| Records |
| Author |
Cloutier, S.; Newberry, R.C.; Honda, K.; Alldredge, J.R. |
Title  |
Cannibalistic behaviour spread by social learning |
Type |
Journal Article |
| Year |
2002 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
63 |
Issue |
6 |
Pages |
1153-1162 |
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| Abstract |
We hypothesized that social learning is involved in the spread of cannibalism in domestic fowlGallus gallus domesticus . To investigate this hypothesis without harming birds, we used an inanimate chicken model as our cannibalism stimulus. We randomly assigned flocks of 12 White Leghorn pullets to one of two treatments: (1) flocks with two trained demonstrators (N=9) and (2) control flocks (N=8). Demonstrators were trained to pierce a membrane covering a dish of chicken blood and consume the blood. To assess the effect of access to the cannibalism stimulus during demonstrations, we randomly assigned observer pairs to one of two observer treatments: (1) observe stimulus through a wire mesh partition and (2) observe stimulus within the same enclosure. We conducted five 10-min demonstration sessions, each followed by a 10-min test of each observer pair in the absence of demonstrators, over a period of 15 days when the birds were 41-55 days of age, and two further tests at 63-64 and 91-92 days of age. Pairs that observed demonstrators piercing a membrane and consuming blood were more likely to perform this task when tested than control pairs. Learning of the task was enhanced by direct access to the cannibalism stimulus rather than observing it through a wire mesh partition. Blood consumption during tests was increased by direct access to the cannibalism stimulus during demonstration sessions. The birds made bigger holes in the membrane when tested after observing trained demonstrators and after having direct access to the stimulus. Our results provide the first experimental evidence that social learning can contribute to the spread of cannibalistic behaviour in domestic fowl. We suggest that stimulus enhancement and observational conditioning were the social-learning mechanisms involved. Copyright 2002 The Association for the Study of Animal Behaviour. Published by Elsevier Science Ltd. All rights reserved. |
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2091 |
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Zentall, T.R.; Galizio, M.; Critchfied, T.S. |
| Title |
Categorization, concept learning, and behavior analysis: an introduction |
Type |
Journal Article |
| Year |
2002 |
Publication |
Journal of the experimental analysis of behavior |
Abbreviated Journal |
J Exp Anal Behav |
| Volume |
78 |
Issue |
3 |
Pages |
237-248 |
| Keywords |
Animals; Association Learning; *Concept Formation; *Discrimination Learning; Humans; Language |
| Abstract |
Categorization and concept learning encompass some of the most important aspects of behavior, but historically they have not been central topics in the experimental analysis of behavior. To introduce this special issue of the Journal of the Experimental Analysis of Behavior (JEAB), we define key terms; distinguish between the study of concepts and the study of concept learning; describe three types of concept learning characterized by the stimulus classes they yield; and briefly identify several other themes (e.g., quantitative modeling and ties to language) that appear in the literature. As the special issue demonstrates, a surprising amount and diversity of work is being conducted that either represents a behavior-analytic perspective or can inform or constructively challenge this perspective. |
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Department of Psychology, University of Kentucky, Lexington 40506, USA. zentall@pop.uky.edu |
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0022-5002 |
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PMID:12507002 |
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no |
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refbase @ user @ |
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236 |
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Miklósi, Á. |
| Title |
Cecilia Heyes and Ludwig Huber (eds): The Evolution of Cognition |
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Journal Article |
| Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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5 |
Issue |
3 |
Pages |
187-189 |
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Equine Behaviour @ team @ |
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3096 |
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Neveu, P.J. |
| Title |
Cerebral Lateralisation and the Immune System |
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Book Chapter |
| Year |
2002 |
Publication |
International Review of Neurobiology: Neurobiology of the Immune System |
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52 |
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303-318 |
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Academic Press |
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Amsterdam |
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Clow, A.; Hucklebridge, F. |
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Equine Behaviour @ team @ |
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5828 |
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Tebbich, S.; Bshary, R.; Grutter, A.S. |
| Title |
Cleaner fish Labroides dimidiatus recognise familiar clients |
Type |
Journal Article |
| Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
5 |
Issue |
3 |
Pages |
139-145 |
| Keywords |
Adaptation, Physiological; Animals; *Evolution; *Fishes; Motivation; *Recognition (Psychology); Social Behavior; Visual Perception |
| Abstract |
Individual recognition has been attributed a crucial role in the evolution of complex social systems such as helping behaviour and cooperation. A classical example for interspecific cooperation is the mutualism between the cleaner fish Labroides dimidiatus and its client reef fish species. For stable cooperation to evolve, it is generally assumed that partners interact repeatedly and remember each other's past behaviour. Repeated interactions may be achieved by site fidelity or individual recognition. However, as some cleaner fish have more than 2,300 interactions per day with various individuals per species and various species of clients, basic assumptions of cooperation theory might be violated in this mutualism. We tested the cleaner L. dimidiatus and its herbivorous client, the surgeon fish Ctenochaetus striatus, for their ability to distinguish between a familiar and an unfamiliar partner in a choice experiment. Under natural conditions, cleaners and clients have to build up their relationship, which is probably costly for both. We therefore predicted that both clients and cleaners should prefer the familiar partner in our choice experiment. We found that cleaners spent significantly more time near the familiar than the unfamiliar clients in the first 2 minutes of the experiment. This indicates the ability for individual recognition in cleaners. In contrast, the client C. striatus showed no significant preference. This could be due to a sampling artefact, possibly due to a lack of sufficient motivation. Alternatively, clients may not need to recognise their cleaners but instead remember the defined territories of L. dimidiatus to achieve repeated interactions with the same individual. |
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Max Planck Institute for Behaviour and Physiology, 82319 Seewiesen, Germany. tebbich@ss20.mpi-seewiesen.mpg.de |
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1435-9448 |
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PMID:12357286 |
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no |
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Equine Behaviour @ team @ |
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2599 |
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Casey, R. |
| Title |
Clinical Problems Associated with the Intensive Management of Performance Horses |
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Book Chapter |
| Year |
2002 |
Publication |
The Welfare of Horses |
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19-44 |
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The physical as well as the behavioural requirements of the horse changed little through the process of domestication. This means that horses kept within an intensively housed environment and used for performance, physically and behaviourally are susceptible to specific clinical conditions, injuries and diseases. In this chapter, physiological and clinical problems such as those causing pain related behaviours and head shaking are discussed. The most commonly associated problems with horses kept in intensive housing conditions or used in specific competitive disciplines are highlighted. Despite the increasing amount of information about injury and disease in the horse, there is little research relating such problems to the situations performance horses have to cope with. This is particularly the case with pain, whose recognition of pain amongst professionals is still variable and often subjective and not widely recognised as a cause of behavioural change. |
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Equine Behaviour @ team @ |
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4376 |
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Huebener, E. |
| Title |
Coaxing seat, breathing leg, whispering reins |
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Book Whole |
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2002 |
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2nd edition |
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220 |
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0948-9708 |
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3-487-08408-2 |
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Reiten Lesen Denken @ eberhardhuebener @ |
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875 |
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Garamszegi, L.Z.; Møller, A.P.; Erritzøe, J. |
| Title |
Coevolving avian eye size and brain size in relation to prey capture and nocturnality |
Type |
Journal Article |
| Year |
2002 |
Publication |
Proceedings of the Royal Society of London. Series B: Biological Sciences |
Abbreviated Journal |
Proc Roy Soc Lond B Biol Sci |
| Volume |
269 |
Issue |
1494 |
Pages |
961-967 |
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adaptation; behaviour; brain size; coevolution; eye size; vision |
| Abstract |
Behavioural adaptation to ecological conditions can lead to brain size evolution. Structures involved in behavioural visual information processing are expected to coevolve with enlargement of the brain. Because birds are mainly vision–oriented animals, we tested the predictions that adaptation to different foraging constraints can result in eye size evolution, and that species with large eyes have evolved large brains to cope with the increased amount of visual input. Using a comparative approach, we investigated the relationship between eye size and brain size, and the effect of prey capture technique and nocturnality on these traits. After controlling for allometric effects, there was a significant, positive correlation between relative brain size and relative eye size. Variation in relative eye and brain size were significantly and positively related to prey capture technique and nocturnality when a potentially confounding variable, aquatic feeding, was controlled statistically in multiple regression of independent linear contrasts. Applying a less robust, brunching approach, these patterns also emerged, with the exception that relative brain size did not vary with prey capture technique. Our findings suggest that relative eye size and brain size have coevolved in birds in response to nocturnal activity and, at least partly, to capture of mobile prey. |
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10.1098/rspb.2002.1967 |
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Equine Behaviour @ team @ |
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5452 |
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Pepperberg, I.M. |
| Title |
Cognitive and Communicative Abilities of Grey Parrots |
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Journal Article |
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2002 |
Publication |
Current Directions in Psychological Science |
Abbreviated Journal |
Curr. Dir. Psychol. Sci. |
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11 |
Issue |
3 |
Pages |
83-87 |
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Grey parrots (Psittacus erithacus) solve various cognitive tasks and acquire and use English speech in ways that often resemble those of very young children. Given that the psittacine brain is organized very differently from that of mammals, these results have intriguing implications for the study and evolution of vocal learning, communication, and cognition. |
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refbase @ user @ |
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580 |
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Acuna, B.D.; Sanes, J.N.; Donoghue, J.P. |
| Title |
Cognitive mechanisms of transitive inference |
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Journal Article |
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2002 |
Publication |
Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale |
Abbreviated Journal |
Exp Brain Res |
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146 |
Issue |
1 |
Pages |
1-10 |
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Adolescent; Adult; Attention/*physiology; Cognition/*physiology; Female; Humans; Learning/physiology; Linear Models; Male; Photic Stimulation; Psychomotor Performance/physiology; Reaction Time/physiology |
| Abstract |
We examined how the brain organizes interrelated facts during learning and how the facts are subsequently manipulated in a transitive inference (TI) paradigm (e.g., if A<B and B<C, then A<C). This task determined features such as learned facts and behavioral goals, but the learned facts could be organized in any of several ways. For example, if one learns a list by operating on paired items, the pairs may be stored individually as separate facts and reaction time (RT) should decrease with learning. Alternatively, the pairs may be stored as a single, unified list, which may yield a different RT pattern. We characterized RT patterns that occurred as participants learned, by trial and error, the predetermined order of 11 shapes. The task goal was to choose the shape occurring closer to the end of the list, and feedback about correctness was provided during this phase. RT increased even as its variance decreased during learning, suggesting that the learnt knowledge became progressively unified into a single representation, requiring more time to manipulate as participants acquired relational knowledge. After learning, non-adjacent (NA) list items were presented to examine how participants reasoned in a TI task. The task goal also required choosing from each presented pair the item occurring closer to the list end, but without feedback. Participants could solve the TI problems by applying formal logic to the previously learnt pairs of adjacent items; alternatively, they could manipulate a single, unified representation of the list. Shorter RT occurred for NA pairs having more intervening items, supporting the hypothesis that humans employ unified mental representations during TI. The response pattern does not support mental logic solutions of applying inference rules sequentially, which would predict longer RT with more intervening items. We conclude that the brain organizes information in such a way that reflects the relations among the items, even if the facts were learned in an arbitrary order, and that this representation is subsequently used to make inferences. |
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Department of Neuroscience, Box 1953, Brown Medical School, Providence, RI 02912, USA |
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0014-4819 |
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PMID:12192572 |
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refbase @ user @ |
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602 |
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