title | Grundsätze der Gymnastizierung des Reitpferdes | Type | Book Whole | ||
| Year | 1998 | Publication | Abbreviated Journal | ||
| Volume | Issue | Pages | 16 | ||
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| Language | Deutsch | Summary Language | Original Title | ||
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| Notes | Approved | no | |||
| Call Number | Reiten Lesen Denken @ eberhardhuebener @ | Serial | 1064 | ||
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| Author | Bürger, U. | ||||
| Title | The Way to perfect Horsemanship | Type | Book Whole | ||
| Year | 1998 | Publication | Abbreviated Journal | ||
| Volume | Issue | Pages | 254 | ||
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| Abstract | The Way to Perfect Horsemanship is an outstanding work in the vast literature devoted to horsemanship. It provides, for the first time, a clear insight into the psychological makeup of the horse, its muscular system, the mechanics of its movement, and the aids to human-to-horse communication. Udo Burger presents his philosophy of riding in a scientific manner, asserting that no one can no more learn to ride without a knowledge of horse physiology and psychology than one can learn the art of medecine without a background in health and disease. He clearly explains what one should feel and do on horseback--ultimately, as if one is part of the horse, completely united with it in all of its movements. Anyone with a genuine empathy for horses--wether teacher, trainer, competitor, or occasional rider--will benefit enormously from reading this classic work on horsemanship. The late Udo Burger was an accomplished horseman and one of Germany's most esteemed equine veterinarians. | ||||
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| Publisher | Trafalgar Square Publishing | Place of Publication | Editor | ||
| Language | English | Summary Language | Original Title | ||
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| ISSN | ISBN | 978-1570761294 | Medium | ||
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| Notes | 1st English cased ed edition (October 1, 1998) | Approved | no | ||
| Call Number | Reiten Lesen Denken @ eberhardhuebener @ | Serial | 1594 | ||
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| Author | Galef, B. G. JR; White, D.J. | ||||
| Title | Mate-choice copying in Japanese quail, Coturnix coturnix japonica | Type | Journal Article | ||
| Year | 1998 | Publication | Animal Behaviour. | Abbreviated Journal | Anim. Behav. |
| Volume | 55 | Issue | 3 | Pages | 545-552 |
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| Notes | Approved | no | |||
| Call Number | Serial | 1814 | |||
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| Author | Stoehr S. | ||||
| Title | Evolution of mate-choice copying: a dynamic model | Type | Journal Article | ||
| Year | 1998 | Publication | Animal Behaviour. | Abbreviated Journal | Anim. Behav. |
| Volume | 55 | Issue | 4 | Pages | 893-903 |
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| Abstract | Mate-choice copying has recently been demonstrated in several species. Two, not mutually exclusive, explanations for copying have been proposed: it reduces sampling costs and/or error of mate choice. In guppies, Poecilia reticulata, and black grouse, Tetrao tetrix, young females seem most likely to copy. Therefore, copying may teach inexperienced females what attractive males look like. I developed a 2-year dynamic model, to investigate under which conditions a mate-copying strategy might first evolve. An original population of pure choosers was assumed, which was invaded by a mutant female, able to copy during her first mating season, thereby instantly improving her ability to assess male quality. Alternatively, she could either wait and learn by observing males, just as non-copiers may do, but incurring some time costs, or choose, relying on her own abilities. The degree to which copying occurred among these mutant, young, inexperienced females increased with an increasing proportion of old, experienced females in the population, and with decreasing time left until the end of the season. The model demonstrates that mate-choice copying may evolve, when young females are poor at discrimination and need to learn what high-quality males look like. Male quality proved to be unimportant for copying to evolve, as long as there are sufficient differences in quality for mate choice to be meaningful. As with previous models, time constraints are an important assumption for copying to be advantageous over non-copying. Copyright 1998 The Association for the Study of Animal Behaviour. Copyright 1998 The Association for the Study of Animal Behaviour. | ||||
| Address | Department of Zoology, Uppsala University, Sweden | ||||
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| ISSN | 0003-3472 | ISBN | Medium | ||
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| Notes | PMID:9632476 | Approved | no | ||
| Call Number | Serial | 1822 | |||
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| Author | Coleman, K.; Wilson, D.S. | ||||
| Title | Shyness and boldness in pumpkinseed sunfish: individual differences are context-specific | Type | Journal Article | ||
| Year | 1998 | Publication | Animal Behaviour. | Abbreviated Journal | Anim. Behav. |
| Volume | 56 | Issue | 4 | Pages | 927-936 |
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| Abstract | Natural selection often promotes a mix of behavioural phenotypes in a population. Adaptive variation in the propensity to take risks might explain individual differences in shyness and boldness in humans and other species. It is often implicitly assumed that shyness and boldness are general personality traits expressed across many situations. From the evolutionary standpoint, however, individual differences that are adaptive in one context (e.g. predator defence) may not be adaptive in other contexts (e.g. exploration of the physical environment or intraspecific social interactions). We measured the context specificity of shyness and boldness in a natural population of juvenile pumpkinseed sunfish,Lepomis gibbosus, by exposing the fish to a potentially threatening stimulus (a red-tipped metrestick extended towards the individual) and a nonthreatening stimulus (a novel food source). We also related these measures of shyness and boldness to behaviours observed during focal observations, both before and after the introduction of a predator (largemouth bass,Micropterus salmoides). Consistent individual differences were found within both contexts, but individual differences did not correlate across contexts. Furthermore, fish that were scored as intermediate in their response to the metrestick behaved most boldly as foragers and in response to the bass predators. These results suggest that shyness and boldness are context-specific and may not exist as a one-dimensional behavioural continuum even within a single context. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 2094 | |||
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