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Author |
Schnitzer, U. |
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Title |
Grundsätze der Gymnastizierung des Reitpferdes |
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1998 |
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16 |
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Reiten Lesen Denken @ eberhardhuebener @ |
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1064 |
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Author |
Vallortigara, G.; Regolin, L.; Rigoni, M.; Zanforlin, M. |
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Title |
Delayed search for a concealed imprinted object in the domestic chick |
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Journal Article |
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Year |
1998 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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1 |
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1 |
Pages |
17-24 |
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Five-day-old chicks were accustomed to follow an imprinted object (a small red ball with which they had been reared) that was moving slowly in a large arena, until it disappeared behind an opaque screen. In experiments, each chick was initially confined in a transparent cage, from where it could see and track the ball while it moved towards, and then beyond, one of two screens. The screens could be either identical or differ in colour and pattern. Either immediately after the disappearance of the ball, or with a certain delay, the chick was released and allowed to search for its imprinted object behind either screen. The results showed that chicks took into account the directional cue provided by the ball movement and its concealment, up to a delay period of about 180 s, independently of the perceptual characteristics of the two screens. If an opaque partition was positioned in front of the transparent cage immediately after the ball had disappeared, so that, throughout the delay, neither the goal-object nor the two screens were visible, chicks were still capable of remembering and choosing the correct screen, though over a much shorter period of about 60 s. The results suggest that, at least in this precocial bird species, very young chicks can maintain some form of representation of the location where a social partner was last seen, and are also capable of continuously updating this representation so as to take into account successive displacements of the goal-object. |
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Equine Behaviour @ team @ |
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3347 |
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Wittling, W.; Block, A.; Schweiger, E.; Genzel, S. |
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Title |
Hemisphere Asymmetry in Sympathetic Control of the Human Myocardium |
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Journal Article |
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Year |
1998 |
Publication |
Brain and Cognition |
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Brain Cogn. |
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38 |
Issue |
1 |
Pages |
17-35 |
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Hemisphere asymmetry in sympathetic control of myocardial performance was studied in healthy human subjects using lateralized film presentation for selective sensory stimulation of the hemispheres and impedance cardiography for the evaluation of cardiac output, systolic time intervals and myocardial contractility. Results revealed a clear and consistent right hemisphere predominance in sympathetically mediated control of various components of myocardial performance. There is reason to assume that the obtained hemisphere differences in autonomic control of the heart are self-reliant processes not depending on emotion-related hemisphere asymmetry. As far as we know, this is the first study examining the distinct roles of the cerebral hemispheres in neural control of ventricular myocardial functions. |
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0278-2626 |
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Equine Behaviour @ team @ |
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5351 |
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Author |
Schooening, B. |
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Title |
Ethology of the horse |
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Journal Article |
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Year |
1998 |
Publication |
Praktische Tierarzt |
Abbreviated Journal |
Prakt. Tierarzt |
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79 |
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6 Suppl. |
Pages |
25-28 |
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Dominance; Ethology; Horse; Propedeutics |
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The paper starts with a short introduction/definition about ethology and the used methods in this scientific field, giving special examples for horses and about how their “normal behaviour” is measured. The behaviour repertoire of horses is described in a brief outline with special emphasis on their social systems and hierarchies and the problem of dominance, especially in interaction with humans. Schlütersche GmbH & Co. KG, Verlag und Druckerei. |
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Saselbergweg 32, 22395 Hamburg, Germany |
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0032681x (Issn) |
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Cited By (since 1996): 1; Export Date: 21 April 2007; Source: Scopus; Language of Original Document: German; Correspondence Address: Schoßning, B.Saselbergweg 32 22395 Hamburg, Germany; email: Dr.B.Schoening@t-online.de |
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refbase @ user @ |
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789 |
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McGreevy, P.D.; Nicol, C.J. |
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Title |
The effect of short-term prevention on the subsequent rate of crib-biting in thoroughbred horses |
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Journal Article |
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Year |
1998 |
Publication |
Equine veterinary journal. Supplement |
Abbreviated Journal |
Equine Vet J Suppl |
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27 |
Pages |
30-34 |
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Analysis of Variance; Animals; *Behavior, Animal; Horse Diseases/*prevention & control/psychology; Horses; Male; Recurrence; *Stereotyped Behavior; Videotape Recording |
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The results of an experimental study of the motivational consequences of short-term prevention of crib-biting are reported here. Eight test horses wore a cribbing collar for 24 h. This was effective in preventing crib-biting in 6 subjects. Using analysis of co-variance that accounted for baseline differences in crib-biting rate, test horses showed significantly more crib-biting than control horses on the first day after prevention (P < 0.05). There was also a highly significant increase in the crib-biting rate of test horses on the first day after prevention in comparison with their baseline rate (P < 0.01). This defines the increase as a post inhibitory rebound. An increase in the novelty of the cribbing bar and an increase in feeding motivation during the period of prevention are rejected as explanations of the rebound in this study. Instead, it is suggested that the rebound reflected a rise in internal motivation to crib-bite during the period of prevention. Behaviours that exhibit this pattern of motivation are generally considered functional; and it has been argued that their prevention may compromise welfare. |
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Department of Clinical Veterinary Science, University of Bristol, UK |
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PMID:10485001 |
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refbase @ user @ |
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88 |
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Mench, J.A.; Morrow-Tesch, J.; Chu, L.-R. |
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Title |
Environmental enrichment for farm animals |
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Journal Article |
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Year |
1998 |
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Lab Animal |
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Lab Anim. |
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27 |
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32-36 |
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ISSN : 0093-7355 |
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Equine Behaviour @ team @ |
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6188 |
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Author |
McGreevy, P.D.; Nicol, C.J. |
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Title |
Prevention of crib-biting: a review |
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Journal Article |
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Year |
1998 |
Publication |
Equine veterinary journal. Supplement |
Abbreviated Journal |
Equine Vet J Suppl |
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27 |
Pages |
35-38 |
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Animals; *Behavior, Animal; Horse Diseases/*prevention & control/psychology; Horses; *Stereotyped Behavior |
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Crib-biting is a common oral stereotype. Because of perceived deleterious effects on the health and appearance of subjects the prevention of crib-biting is regularly attempted. The resourcefulness of horses in satisfying their motivation to perform this behaviour often frustrates owners' efforts at prevention. This paper reviews the efficacy and observable consequences of attempting to prevent crib-biting by a variety of methods. These include attempts to prevent the grasping of objects, to interfere with air-engulfing and to introduce punishment for grasping and neck-flexion. Other approaches include the use of surgery, acupuncture, pharmaceuticals, operant feeding and environmental enrichment. A remedy that is effective for every crib-biter remains elusive. We conclude that, rather than concentrating on remedial prevention, further research should be directed at establishing why horses crib-bite and how the emergence of crib-biting can be avoided. |
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Department of Clinical Veterinary Science, University of Bristol, UK |
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PMID:10485002 |
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refbase @ user @ |
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87 |
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Author |
Santi, A.; Stanford, L.; Symons, J. |
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An analysis of confusion errors in many-to-one matching with temporal and nontemporal samples |
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Journal Article |
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Year |
1998 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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1 |
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1 |
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37-46 |
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In experiment 1, pigeons were trained to match temporal (2, 8, and 10 s of houselight) and location (feeder light, left key, center key illumination) samples to color comparison stimuli. Red choices were correct following the 2-s and feeder light, orange choices were correct following the 8-s and center key, and green choices were correct following the 10-s and left key. Samples that were harder to discriminate (8- vs 10-s, and left vs center key) were mapped onto comparisons that were easy to discriminate (orange vs green), while samples that were easier to discriminate (2- vs 8-s, and feeder light vs left key) were mapped onto comparisons that were hard to discriminate(red vs orange). The pattern of errors for temporal and location samples indicated that these samples were not represented by a common code even though they were associated with the same comparison stimuli. In experiment 2, the same pigeons were trained with visual samples in which samples that were hard to discriminate (triangle vs circle) were mapped onto comparisons that were easy to discriminate (orange vs green), while samples that were easy to discriminate(plus vs triangle) were mapped onto comparisons that were hard to discriminate (red vs orange). Following acquisition of the visual discrimination, the temporal samples were re-introduced and many-to-one training was continued. During delay testing, the pattern of errors for temporal and visual samples was equivalent and consistent with the hypothesis that visual samples were being coded in terms of the duration appropriate for the temporal sample with which it shared a common comparison response. Data from no-sample test sessions ruled out a simple response bias explanation of the data. The properties of common codes for temporal and nontemporal events can be somewhat flexible and more complicated than previously envisaged. |
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Equine Behaviour @ team @ |
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3218 |
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Author |
Cooper, J.J. |
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Comparative learning theory and its application in the training of horses |
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Journal Article |
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1998 |
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Equine veterinary journal. Supplement |
Abbreviated Journal |
Equine Vet J Suppl |
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27 |
Pages |
39-43 |
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Animals; *Behavior, Animal; Conditioning (Psychology); Horses/*psychology; *Learning; Reinforcement (Psychology) |
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Training can best be explained as a process that occurs through stimulus-response-reinforcement chains, whereby animals are conditioned to associate cues in their environment, with specific behavioural responses and their rewarding consequences. Research into learning in horses has concentrated on their powers of discrimination and on primary positive reinforcement schedules, where the correct response is paired with a desirable consequence such as food. In contrast, a number of other learning processes that are used in training have been widely studied in other species, but have received little scientific investigation in the horse. These include: negative reinforcement, where performance of the correct response is followed by removal of, or decrease in, intensity of a unpleasant stimulus; punishment, where an incorrect response is paired with an undesirable consequence, but without consistent prior warning; secondary conditioning, where a natural primary reinforcer such as food is closely associated with an arbitrary secondary reinforcer such as vocal praise; and variable or partial conditioning, where once the correct response has been learnt, reinforcement is presented according to an intermittent schedule to increase resistance to extinction outside of training. |
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Department of Zoology, University of Oxford, UK |
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PMID:10485003 |
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refbase @ user @ |
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846 |
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Author |
Allen, C. |
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Title |
Assessing animal cognition: ethological and philosophical perspectives |
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Journal Article |
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Year |
1998 |
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Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
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76 |
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1 |
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42-47 |
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Agriculture; Animal Welfare; Animals; Animals, Domestic/physiology/*psychology; Behavior, Animal/*physiology; Cognition/*physiology; *Ethology; *Philosophy; Research |
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Developments in the scientific and philosophical study of animal cognition and mentality are of great importance to animal scientists who face continued public scrutiny of the treatment of animals in research and agriculture. Because beliefs about animal minds, animal cognition, and animal consciousness underlie many people's views about the ethical treatment of nonhuman animals, it has become increasingly difficult for animal scientists to avoid these issues. Animal scientists may learn from ethologists who study animal cognition and mentality from an evolutionary and comparative perspective and who are at the forefront of the development of naturalistic and laboratory techniques of observation and experimentation that are capable of revealing the cognitive and mental properties of nonhuman animals. Despite growing acceptance of the ethological study of animal cognition, there are critics who dispute the scientific validity of the field, especially when the topic is animal consciousness. Here, a proper understanding of developments in the philosophy of mind and the philosophy of science can help to place cognitive studies on a firm methodological and philosophical foundation. Ultimately, this is an interdisciplinary task, involving scientists and philosophers. Animal scientists are well-positioned to contribute to the study of animal cognition because they typically have access to a large pool of potential research subjects whose habitats are more controlled than in most field studies while being more natural than most laboratory psychology experiments. Despite some formidable questions remaining for analysis, the prospects for progress in assessing animal cognition are bright. |
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Department of Philosophy, Texas A&M University, College Station 77843-4237, USA |
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0021-8812 |
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PMID:9464883 |
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Equine Behaviour @ team @ |
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2750 |
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