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Author |
Dunbar, R.I.M.; Shultz, S. |
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Title |
Evolution in the Social Brain |
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2007 |
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Science |
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Science |
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317 |
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5843 |
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1344-1347 |
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The evolution of unusually large brains in some groups of animals, notably primates, has long been a puzzle. Although early explanations tended to emphasize the brain's role in sensory or technical competence (foraging skills, innovations, and way-finding), the balance of evidence now clearly favors the suggestion that it was the computational demands of living in large, complex societies that selected for large brains. However, recent analyses suggest that it may have been the particular demands of the more intense forms of pairbonding that was the critical factor that triggered this evolutionary development. This may explain why primate sociality seems to be so different from that found in most other birds and mammals: Primate sociality is based on bonded relationships of a kind that are found only in pairbonds in other taxa. |
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Equine Behaviour @ team @ |
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4243 |
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Schiffman, S.S. |
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Livestock odors: implications for human health and well-being |
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1998 |
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Journal of Animal Science |
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J. Anim Sci. |
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76 |
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5 |
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1343-1355 |
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N1 - |
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Equine Behaviour @ team @ |
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2949 |
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Ash, C.; Chin, G.; Pennisi, E.; Sugden, A. |
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Title |
Living in Societies |
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2007 |
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Science |
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Science |
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317 |
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5843 |
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1337- |
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Equine Behaviour @ team @ |
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4246 |
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Outram, A.K.; Stear, N.A.; Bendrey, R.; Olsen, S.; Kasparov, A.; Zaibert, V.; Thorpe, N.; Evershed, R.P. |
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Title |
The Earliest Horse Harnessing and Milking |
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2009 |
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Science |
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323 |
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5919 |
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1332-1335 |
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Horse domestication revolutionized transport, communications, and warfare in prehistory, yet the identification of early domestication processes has been problematic. Here, we present three independent lines of evidence demonstrating domestication in the Eneolithic Botai Culture of Kazakhstan, dating to about 3500 B.C.E. Metrical analysis of horse metacarpals shows that Botai horses resemble Bronze Age domestic horses rather than Paleolithic wild horses from the same region. Pathological characteristics indicate that some Botai horses were bridled, perhaps ridden. Organic residue analysis, using δ13C and δD values of fatty acids, reveals processing of mare's milk and carcass products in ceramics, indicating a developed domestic economy encompassing secondary products. |
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Equine Behaviour @ team @ |
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6620 |
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Bugnyar, T.; Stöwe, M.; Heinrich, B. |
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Title |
Ravens, Corvus corax, follow gaze direction of humans around obstacles |
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2004 |
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Proceedings of the Royal Society B: Biological Sciences |
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Proc. Roy. Soc. Lond. B Biol. Sci. |
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271 |
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1546 |
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1331-1336 |
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The ability to follow gaze (i.e. head and eye direction) has recently been shown for social mammals, particularly primates. In most studies, individuals could use gaze direction as a behavioural cue without understanding that the view of others may be different from their own. Here, we show that hand–raised ravens not only visually co–orient with the look–ups of a human experimenter but also reposition themselves to follow the experimenter's gaze around a visual barrier. Birds were capable of visual co–orientation already as fledglings but consistently tracked gaze direction behind obstacles not before six months of age. These results raise the possibility that sub–adult and adult ravens can project a line of sight for the other person into the distance. To what extent ravens may attribute mental significance to the visual behaviour of others is discussed. |
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10.1098/rspb.2004.2738 |
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Equine Behaviour @ team @ |
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5009 |
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Author |
Jolly, A. |
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Title |
BEHAVIOR: The Social Origin of Mind |
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Journal Article |
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2007 |
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Science |
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Science |
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317 |
Issue |
5843 |
Pages |
1326-1327 |
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Equine Behaviour @ team @ |
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4247 |
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Pennisi, E. |
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Title |
PSYCHOLOGY: Nonhuman Primates Demonstrate Humanlike Reasoning |
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2007 |
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Science |
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317 |
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5843 |
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1308- |
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Equine Behaviour @ team @ |
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4240 |
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Author |
Joffe, T.H.; Dunbar, R.I. |
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Title |
Visual and socio-cognitive information processing in primate brain evolution |
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Journal Article |
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Year |
1997 |
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Proceedings. Biological Sciences / The Royal Society |
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Proc Biol Sci |
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264 |
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1386 |
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1303-1307 |
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Animals; Brain/anatomy & histology/*physiology; Cognition/physiology; *Evolution; Geniculate Bodies/anatomy & histology/physiology; Humans; Mental Processes/physiology; Neocortex/physiology; Primates/anatomy & histology/*physiology/*psychology; *Social Behavior; Visual Cortex/anatomy & histology/physiology |
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Social group size has been shown to correlate with neocortex size in primates. Here we use comparative analyses to show that social group size is independently correlated with the size of non-V1 neocortical areas, but not with other more proximate components of the visual system or with brain systems associated with emotional cueing (e.g. the amygdala). We argue that visual brain components serve as a social information 'input device' for socio-visual stimuli such as facial expressions, bodily gestures and visual status markers, while the non-visual neocortex serves as a 'processing device' whereby these social cues are encoded, interpreted and associated with stored information. However, the second appears to have greater overall importance because the size of the V1 visual area appears to reach an asymptotic size beyond which visual acuity and pattern recognition may not improve significantly. This is especially true of the great ape clade (including humans), that is known to use more sophisticated social cognitive strategies. |
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School of Life Sciences, University of Liverpool, UK |
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0962-8452 |
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PMID:9332015 |
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2095 |
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Author |
Warneken, F.; Tomasello, M. |
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Title |
Altruistic Helping in Human Infants and Young Chimpanzees |
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2006 |
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311 |
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5765 |
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1301-1303 |
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Human beings routinely help others to achieve their goals, even when the helper receives no immediate benefit and the person helped is a stranger. Such altruistic behaviors (toward non-kin) are extremely rare evolutionarily, with some theorists even proposing that they are uniquely human. Here we show that human children as young as 18 months of age (prelinguistic or just-linguistic) quite readily help others to achieve their goals in a variety of different situations. This requires both an understanding of others' goals and an altruistic motivation to help. In addition, we demonstrate similar though less robust skills and motivations in three young chimpanzees. |
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Equine Behaviour @ team @ |
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5607 |
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Author |
Fabrega, H.J. |
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Title |
Making sense of behavioral irregularities of great apes |
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2006 |
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Neuroscience and Biobehavioral Reviews |
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Neurosci Biobehav Rev |
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30 |
Issue |
8 |
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1260-73; discussion 1274-7 |
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Animals; Behavior/*physiology; Evolution; Hominidae/*physiology; Humans; Mental Disorders/*physiopathology; Neurosciences; *Psychopathology; Social Behavior |
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Psychopathology, mental illness, and psychiatric treatment are concepts relevant to modern medicine and medical psychology and replete with cumbersome intellectual and literary baggage. They bear the imprint of suppositions, world views, and general beliefs and values exemplified in the science, history, and general culture of Anglo European societies. The study in higher apes of phenomena addressed by such concepts raises conceptual dilemmas, usually termed speciesism and anthropomorphism, not unlike those encountered in comparative human studies of similar phenomena across cultures and historical periods, namely, ethnocentrism and anachronism. The authors' synthesis of literature and their analysis of the implications of higher ape psychopathology represent an epistemically compelling account that broadens the scope of the comparative study of behavioral irregularities, a topic that provides a different slant for examining challenging questions in evolutionary biology and primatology, such as cognition, self awareness, intentional behavior, culture and behavioral traditions, social intelligence, sickness and healing, and altruism. Theoretical and empirical study of this topic expands formulation and can help provide informative answers about human evolution as well as essential features of human psychiatric syndromes, with potential practical implications. The study of psychopathology of higher apes and other non human primates represents an appropriate focus for neuroscience and bio-behavioral sciences. |
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Department of Psychiatry and Anthropology, University of Pittsburgh, School of Medicine, 3811 Ohara Street, Pittsburgh, PA 15213, USA. hfabregajr@adelphia.net |
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0149-7634 |
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PMID:17079015 |
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Equine Behaviour @ team @ |
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2802 |
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