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Author |
Horowitz, A.C. |
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Title |
Do humans ape? Or do apes human? Imitation and intention in humans (Homo sapiens) and other animals |
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Journal Article |
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Year |
2003 |
Publication |
Journal of comparative psychology |
Abbreviated Journal |
J Comp Psychol |
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Volume |
117 |
Issue |
3 |
Pages |
325-336 |
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Keywords |
Adolescent; Adult; Animals; *Appetitive Behavior; Attention; Child, Preschool; Concept Formation; Female; Humans; *Imitative Behavior; Male; Motivation; Pan troglodytes/*psychology; *Problem Solving; *Psychomotor Performance; Reaction Time; Species Specificity |
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Abstract |
A. Whiten, D. M. Custance, J.-C. Gomez, P. Teixidor, and K. A. Bard (1996) tested chimpanzees' (Pan troglodytes) and human children's (Homo sapiens) skills at imitation with a 2-action test on an “artificial fruit.” Chimpanzees imitated to a restricted degree; children were more thoroughly imitative. Such results prompted some to assert that the difference in imitation indicates a difference in the subjects' understanding of the intentions of the demonstrator (M. Tomasello, 1996). In this experiment, 37 adult human subjects were tested with the artificial fruit. Far from being perfect imitators, the adults were less imitative than the children. These results cast doubt on the inference from imitative performance to an ability to understand others' intentions. The results also demonstrate how any test of imitation requires a control group and attention to the level of behavioral analysis. |
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Department of Cognitive Science, University of California, San Diego, CA, USA. ahorowitz@crl.ucsd.edu |
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Washington, D.C. : 1983 |
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English |
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0735-7036 |
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PMID:14498809 |
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yes |
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Call Number |
refbase @ user @ |
Serial |
736 |
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Author |
Hostetter, A.B.; Cantero, M.; Hopkins, W.D. |
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Title |
Differential use of vocal and gestural communication by chimpanzees (Pan troglodytes) in response to the attentional status of a human (Homo sapiens) |
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Journal Article |
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Year |
2001 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
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Volume |
115 |
Issue |
4 |
Pages |
337-343 |
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Keywords |
Animals; *Attention; *Communication Methods, Total; Female; *Gestures; Humans; Male; Motivation; Pan troglodytes/*psychology; Social Environment; Species Specificity; *Vocalization, Animal |
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Abstract |
This study examined the communicative behavior of 49 captive chimpanzees (Pan troglodytes), particularly their use of vocalizations, manual gestures, and other auditory- or tactile-based behaviors as a means of gaining an inattentive audience's attention. A human (Homo sapiens) experimenter held a banana while oriented either toward or away from the chimpanzee. The chimpanzees' behavior was recorded for 60 s. Chimpanzees emitted vocalizations faster and were more likely to produce vocalizations as their 1st communicative behavior when a human was oriented away from them. Chimpanzees used manual gestures more frequently and faster when the human was oriented toward them. These results replicate the findings of earlier studies on chimpanzee gestural communication and provide new information about the intentional and functional use of their vocalizations. |
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Department of Psychology, Berry College, USA |
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0735-7036 |
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PMID:11824896 |
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yes |
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Call Number |
Equine Behaviour @ team @ |
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4970 |
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Author |
Reimers, M.; Schwarzenberger, F.; Preuschoft, S. |
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Title |
Rehabilitation of research chimpanzees: stress and coping after long-term isolation |
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Journal Article |
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Year |
2007 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
Horm Behav |
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Volume |
51 |
Issue |
3 |
Pages |
428-435 |
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Keywords |
Adaptation, Psychological/*physiology; Animals; *Animals, Laboratory; Exploratory Behavior; Hydrocortisone/analysis/metabolism; Male; Models, Biological; *Pan troglodytes; Social Dominance; Social Environment; *Social Isolation/psychology; Stress/*rehabilitation/veterinary; Time |
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We report on the permanent retirement of chimpanzees from biomedical research and on resocialization after long-term social isolation. Our aim was to investigate to what extent behavioral and endocrine measures of stress in deprived laboratory chimpanzees can be improved by a more species-typical social life style. Personality in terms of novelty responses, social dominance after resocialization and hormonal stress susceptibility were affected by the onset of maternal separation of infant chimpanzees and duration of deprivation. Chimpanzees, who were separated from their mothers at a younger age and kept in isolation for more years appeared to be more timid personalities, less socially active, less dominant and more susceptible to stress, as compared to chimpanzees with a less severe deprivation history. However, permanent retirement from biomedical research in combination with therapeutic resocialization maximizing chimpanzees' situation control resulted in reduced fecal cortisol metabolite levels. Our results indicate that chimpanzees can recover from severe social deprivation, and may experience resocialization as less stressful than solitary housing. |
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Department of Natural Sciences, Institute of Biochemistry, University of Veterinary Medicine, Veterinarplatz 1, 1210 Vienna, Austria. reimers@wild-vet.at |
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0018-506X |
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Notes |
PMID:17292368 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4188 |
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Author |
Noë, R.; de Waal, F.B.; van Hooff, J.A. |
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Title |
Types of dominance in a chimpanzee colony |
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Journal Article |
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Year |
1980 |
Publication |
Folia primatologica; international journal of primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
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Volume |
34 |
Issue |
1-2 |
Pages |
90-110 |
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Keywords |
Agonistic Behavior; Animals; Animals, Zoo; *Behavior, Animal; Competitive Behavior; Factor Analysis, Statistical; Female; Hierarchy, Social; Male; *Pan troglodytes; *Social Dominance |
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This study examines to what extent the concept of dominance can be used to describe the social structure of a group of semi-free-living chimpanzees. 15 behavioural variables, based on agonistic, competitive and affinitive behaviour patterns, have been compared with respect to the interindividual directions in which they occurred. In this analysis use was made of indices that reflect the position an individual occupies in the relationship structure. These indices were calculated per individual for all variables and subjected to factor analysis and cluster analysis. As a result, 13 of the variables could be grouped in three categories which have been labelled: (1) agonistic dominance; (2) bluff dominance, and (3) competitive dominance. Whereas the top positions in the hierarchies based on the first two closely related types of dominance were occupied by the adult males, the hierarchy based on the third type was headed by several adult females. |
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0015-5713 |
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Notes |
PMID:7439873 |
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no |
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Call Number |
refbase @ user @ |
Serial |
212 |
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Author |
Rumbaugh, D.M.; Riesen, A.H.; Wright, S.C. |
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Title |
Creative responsiveness to objects: a report of a pilot study with young apes |
Type |
Journal Article |
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Year |
1972 |
Publication |
Folia Primatologica; International Journal of Primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
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Volume |
17 |
Issue |
5 |
Pages |
397-403 |
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Keywords |
Animals; *Creativeness; *Hominidae; Pan troglodytes; Play and Playthings; *Problem Solving |
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0015-5713 |
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PMID:5082622 |
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Call Number |
Equine Behaviour @ team @ |
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4183 |
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Author |
Menzel, E.W.J. |
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Title |
Communication about the environment in a group of young chimpanzees |
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Journal Article |
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Year |
1971 |
Publication |
Folia Primatologica; International Journal of Primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
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Volume |
15 |
Issue |
3 |
Pages |
220-232 |
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Keywords |
*Animal Communication; Animals; Environment; Fear; Leadership; *Pan troglodytes; Problem Solving; Social Behavior; Species Specificity; Vocalization, Animal |
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0015-5713 |
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PMID:5120654 |
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no |
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Equine Behaviour @ team @ |
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4184 |
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Author |
Byrne, R.W.; Bates, L.A. |
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Title |
Why are animals cognitive? |
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Journal Article |
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Year |
2006 |
Publication |
Current Biology : CB |
Abbreviated Journal |
Curr Biol |
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16 |
Issue |
12 |
Pages |
R445-8 |
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Animals; Arachnida/physiology; *Association Learning; *Behavior, Animal; *Cognition; Cooperative Behavior; Falconiformes/physiology; Pan troglodytes/physiology; Parrots/physiology; Passeriformes/physiology |
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Centre for Social Learning and Cognitive Evolution, and Scottish Primate Research Group, School of Psychology, University of St Andrews, Fife KY16 9JP, Scotland |
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0960-9822 |
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Notes |
PMID:16781995 |
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no |
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Call Number |
Equine Behaviour @ team @ |
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4708 |
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Author |
Shoshani, J.; Kupsky, W.J.; Marchant, G.H. |
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Title |
Elephant brain. Part I: gross morphology, functions, comparative anatomy, and evolution |
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Journal Article |
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Year |
2006 |
Publication |
Brain Research Bulletin |
Abbreviated Journal |
Brain Res Bull |
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70 |
Issue |
2 |
Pages |
124-157 |
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Keywords |
Animals; Brain/*anatomy & histology/blood supply/*physiology; Cats; Chinchilla; Elephants/*anatomy & histology/*physiology; Equidae; *Evolution; Female; Guinea Pigs; Haplorhini; Humans; Hyraxes; Male; Pan troglodytes; Sheep; Wolves |
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We report morphological data on brains of four African, Loxodonta africana, and three Asian elephants, Elephas maximus, and compare findings to literature. Brains exhibit a gyral pattern more complex and with more numerous gyri than in primates, humans included, and in carnivores, but less complex than in cetaceans. Cerebral frontal, parietal, temporal, limbic, and insular lobes are well developed, whereas the occipital lobe is relatively small. The insula is not as opercularized as in man. The temporal lobe is disproportionately large and expands laterally. Humans and elephants have three parallel temporal gyri: superior, middle, and inferior. Hippocampal sizes in elephants and humans are comparable, but proportionally smaller in elephant. A possible carotid rete was observed at the base of the brain. Brain size appears to be related to body size, ecology, sociality, and longevity. Elephant adult brain averages 4783 g, the largest among living and extinct terrestrial mammals; elephant neonate brain averages 50% of its adult brain weight (25% in humans). Cerebellar weight averages 18.6% of brain (1.8 times larger than in humans). During evolution, encephalization quotient has increased by 10-fold (0.2 for extinct Moeritherium, approximately 2.0 for extant elephants). We present 20 figures of the elephant brain, 16 of which contain new material. Similarities between human and elephant brains could be due to convergent evolution; both display mosaic characters and are highly derived mammals. Humans and elephants use and make tools and show a range of complex learning skills and behaviors. In elephants, the large amount of cerebral cortex, especially in the temporal lobe, and the well-developed olfactory system, structures associated with complex learning and behavioral functions in humans, may provide the substrate for such complex skills and behavior. |
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Department of Biology, University of Asmara, P.O. Box 1220, Asmara, Eritrea (Horn of Africa). hezy@bio.uoa.edu.er |
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0361-9230 |
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PMID:16782503 |
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no |
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Equine Behaviour @ team @ |
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2623 |
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Author |
Morton, D.B. |
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Title |
Self-consciousness and animal suffering |
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Journal Article |
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Year |
2000 |
Publication |
Biologist (London, England) |
Abbreviated Journal |
Biologist (London) |
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Volume |
47 |
Issue |
2 |
Pages |
77-80 |
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Keywords |
Animal Population Groups/*psychology; Animal Welfare/*standards; Animals; Behavior, Animal; *Consciousness; Dogs; *Ego; Horses/psychology; Pain/psychology/*veterinary; Pan troglodytes/psychology; Parrots; Pongo pygmaeus/psychology; Self Concept |
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Animals with relatively highly developed brains are likely to experience some degree of self-awareness and the ability to think. As well as being interesting in its own right, self-consciousness matters from an ethical point of view, since it can give rise to forms of suffering above and beyond the immediate physical sensations of pain or distress. This article surveys the evidence for animal self-consciousness and its implications for animal welfare. |
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Division of Primary Care, Public and Occupational Health, School of Medicine, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK. d.b.morton@bham.ac.uk |
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0006-3347 |
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PMID:11190233 |
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no |
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refbase @ user @ |
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618 |
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Author |
Dunbar, R.I.M.; McAdam, M.R.; O'connell, S. |
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Title |
Mental rehearsal in great apes (Pan troglodytes and Pongo pygmaeus) and children |
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Journal Article |
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Year |
2005 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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Volume |
69 |
Issue |
3 |
Pages |
323-330 |
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Keywords |
Algorithms; Animals; Child; Child, Preschool; Food; Frontal Lobe/anatomy & histology/physiology; Humans; *Imagination; Pan troglodytes; Pongo pygmaeus; Problem Solving/*physiology; Psychomotor Performance/physiology; Reward |
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The ability to rehearse possible future courses of action in the mind is an important feature of advanced social cognition in humans, and the “social brain” hypothesis implies that it might also be a feature of primate social cognition. We tested two chimpanzees, six orangutans and 63 children aged 3-7 years on a set of four puzzle boxes, half of which were presented with an opportunity to observe the box before being allowed to open it (“prior view”), the others being given without an opportunity to examine the boxes before handling them (“no prior view”). When learning effects are partialled out, puzzle boxes in the “prior view” condition were opened significantly faster than boxes given in the “no prior view” condition by the children, but not by either of the great apes. The three species differ significantly in the speed with which they opened boxes in the “no prior view” condition. The three species' performance on this task was a function of relative frontal lobe volume, suggesting that it may be possible to identify quantitative neuropsychological differences between species. |
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Evolutionary Psychology Research Group, School of Biological Sciences, University of Liverpool, Biosciences Building, Crown Street, Liverpool L69 7ZB, UK. rimd@liv.ac.uk |
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0376-6357 |
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PMID:15896530 |
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2097 |
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