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| Author |
Reader, S.M. |
| Title |
Innovation and social learning: individual variation and brain evolution |
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Journal Article |
| Year |
2003 |
Publication |
Animal Biology (formerly Netherlands Journal of Zoology) |
Abbreviated Journal |
Anim. Biol. Leiden. |
| Volume |
53 |
Issue |
2 |
Pages |
147-158 |
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| Abstract |
This paper reviews behavioural, neurological and cognitive correlates of innovation at the individual, population and species level, focusing on birds and primates. Innovation, new or modified learned behaviour not previously found in the population, is the first stage in many instances of cultural transmission and may play an important role in the lives of animals with generalist or opportunistic lifestyles. Within-species, innovation is associated with low neophobia, high neophilia, and with high social learning propensities. Indices of innovatory propensities can be calculated for taxonomic groups by counting the frequency of reports of innovation in published literature. These innovation rate data provide a useful comparative measure for studies of behavioural flexibility and cognition. Innovation rate is positively correlated with the relative size of association areas in the brain, namely the hyperstriatum ventrale and neostriatum in birds, and the neocortex and striatum in primates. Innovation rate is also positively correlated with the reported variety of tool use, as well as interspecific differences in learning. Current evidence thus suggests similar patterns of cognitive evolution in primates and birds. |
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Equine Behaviour @ team @ |
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3395 |
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Bekoff,M; Allen, C; Burghardt, G. M. |
| Title |
The cognitive animal: Empirical and theoretical perspectives on animal cognition |
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Journal Article |
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2003 |
Publication |
Computers and Mathematics with Applications |
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46 |
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508-509 |
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The MIT Press |
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Cambridge, MA. |
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refbase @ user @ |
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3496 |
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Sluyter F.; Arseneault L.; Moffitt T.E.; Veenema A.H.; de Boer S.; Koolhaas J.M. |
| Title |
Toward an Animal Model for Antisocial Behavior: Parallels Between Mice and Humans: Aggression |
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Journal Article |
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2003 |
Publication |
Behavior Genetics |
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33 |
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563-574 |
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refbase @ user @ |
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3497 |
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Bekoff M. |
| Title |
Minding Animals, Minding Earth: Old Brains, New Bottlenecks |
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Journal Article |
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2003 |
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Zygon |
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38 |
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911-941 |
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refbase @ user @ |
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3498 |
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| Author |
Bekoff M. |
| Title |
Consciousness and Self in Animals: Some Reflections |
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Journal Article |
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2003 |
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Zygon |
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38 |
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229-245 |
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refbase @ user @ |
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3500 |
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| Author |
Tomasello M.; Call J.; Hare B. |
| Title |
Chimpanzees understand psychological states – the question is which ones and to what extent |
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Journal Article |
| Year |
2003 |
Publication |
Trends in Cognitive Sciences |
Abbreviated Journal |
Trends. Cognit. Sci. |
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7 |
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153-156 |
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refbase @ user @ |
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3501 |
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| Author |
Call, J. |
| Title |
Beyond learning fixed rules and social cues: abstraction in the social arena |
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Journal Article |
| Year |
2003 |
Publication |
Philosophical Transactions of the Royal Society B: Biological Sciences |
Abbreviated Journal |
Phil. Trans. Biol. Sci. |
| Volume |
358 |
Issue |
1435 |
Pages |
1189-1196 |
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Abstraction is a central idea in many areas of physical comparative cognition such as categorization, numerical competence or problem solving. This idea, however, has rarely been applied to comparative social cognition. In this paper, I propose that the notion of abstraction can be applied to the social arena and become an important tool to investigate the social cognition and behaviour processes in animals. To make this point, I present recent evidence showing that chimpanzees know about what others can see and about what others intend. These data do not fit either low-level mechanisms based on stimulus-response associations or high-level explanations based on metarepresentational mechanisms such as false belief attribution. Instead, I argue that social abstraction, in particular the development of concepts such as seeing in others, is key to explaining the behaviour of our closest relative in a variety of situations. |
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no |
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refbase @ user @ |
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3524 |
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McCall, C.A.; Salters, M.A.; Johnson, K.B.; Silverman, S.J.; McElhenney, W.H.; Lishak, R.S. |
| Title |
Equine utilization of a previously learned visual stimulus to solve a novel task |
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Journal Article |
| Year |
2003 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
82 |
Issue |
3 |
Pages |
163-172 |
| Keywords |
Horse; Learned stimulus; Novel task; Discrimination |
| Abstract |
Forty-four horses were used to determine if a learned stimulus could be used to increase acquisition of a response unrelated to the original learned task. Horses were paired by age, breed and sex. One randomly chosen horse from each pair served as the control while the remaining horse was trained to respond to a visual stimulus by pushing a lever to obtain a food reward. In Experiment I (n=28), the food reward was delivered in a feed box located equidistant between two levers located 2.7 m apart on one wall of the test stall. Trained horses were given 30 training trials daily until they achieved at least 85% correct responses in three nonconsecutive days. After each trained horse reached criterion, both horses in the pair were tested in 30 trials daily for five consecutive days in a modified Y maze. The stimulus that indicated the correct lever in the initial training task was used to signify the correct arm of the maze for both the control and trained horses. The correct arm of the maze was changed randomly during each daily session, and correct choices resulted in a food reward. In Experiment II (n=16), levers were located on opposite walls (11 m apart) of the test stall, and the stimulus and modified Y maze were simplified. Trained horses received 15 training trials daily until they reached at least 85% correct responses on three consecutive days. As each trained horse achieved this criterion, both horses in the pair were tested in a maze for 15 trials daily for 7 days. Again, the stimulus from initial lever-pressing task was used to signify the rewarded arm of the maze. Correct choices of trained and control horses in both experiments were compared using a paired t-test. In Experiment I, no differences (P>0.34) in mean correct responses were detected between trained and control horses on the first day in the maze (15.3 and 16.8, respectively) or after 5 days in the maze (84.0 and 82.1, respectively). Similarly, in Experiment II, trained and control horses did not differ (P>0.50) in mean correct responses on the first day (6.9 and 7.4, respectively) or after 7 days in the maze (63.6 and 61.6, respectively). These results indicate that the stimuli used to solve the lever-pressing task were not utilized by horses in the maze task, and that horses may have difficulty transferring learned visual stimuli to new tasks. |
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Equine Behaviour @ team @ |
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3587 |
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Bachmann, I.; Bernasconi, P.; Herrmann, R.; Weishaupt, M.A.; Stauffacher, M. |
| Title |
Behavioural and physiological responses to an acute stressor in crib-biting and control horses |
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Journal Article |
| Year |
2003 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
82 |
Issue |
4 |
Pages |
297-311 |
| Keywords |
Horse welfare; Stereotypies; Crib-biting; Pituitary-adrenocortical axis; Sympatho-adrenomedullar axis; Stress response; Stress sensibility |
| Abstract |
The responses of eleven pairs of crib-biting and non-crib-biting horses (controls) to an arousal-inducing stimulus were studied. Video-observation of the horses revealed that crib-biting horses spent between 10.4 and 64.7% of their stabling time performing the stereotypy. During the first 2 days of an experimental period, the horses were conditioned to receive food from a special bucket. On the third day the food bucket was presented, but the horses were not allowed to feed. Arousal behaviour and crib-biting intensity as well as plasma cortisol concentration, heart rate (HR) and heart rate variability (HRV) were recorded at rest, and during and after presentation of the food stimulus. The stimulus induced a significant increase of HR and arousal behaviour in crib-biters and in controls, whereas the crib-biting frequency decreased. Power spectral analysis of the HRV revealed significant differences between crib-biters and controls at rest: crib-biters had a lower vagal tone (high frequency component, HF) and a higher sympathetic tone (low frequency component, LF) than controls. The lower basal parasympathetic activity might be an indication why crib-biting horses, in contrast to the controls, showed neither a significant decrease of the HF component during presentation of the food stimulus nor an increase of the HF component after presentation. Thus, there might be differences in the tuning of the autonomous nervous system and of the stress reactivity in crib-biting and in control horses. The results suggest that the crib-biting horses are more stress sensitive and physiologically and psychologically less flexible than the control horses. |
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Equine Behaviour @ team @ |
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3614 |
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McGuigan, M.P.; Wilson, A.M. |
| Title |
The effect of gait and digital flexor muscle activation on limb compliance in the forelimb of the horse Equus caballus |
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Journal Article |
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2003 |
Publication |
The Journal of Experimental Biology |
Abbreviated Journal |
J Exp Biol |
| Volume |
206 |
Issue |
Pt 8 |
Pages |
1325-1336 |
| Keywords |
Animals; Biomechanics; Forelimb/anatomy & histology/*physiology; Gait/*physiology; Horses/anatomy & histology/*physiology; Muscle Contraction/*physiology; Running |
| Abstract |
A horse's legs are compressed during the stance phase, storing and then returning elastic strain energy in spring-like muscle-tendon units. The arrangement of the muscle-tendon units around the lever-like joints means that as the leg shortens the muscle-tendon units are stretched. The forelimb anatomy means that the leg can be conceptually divided into two springs: the proximal spring, from the scapula to the elbow, and the distal spring, from the elbow to the foot. In this paper we report the results of a series of experiments testing the hypothesis that there is minimal scope for muscle contraction in either spring to adjust limb compliance. Firstly, we demonstrate that the distal, passive leg spring changes length by 127 mm (range 106-128 mm) at gallop and the proximal spring by 12 mm (9-15 mm). Secondly, we demonstrate that there is a linear relationship between limb force and metacarpo-phalangeal (MCP) joint angle that is minimally influenced by digital flexor muscle activation in vitro or as a function of gait in vivo. Finally, we determined the relationship between MCP joint angle and vertical ground-reaction force at trot and then predicted the forelimb peak vertical ground-reaction force during a 12 m s(-1) gallop on a treadmill. These were 12.79 N kg(-1) body mass (BM) (range 12.07-13.73 N kg(-1) BM) for the lead forelimb and 15.23 N kg(-1) BM (13.51-17.10 N kg(-1) BM) for the non-lead forelimb. |
| Address |
Structure and Motion Laboratory, Veterinary Basic Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK. m.p.mcguigan@leeds.ac.uk |
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English |
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0022-0949 |
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PMID:12624168 |
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Equine Behaviour @ team @ |
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3655 |
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