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Author Young, H.P.
Title The dynamics of social innovation Type Journal Article
Year 2011 Publication Proceedings of the National Academy of Sciences Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.
Volume 108 Issue (down) Supplement 4 Pages 21285-21291
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Notes 10.1073/pnas.1100973108 Approved no
Call Number Equine Behaviour @ team @ Serial 5940
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Author Gorodnichenko, Y.; Roland, G.
Title Individualism, innovation, and long-run growth Type Journal Article
Year 2011 Publication Proceedings of the National Academy of Sciences Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.
Volume 108 Issue (down) Supplement 4 Pages 21316-21319
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Notes 10.1073/pnas.1101933108 Approved no
Call Number Equine Behaviour @ team @ Serial 5941
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Author Bergstrom, C.T.; Lachmann, M.
Title Signaling among relatives. III. Talk is cheap Type Journal Article
Year 1998 Publication Proceedings of the National Academy of Sciences of the United States of America Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.
Volume 95 Issue (down) 9 Pages 5100-5105
Keywords Animal Communication; Animals; Costs and Cost Analysis; *Evolution; Interpersonal Relations; Models, Biological
Abstract The Sir Philip Sidney game has been used by numerous authors to show how signal cost can facilitate honest signaling among relatives. Here, we demonstrate that, in this game, honest cost-free signals are possible as well, under very general conditions. Moreover, these cost-free signals are better for all participants than the previously explored alternatives. Recent empirical evidence suggests that begging is energetically inexpensive for nestling birds; this finding led some researchers to question the applicability of the costly signaling framework to nestling begging. Our results show that cost-free or inexpensive signals, as observed empirically, fall within the framework of signaling theory.
Address Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA. carl@charles.stanford.edu
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Notes PMID:9560235 Approved no
Call Number refbase @ user @ Serial 561
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Author Griffin, D.R.
Title Animals know more than we used to think Type
Year 2001 Publication Proceedings of the National Academy of Sciences of the United States of America Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.
Volume 98 Issue (down) 9 Pages 4833-4834
Keywords Animal Communication; Animals; Attention/physiology; Brain/physiology; Choice Behavior/physiology; Cognition/*physiology; Humans; Macaca mulatta/physiology/*psychology; Memory/*physiology; Optic Disk/physiology; Psychological Tests
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Notes PMID:11320232 Approved no
Call Number Equine Behaviour @ team @ Serial 2823
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Author Hampton, R.R.
Title Rhesus monkeys know when they remember Type Journal Article
Year 2001 Publication Proceedings of the National Academy of Sciences of the United States of America Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.
Volume 98 Issue (down) 9 Pages 5359-5362
Keywords Animals; Choice Behavior/physiology; Cognition/*physiology; Cues; Food Preferences/psychology; Macaca mulatta/*physiology/*psychology; Male; Memory/*physiology; Probability; Psychological Tests; Reproducibility of Results; Sensitivity and Specificity
Abstract Humans are consciously aware of some memories and can make verbal reports about these memories. Other memories cannot be brought to consciousness, even though they influence behavior. This conspicuous difference in access to memories is central in taxonomies of human memory systems but has been difficult to document in animal studies, suggesting that some forms of memory may be unique to humans. Here I show that rhesus macaque monkeys can report the presence or absence of memory. Although it is probably impossible to document subjective, conscious properties of memory in nonverbal animals, this result objectively demonstrates an important functional parallel with human conscious memory. Animals able to discern the presence and absence of memory should improve accuracy if allowed to decline memory tests when they have forgotten, and should decline tests most frequently when memory is attenuated experimentally. One of two monkeys examined unequivocally met these criteria under all test conditions, whereas the second monkey met them in all but one case. Probe tests were used to rule out “cueing” by a wide variety of environmental and behavioral stimuli, leaving detection of the absence of memory per se as the most likely mechanism underlying the monkeys' abilities to selectively decline memory tests when they had forgotten.
Address Section on the Neurobiology of Learning and Memory, Laboratory of Neuropsychology, National Institute of Mental Health, Building 49, Room 1B-80, Bethesda, MD 20892, USA. robert@ln.nimh.nih.gov
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Notes PMID:11274360 Approved no
Call Number Equine Behaviour @ team @ Serial 2824
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Author Chase, I.D.; Tovey, C.; Spangler-Martin, D.; Manfredonia, M.
Title Individual differences versus social dynamics in the formation of animal dominance hierarchies Type Journal Article
Year 2002 Publication Proceedings of the National Academy of Sciences of the United States of America Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.
Volume 99 Issue (down) 8 Pages 5744-5749
Keywords Animals; *Behavior, Animal; Fishes; Humans; *Social Behavior; *Social Dominance
Abstract Linear hierarchies, the classical pecking-order structures, are formed readily in both nature and the laboratory in a great range of species including humans. However, the probability of getting linear structures by chance alone is quite low. In this paper we investigate the two hypotheses that are proposed most often to explain linear hierarchies: they are predetermined by differences in the attributes of animals, or they are produced by the dynamics of social interaction, i.e., they are self-organizing. We evaluate these hypotheses using cichlid fish as model animals, and although differences in attributes play a significant part, we find that social interaction is necessary for high proportions of groups with linear hierarchies. Our results suggest that dominance hierarchy formation is a much richer and more complex phenomenon than previously thought, and we explore the implications of these results for evolutionary biology, the social sciences, and the use of animal models in understanding human social organization.
Address Department of Sociology, State University of New York, Stony Brook, NY 11794-4356, USA. Ichase@notes.cc.sunysb.edu
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Notes PMID:11960030 Approved no
Call Number refbase @ user @ Serial 442
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Author Seyfarth, R.M.; Cheney, D.L.
Title What are big brains for? Type Journal Article
Year 2002 Publication Proceedings of the National Academy of Sciences of the United States of America Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.
Volume 99 Issue (down) 7 Pages 4141-4142
Keywords Animals; Brain/*anatomy & histology; *Intelligence; Learning; Primates/*anatomy & histology/*psychology; Social Behavior
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Address Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA. seyfarth@psych.upenn.edu
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Notes PMID:11929989 Approved no
Call Number refbase @ user @ Serial 692
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Author Reader, S.M.; Laland, K.N.
Title Social intelligence, innovation, and enhanced brain size in primates Type Journal Article
Year 2002 Publication Proceedings of the National Academy of Sciences of the United States of America Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.
Volume 99 Issue (down) 7 Pages 4436-4441
Keywords Animals; Brain/*anatomy & histology; Evolution; *Intelligence; Learning; Primates/*anatomy & histology/*psychology; Social Behavior
Abstract Despite considerable current interest in the evolution of intelligence, the intuitively appealing notion that brain volume and “intelligence” are linked remains untested. Here, we use ecologically relevant measures of cognitive ability, the reported incidence of behavioral innovation, social learning, and tool use, to show that brain size and cognitive capacity are indeed correlated. A comparative analysis of 533 instances of innovation, 445 observations of social learning, and 607 episodes of tool use established that social learning, innovation, and tool use frequencies are positively correlated with species' relative and absolute “executive” brain volumes, after controlling for phylogeny and research effort. Moreover, innovation and social learning frequencies covary across species, in conflict with the view that there is an evolutionary tradeoff between reliance on individual experience and social cues. These findings provide an empirical link between behavioral innovation, social learning capacities, and brain size in mammals. The ability to learn from others, invent new behaviors, and use tools may have played pivotal roles in primate brain evolution.
Address Department of Zoology, University of Cambridge, High Street, Madingley, Cambridge CB3 8AA, United Kingdom
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Notes PMID:11891325 Approved no
Call Number Serial 2149
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Author Hoy, R.
Title Animal awareness: The (un)binding of multisensory cues in decision making by animals Type Journal Article
Year 2005 Publication Proceedings of the National Academy of Sciences of the United States of America Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.
Volume 102 Issue (down) 7 Pages 2267-2268
Keywords Animals; Anura/physiology; *Awareness; *Behavior, Animal; Decision Making; Female; Male; Perception; Sensation
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Address Department of Neurobiology and Behavior, 215 Mudd Hall, Cornell University, Ithaca, NY 14850, USA. rrh3@cornell.edu
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Notes PMID:15703288 Approved no
Call Number Equine Behaviour @ team @ Serial 2821
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Author Harvey, P.H.; Clutton-Brock, T.H.; Mace, G.M.
Title Brain size and ecology in small mammals and primates Type Journal Article
Year 1980 Publication Proceedings of the National Academy of Sciences Abbreviated Journal PNAS
Volume 77 Issue (down) 7 Pages 4387-4389
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 5456
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