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| Author |
Povinelli DJ; Dunphy-Lelii S |
| Title |
Do chimpanzees seek explanations? Preliminary comparative investigations |
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Journal Article |
| Year |
2001 |
Publication |
Can. J. Exp. Psychol. |
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55 |
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Pages |
185 |
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Equine Behaviour @ team @ |
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3071 |
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| Author |
Schwartz, B.L.; Evans, S. |
| Title |
Episodic memory in primates |
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Journal Article |
| Year |
2001 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
| Volume |
55 |
Issue |
2 |
Pages |
71-85 |
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Animals; Behavior, Animal; *Discrimination Learning; Hominidae/*psychology; Humans; *Memory; Self Concept |
| Abstract |
Episodic memory refers to a system of memory with the capacity to recollect specific events from an individual's life. Some psychologists have suggested that episodic memory is a uniquely human phenomenon. We challenge that idea and present evidence that great apes and other primates may possess episodic-like memory. We review criteria developed to assess episodic-like memory in nonhumans, and how they apply to primates. In particular, we discuss the criteria of Clayton et al. [2001], who stated that episodic-like memory is based on the retrieval of multiple and integrated components of an event. We then review eight studies examining memory in great apes and apply the Clayton et al. criteria to each of them. We summarize the evidence that is compatible with the existence of episodic-like memory, although none of the data completely satisfy the Clayton et al. criteria. Morover, feelings of pastness and feelings of confidence, which mark episodic memory in humans, have not been empirically addressed in nonhuman primates. Future studies should be directed at these aspects of memory in primates. We speculate on the functional significance of episodic memory in nonhuman primates. |
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Dept of Psychology, Florida International University, Miami, Florida 33199, USA. SchwartB@fiu.edu |
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0275-2565 |
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PMID:11668526 |
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no |
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Equine Behaviour @ team @ |
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4115 |
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| Author |
Zentall, T.R. |
| Title |
The case for a cognitive approach to animal learning and behavior |
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Journal Article |
| Year |
2001 |
Publication |
Behavioral Processes |
Abbreviated Journal |
Behav Processes |
| Volume |
54 |
Issue |
1-3 |
Pages |
65-78 |
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The dangers of hypothesizing about unobservable cognitive mechanisms are well known to behavior analysts. I propose, however, that carefully fashioned cognitive theories that make predictions that are inconsistent with current behavioral theories can provide useful research tools for the understanding of behavior. Furthermore, even if the results of such research may be accommodated by modifying existing behavioral theories, our understanding of behavior is often advanced by the empirical findings because it is unlikely that the research would have been conducted in the absence of such cognitive hypothesizing. Two examples of the development of emergent relations are described: The first deals with the nature of a pigeon's 'representation' of two stimuli both of which are associated with correct responding to a third in a many-to-one matching task (stimulus equivalence or common representations). The second has to do with transitive inference, the emergent relation between two stimuli mediated by their relation to a common stimulus in a simultaneous discrimination. |
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Department of Psychology, University of Kentucky, 40506-0044, Lexington, KY, USA |
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English |
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0376-6357 |
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PMID:11369461 |
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25 |
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| Author |
Pearce JM; Bouton ME |
| Title |
Theories of associative learning in animals |
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Journal Article |
| Year |
2001 |
Publication |
Annu. Rev. Psychol. |
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52 |
Issue |
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Pages |
111 |
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Equine Behaviour @ team @ |
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3070 |
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| Author |
Zuberbühler, K. |
| Title |
Predator-specific alarm calls in Campbell's monkeys, Cercopithecus campbelli |
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Journal Article |
| Year |
2001 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
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50 |
Issue |
5 |
Pages |
414-422 |
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One of the most prominent behavioural features of many forest primates are the loud calls given by the adult males. Early observational studies repeatedly postulated that these calls function in intragroup spacing or intergroup avoidance. More recent field experiments with Diana monkeys (Cercopithecus diana) of Taï Forest, Ivory Coast, have clearly shown that loud male calls function as predator alarm calls because calls reliably (1) label different predator classes and (2) convey semantic information about the predator type present. Here, I test the alarm call hypothesis another primate, the Campbell's monkey (C. campbelli). Like Diana monkeys, male Campbell's monkeys produce conspicuous loud calls to crowned hawk eagles (Stephanoaetus coronatus) and leopards (Panthera pardus), two of their main predators. Playback experiments showed that monkeys responded to the predator category represented by the different playback stimuli, regardless of whether they consisted of (1) vocalisations of the actual predators (crowned hawk eagle shrieks or leopard growls), (2) alarm calls to crowned hawk eagles or leopards given by other male Campbell's monkeys or (3) alarm calls to crowned hawk eagles or leopards given by sympatric male Diana monkeys. These experiments provide further evidence that non-human primates have evolved the cognitive capacity to produce and respond to referential labels for external events. |
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Equine Behaviour @ team @ |
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3116 |
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| Author |
Fleurance,Géraldine; Duncan ,Patrick; Mallevaud, Bruno |
| Title |
Daily intake and the selection of feeding sites by horses in heterogeneous wet grasslands |
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Journal Article |
| Year |
2001 |
Publication |
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Abbreviated Journal |
Anim. Res. |
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50 |
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149-156 |
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horse / intake / grassland / heterogeneity / wetland cheval / ingestion / prairie / hétérogénéité / zone humide |
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In spite of the importance of grazed forage in horse nutrition, little information is available on their daily intake at pasture. We determined the intake of 4 non-breeding mares of a heavy breed (average body weight = 674 kg), grazing during the summer in heterogeneous natural grasslands of the Marais Poitevin (France), an internationally important wetland where grazing is an essential process which maintains biodiversity. The mares ate large quantities of forage (21.9 $pm$ 2.4 kg of organic matter per day, i.e. 166.2 $pm$ 20.8 g of organic matter per kg LW0.75 per day) in comparison with previous published values and with the estimated requirements of these horses. The use of the vegetation was very selective, the mares spent about 70% of their feeding time on short grass lawns (sward surface $leq$ 4 cm, biomass < 100 g$cdot$m-2), that represented only 10% of the area. This behaviour maintained the plants at young growing stages which are of better quality than ungrazed plants. These results are discussed in relation to the dynamics of the plant communities. |
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horse / intake / grassland / heterogeneity / wetland |
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Equine Behaviour @ team @ |
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4238 |
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Seyfarth, R.M.; Cheney, D.L. |
| Title |
Cognitive strategies and the representation of social relations by monkeys |
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Journal Article |
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2001 |
Publication |
Nebraska Symposium on Motivation. Nebraska Symposium on Motivation |
Abbreviated Journal |
Nebr Symp Motiv |
| Volume |
47 |
Issue |
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Pages |
145-177 |
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Adaptation, Biological; Animals; *Evolution; Family; Female; Haplorhini; Male; Memory; Primates; *Selection (Genetics); *Social Behavior; Social Dominance; *Social Perception |
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University of Pennsylvania, USA |
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0146-7875 |
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PMID:11759347 |
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no |
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refbase @ user @ |
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345 |
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Bahloul, K.; Pereladova, O.B.; Soldatova, N.; Fisenko, G.; Sidorenko, E.; Sempere, A.J. |
| Title |
Social organization and dispersion of introduced kulans (Equus hemionus kulan) and Przewalski horses (Equus przewalski) in the Bukhara Reserve, Uzbekistan |
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Journal Article |
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2001 |
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Journal of Arid Environments |
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J. Arid. Environ. |
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47 |
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3 |
Pages |
309-323 |
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Przewalski horses; kulans; Central Asia; home range; behaviour |
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Asiatic wild asses and Przewalski horses initially inhabited steppe, semi-desert and desert areas, but Przewalski horses became extinct in the wild, and kulans disappeared at the beginning of the 20th century, except for a small population in Turkmenistan. The Bukhara Breeding Centre (Uzbekistan) was created in 1976 for reintroduction and conservation of wild ungulate species. In 1977-1978, five kulans (two males and three females), from Barsa-Kelmes island on the Aral sea, were introduced into the reserve. The group increased to 25-30 animals in 1989-1990, when eight Przewalski horses from Moscow and St Petersburg zoos were introduced. We analysed the home ranges, preferred habitats and social interactions of these closely related species during 1995-1998 by seasonal and group composition. Horses and asses formed a reproductive group and a secondary non-reproductive group. The home range of the secondary group was larger than the reproductive group and seemed to be less dependent from the watering places. Przewalski horses were less adapted to semi-desert conditions (both water and vegetation needs) than kulan. |
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refbase @ user @ |
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777 |
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Harris, L.J.; Almerigi, J.B.; Carbary, T.J.; Fogel, T.G. |
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Left-side infant holding: A test of the hemispheric arousal -attentional hypothesis |
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Journal Article |
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2001 |
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Brain and Cognition |
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46 |
Issue |
1-2 |
Pages |
159-165 |
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When asked to hold a young infant in their arms, most adults hold on the left side (Harris, 1997). In a prior study, we found the same bias when we asked adults merely to imagine holding an infant in their arms (Harris, Almerigi, & Kirsch, 1999). It has been hypothesized that the left-side bias is the product of right-hemisphere arousal accompanying certain aspects of the act, causing attention to be driven to the contralateral, or left, side of personal space. Left-side holding, whether actual or imagined, thus would be consistent with the direction to which the holder's attention has been endogenously directed. We tested this hypothesis by giving 250 college students the “imagine-holding” task and then, as an independent measure of lateralized hemispheric arousal, a 34-item Chimeric Faces Test (CFT). On the “imagine” test, a significant majority reported a left-side hold, and, on the CFT, left-side holders had a significantly stronger left-hemispace bias than right-side holders, although both left- and right- side holders had left-hemispace CFT biases. The results thus support the attentional-arousal hypothesis but indicate that other factors are contributing as well. |
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0278-2626 |
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Equine Behaviour @ team @ |
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5344 |
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Cordeiro de Sousa, M.; Xavier, N.; Alves da Silva, H.; Souza de Oliveira, M.; Yamamoto, M. |
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Hand preference study in marmosets ( Callithrix jacchus ) using food reaching tests |
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Journal Article |
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2001 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
42 |
Issue |
1 |
Pages |
57-66 |
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Abstract Hand preference has been investigated in New World primates but the data obtained thus far are controversial. In this study we investigated hand preference in common marmosets,Callithrix jacchus, during the execution of a reaching for food task. We used 46 adult common marmoset males (n=27) and females (n=19) from the Universidade of Rio Grande do Norte colony, both wild and captive-born. To test the hand preference we used a device measuring 10 cm2, with a central hole 1 cm in diameter, to force the animal to use only one hand to reach for food on a food dish located underneath. Each animal was tested 5 times and had to make a maximum of 20 successful attempts per session. A total of 100 successful attempts per animal and 4,600 successful attempts for all animals were recorded during the experiment. Latency and duration of the sessions were measured and we found preference for the use of one of the hands in common marmoset individuals, i.e. 45 of total of 46 animals used significantly more the right or the left hand when performing the task. However no bias at the population level was found. Females born in captivity presented an increase in the duration of latency for the first successful attempt and in the total duration of the test sessions. These findings might be indicating differences associated with a natural tendency for females to be more selective and to spend more time exploring alimentary sources. Additionally, captive-born females may have a constrain in developing cognitive abilities regarding foraging since they have food available during most part of the time. |
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Equine Behaviour @ team @ |
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3149 |
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