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Author |
Neiworth, J.J.; Hassett, J.M.; Sylvester, C.J. |
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Title |
Face processing in humans and new world monkeys: the influence of experiential and ecological factors |
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Journal Article |
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Year  |
2007 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
10 |
Issue |
2 |
Pages |
125-134 |
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Keywords |
Adolescent; Adult; Animals; Ecology; *Face; Female; Humans; Male; Pan troglodytes/*physiology; Species Specificity; Visual Perception/*physiology |
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Abstract |
This study tests whether the face-processing system of humans and a nonhuman primate species share characteristics that would allow for early and quick processing of socially salient stimuli: a sensitivity toward conspecific faces, a sensitivity toward highly practiced face stimuli, and an ability to generalize changes in the face that do not suggest a new identity, such as a face differently oriented. The look rates by adult tamarins and humans toward conspecific and other primate faces were examined to determine if these characteristics are shared. A visual paired comparison (VPC) task presented subjects with either a human face, chimpanzee face, tamarin face, or an object as a sample, and then a pair containing the previous stimulus and a novel stimulus was presented. The stimuli were either presented all in an upright orientation, or all in an inverted orientation. The novel stimulus in the pair was either an orientation change of the same face/object or a new example of the same type of face/object, and the stimuli were shown either in an upright orientation or in an inverted orientation. Preference to novelty scores revealed that humans attended most to novel individual human faces, and this effect decreased significantly if the stimuli were inverted. Tamarins showed preferential looking toward novel orientations of previously seen tamarin faces in the upright orientation, but not in an inverted orientation. Similarly, their preference to look longer at novel tamarin and human faces within the pair was reduced significantly with inverted stimuli. The results confirmed prior findings in humans that novel human faces generate more attention in the upright than in the inverted orientation. The monkeys also attended more to faces of conspecifics, but showed an inversion effect to orientation change in tamarin faces and to identity changes in tamarin and human faces. The results indicate configural processing restricted to particular kinds of primate faces by a New World monkey species, with configural processing influenced by life experience (human faces and tamarin faces) and specialized to process orientation changes specific to conspecific faces. |
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Department of Psychology, Carleton College, Northfield, MN 55057, USA. jneiwort@carleton.edu |
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English |
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1435-9448 |
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PMID:16909230 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2454 |
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Author |
Holekamp, K.E.; Sakai, S.T.; Lundrigan, B.L. |
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Title |
Social intelligence in the spotted hyena (Crocuta crocuta) |
Type |
Journal Article |
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Year |
2007 |
Publication |
Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences |
Abbreviated Journal |
Philos Trans R Soc Lond B Biol Sci |
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Volume |
362 |
Issue |
1480 |
Pages |
523-538 |
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Keywords |
Anatomy, Comparative; Animals; Brain/*anatomy & histology; Cercopithecinae/anatomy & histology/*physiology; Decision Making/physiology; Hyaenidae/anatomy & histology/*physiology; *Intelligence; *Recognition (Psychology); *Social Behavior; Species Specificity |
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Abstract |
If the large brains and great intelligence characteristic of primates were favoured by selection pressures associated with life in complex societies, then cognitive abilities and nervous systems with primate-like attributes should have evolved convergently in non-primate mammals living in large, elaborate societies in which social dexterity enhances individual fitness. The societies of spotted hyenas are remarkably like those of cercopithecine primates with respect to size, structure and patterns of competition and cooperation. These similarities set an ideal stage for comparative analysis of social intelligence and nervous system organization. As in cercopithecine primates, spotted hyenas use multiple sensory modalities to recognize their kin and other conspecifics as individuals, they recognize third-party kin and rank relationships among their clan mates, and they use this knowledge adaptively during social decision making. However, hyenas appear to rely more intensively than primates on social facilitation and simple rules of thumb in social decision making. No evidence to date suggests that hyenas are capable of true imitation. Finally, it appears that the gross anatomy of the brain in spotted hyenas might resemble that in primates with respect to expansion of frontal cortex, presumed to be involved in the mediation of social behaviour. |
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Department of Zoology, Michigan State University, East Lansing, MI 48824, USA. holekamp@msu.edu |
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0962-8436 |
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PMID:17289649 |
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Equine Behaviour @ team @ |
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4719 |
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Author |
Lemasson, A.; Koda, H.; Kato, A.; Oyakawa, C.; Blois-Heulin, C.; Masataka, N. |
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Title |
Influence of sound specificity and familiarity on Japanese macaques' (Macaca fuscata) auditory laterality |
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Journal Article |
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Year |
2010 |
Publication |
Behavioural Brain Research |
Abbreviated Journal |
Behav. Brain. Res. |
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208 |
Issue |
1 |
Pages |
286-289 |
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Keywords |
Auditory processing; Hemispheric specialisation; Specificity; Familiarity; Head-turn paradigm; Macaque |
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Despite attempts to generalise the left hemisphere-speech association of humans to animal communication, the debate remains open. More studies on primates are needed to explore the potential effects of sound specificity and familiarity. Familiar and non-familiar nonhuman primate contact calls, bird calls and non-biological sounds were broadcast to Japanese macaques. Macaques turned their heads preferentially towards the left (right hemisphere) when hearing conspecific or familiar primates supporting hemispheric specialisation. Our results support the role of experience in brain organisation and the importance of social factors to understand laterality evolution. |
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0166-4328 |
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Equine Behaviour @ team @ |
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5081 |
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