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Author |
Mendl, M.; Paul, E.S. |
Title |
Consciousness, emotion and animal welfare: insights from cognitive science |
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Journal Article |
Year |
2004 |
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Animal Welfare |
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13 |
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17-25 |
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refbase @ user @ |
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3512 |
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Josep Call; Brian Hare; Malinda Carpenter; Michael Tomasello |
Title |
`Unwilling' versus `unable': chimpanzees' understanding of human intentional action |
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Journal Article |
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2004 |
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Developmental Science |
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7 |
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488-498 |
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refbase @ user @ |
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3517 |
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Author |
Yacoub Khallad |
Title |
Conceptualization in the pigeon: What do we know? |
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Journal Article |
Year |
2004 |
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International Journal of Psychology |
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39 |
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73-94 |
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refbase @ user @ |
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3519 |
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Author |
Passani M. B.; Blandina P. |
Title |
The Neuronal Histaminergic System in Cognition |
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Journal Article |
Year |
2004 |
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Current Medicinal Chemistry – Central Nervous System Agents |
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4 |
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17-26 |
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3520 |
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Author |
Hunt, G.R.; Gray, R.D. |
Title |
The crafting of hook tools by wild New Caledonian crows |
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Journal Article |
Year |
2004 |
Publication |
Proceedings of the Royal Society B: Biological Sciences |
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Proc. Roy. Soc. Lond. B Biol. Sci. |
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271 |
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S88-S90 |
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The 'crafting' of tools involves (i) selection of appropriate raw material, (ii) preparatory trimming and (iii) fine, three-dimensional sculpting. Its evolution is technologically important because it allows the open-ended development of tools. New Caledonian crows manufacture an impressive range of stick and leaf tools. We previously reported that their toolkit included hooked implements made from leafy twigs, although their manufacture had never been closely observed. We describe the manufacture of 10 hooked-twig tools by an adult crow and its dependent juvenile. To make all 10 tools, the crows carried out a relatively invariant three-step sequence of complex manipulations that involved (i) the selection of raw material, (ii) trimming and (iii) a lengthy sculpting of the hook. Hooked-twig manufacture contrasts with the lack of sculpting in the making of wooden tools by other non-humans such as chimpanzees and woodpecker finches. This fine, three-stage crafting process removes another alleged difference between humans and other animals. |
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3526 |
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Author |
Murphy, J.; Waldmann, T.; Arkins, S. |
Title |
Sex differences in equine learning skills and visuo-spatial ability |
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Journal Article |
Year |
2004 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
Volume |
87 |
Issue |
1-2 |
Pages |
119-130 |
Keywords |
Horses; Sex differences; Visuo-spatial ability; Learning |
Abstract |
There is evidence of superior visuo-spatial ability in males compared to females in most species investigated to-date. However, no known studies have addressed this issue in the equine. Equine visuo-spatial ability was investigated using a novel test apparatus with a sample of 62 horses (males=34 and females=28) during a series of six tests, where the horses were required to access a food source. The test apparatus consisted of a series of four adjacent stalls, each of which had a feed bin and a moveable barrier. The test apparatus was designed such that the breastplate barriers controlled and limited access by the horses to feed bins in all but one stall during each test. Male horses performed such that there were significant differences (P<0.05) in the ability of the subjects to complete all six tests in a mean time of 30 s or less per test. There were significant differences in mean completion times for male subjects between test 1 and test 2 (P<0.05), test 1 and test 3 (P<0.001), test 1 and test 4 (P<0.05) and test 1 and test 5 (P<0.05). There were no significant differences in mean completion times between any of the six tests for female subjects. Males had a lower mean total number of errors during all tests. Male horses also successfully completed significantly more tests than females (P<0.05). These results provide the first behavioural demonstration of superior visuo-spatial ability in male horses, similar to that reported in other species. |
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Equine Behaviour @ team @ |
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3560 |
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Author |
Williams, J.L.; Friend, T.H.; Nevill, C.H.; Archer, G. |
Title |
The efficacy of a secondary reinforcer (clicker) during acquisition and extinction of an operant task in horses |
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Journal Article |
Year |
2004 |
Publication |
Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
Volume |
88 |
Issue |
3-4 |
Pages |
331-341 |
Keywords |
Equine; Horse; Clicker training; Operant conditioning; Secondary reinforcers |
Abstract |
“Clicker training” is a popularly promoted training method based on operant conditioning with the use of a secondary reinforcer (the clicker). While this method draws from theories of learning and is used widely, there has been little scientific investigation of its efficacy. We used 60 horses, Equus callabus, and assigned each horse to one of six reinforcement protocols. The reinforcement protocols involved combinations of reinforcers administered (primary versus secondary plus primary), schedule of reinforcement (continuous versus variable ratio), and reinforcers applied during extinction (none or secondary). There were no differences (P>=0.11) between horses which received a secondary reinforcer (click) followed by the primary reinforcer (food) and those which received only the primary reinforcer (food) in the number of trials required to train the horses to touch their noses to a plastic cone (operant response). There also were no differences (P>=0.12) between horses which received the secondary reinforcer plus primary reinforcer and those which received only the primary reinforcer in regards to the number of trials to extinction. We conclude that there is no difference in the amount of training required to learn the operant task or in the task's resistance to extinction between horses that received a secondary reinforcer followed by a primary reinforcer versus horses which received only a primary reinforcer. |
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Equine Behaviour @ team @ |
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3581 |
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Author |
Birke, L.; Bryld, M.; Lykke, N. |
Title |
Animal Performances: An Exploration of Intersections between Feminist Science Studies and Studies of Human/Animal Relationships |
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Journal Article |
Year |
2004 |
Publication |
Feminist Theory |
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Fem Theor |
Volume |
5 |
Issue |
2 |
Pages |
167-183 |
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Feminist science studies have given scant regard to non-human animals. In this paper, we argue that it is important for feminist theory to address the complex relationships between humans and other animals, and the implications of these for feminism. We use the notion of performativity, particularly as it has been developed by Karen Barad, to explore the intersections of feminism and studies of the human/animal relationship. Performativity, we argue, helps to challenge the persistent dichotomy between human/culture and animals/nature. It emphasizes, moreover, how animality is a doing or becoming, not an essence; so, performativity allows us to think about the complexity of human/animal interrelating as a kind of choreography, a co-creation of behaviour. We illustrate the discussion using the example of the laboratory rat, who can be thought of both in terms of a materialization of specific scientific practices and as active participants in the creation of their own meaning, alongside the human participants in science. There are three, intertwined, senses in which we might think about performativity – that of animality, of humannness, and of the relationship between the two. Bringing animals into discussions about performativity poses questions for both feminist theory and for the study of human/animal relationships, we argue: both human and animal can conjointly be engaged in reconfiguring the world, and our theorizing must reflect that complexity. We are all matter, and we all matter. |
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10.1177/1464700104045406 |
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Equine Behaviour @ team @ |
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3594 |
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Author |
McBride, S.D.; Hemmings, A.; Robinson, K. |
Title |
A preliminary study on the effect of massage to reduce stress in the horse |
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Journal Article |
Year |
2004 |
Publication |
Journal of Equine Veterinary Science |
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24 |
Issue |
2 |
Pages |
76-81 |
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The use of massage (as a potential form of acupressure) has long been documented as a human relaxation aid. However, little scientific research has been carried out into its potential use as a form of stress reduction in the horse. This preliminary study investigated the effect of massage at six different sites (thoracic trapezius [withers], mid-brachiocephalicus, cervical ventral serrate and cervical trapezius [mid-neck], proximal gluteal fascia and proximal superficial gluteal [croup], proximal and mid-semitendinosus [second thigh], lateral triceps, proximal extensor carpi radialis and proximal common digital extensor [forearm], proximal brachiocephalicus, proximal splenius and ear [poll and ears) on stress-related behavioral and physiological (heart rate [HR]) measures in the horse. Ten riding school ponies/horses were massaged at each of the six sites (three preferred and three nonpreferred sites of allogrooming (mutual grooming between conspecifics) and changes in HR and behavior were recorded. The results indicated that during massage, all sites except the forearm resulted in a significant reduction in HR (P < .05) with massage at the withers, mid-neck, and croup having the greatest effect (preferred sites of allogrooming). Massage at preferred sites of allogrooming also elicited significantly more (P < .05) positive behavioral responses compared with the three nonpreferred sites. The practical implications of this study are discussed. |
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Equine Behaviour @ team @ |
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3617 |
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McGee, S.; Smith, H.V. |
Title |
Accompanying pre-weaned Thoroughbred (Equus caballus) foals while separated from the mare during covering reduces behavioural signs of distress exhibited |
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Journal Article |
Year |
2004 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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88 |
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1-2 |
Pages |
137-147 |
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Distress; Foals; Maternal separation; Stereotypies; Welfare |
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Some Thoroughbred stallion farms separate the mare from the foal during breeding, leaving the foal alone in its stall. Such separation often leads to distress in the foal, as evidenced by behavioural indicators such as vocalisations, pacing or moving about, pawing and striking the body against solid objects. This study examined whether the foal's distress is reduced if a handler accompanies it during the period of separation. A total of 57 foals on an Irish stud farm were observed: 27 foals were accompanied during separation and 30 were left in isolation but discretely observed from outside the stall. On average, unaccompanied foals vocalised at significantly (P<0.001) shorter intervals (14.8 s versus 26.8 s), and spent significantly (P<0.05) more time pawing (29.6 s versus 6.8 s) than accompanied ones. In addition, 17 of the unaccompanied foals hurled themselves against a solid object on at least one occasion, while not one of the accompanied foals did this (P<0.001). Age, gender and number of times the foal had been previously separated from the mare while she was being teased or covered were not significantly related to any of the behavioural indicators of distress. Overall, the data provide clear evidence that accompanying a foal reduces the distress that it exhibits when separated from the mare. This procedure has obvious welfare benefits in the short term, in that the foal both experiences less distress and has a reduced likelihood of injuring itself, and it may have longer-term benefits by reducing the chance of the animal later developing a locomotory stereotypical behaviour. |
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Equine Behaviour @ team @ |
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3639 |
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