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Author Bergman, T.J.; Beehner, J.C.; Cheney, D.L.; Seyfarth, R.M. doi  openurl
  Title Hierarchical classification by rank and kinship in baboons Type Journal Article
  Year (up) 2003 Publication Science (New York, N.Y.) Abbreviated Journal Science  
  Volume 302 Issue 5648 Pages 1234-1236  
  Keywords Animals; Animals, Wild; Botswana; *Cognition; Family; Female; *Hierarchy, Social; Language; *Papio/psychology; Social Dominance; Vocalization, Animal  
  Abstract Humans routinely classify others according to both their individual attributes, such as social status or wealth, and membership in higher order groups, such as families or castes. They also recognize that people's individual attributes may be influenced and regulated by their group affiliations. It is not known whether such rule-governed, hierarchical classifications are specific to humans or might also occur in nonlinguistic species. Here we show that baboons recognize that a dominance hierarchy can be subdivided into family groups. In playback experiments, baboons respond more strongly to call sequences mimicking dominance rank reversals between families than within families, indicating that they classify others simultaneously according to both individual rank and kinship. The selective pressures imposed by complex societies may therefore have favored cognitive skills that constitute an evolutionary precursor to some components of human cognition.  
  Address Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA. thore@sas.upenn.edu  
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  ISSN 1095-9203 ISBN Medium  
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  Notes PMID:14615544 Approved no  
  Call Number refbase @ user @ Serial 689  
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Author Singh,M.; Singh,M.; Sharma, A. K.; Krishna B. A. openurl 
  Title Methodological considerations in measurement of dominance in primates Type Journal Article
  Year (up) 2003 Publication CURRENT SCIENCE Abbreviated Journal CURRENT SCIENCE  
  Volume 84 Issue 5 Pages 709-713  
  Keywords  
  Abstract The strength of dominance hierarchy in a group of

animals needs to be quantitatively measured since it

influences many other aspects of social interactions.

This article discusses three attempts made by previous

researchers to measure the strength of hierarchy. We

propose a method which attempts to rectify the lacunae

in the previous attempts. Data are used from a

group of Japanese macaques housed in a colony. A

method to calculate strength of hierarchy has been

illustrated and a procedure has been suggested to

normalize the dominance scores in order to place the

ranks of individuals on an interval scale.
 
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  Publisher Biopsychology Laboratory, Department of Psychology, University of Mysore, Mysore 570 006, India Place of Publication Editor  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2860  
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Author Silk, J.B.; Alberts, S.C.; Altmann, J. url  doi
openurl 
  Title Social Bonds of Female Baboons Enhance Infant Survival Type Journal Article
  Year (up) 2003 Publication Science Abbreviated Journal Science  
  Volume 302 Issue 5648 Pages 1231-1234  
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  Abstract Among nonhuman primates, females often form strong bonds with kin and other group members. These relationships are thought to have adaptive value for females, but direct effects of sociality on fitness have never been demonstrated. We present 16 years of behavioral data from a well-studied population of wild baboons, which demonstrate that sociality of adult females is positively associated with infant survival, an important component of variation in female lifetime fitness. The effects of sociality on infant survival are independent of the effects of dominance rank, group membership, and environmental conditions. Our results are consistent with the evidence that social support has beneficial effects on human health and well-being across the life span. For humans and other primates, sociality has adaptive value.  
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  Notes 10.1126/science.1088580 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5151  
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Author Bloom, P. doi  openurl
  Title Behavior. Can a dog learn a word? Type Journal Article
  Year (up) 2004 Publication Science (New York, N.Y.) Abbreviated Journal Science  
  Volume 304 Issue 5677 Pages 1605-1606  
  Keywords Animals; Child; Child, Preschool; *Dogs; Humans; *Learning; *Memory; *Vocabulary  
  Abstract  
  Address Department of Psychology, Yale University, Post Office Box 208205, New Haven, CT 06520-8205, USA. paul.bloom@yale.edu  
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  ISSN 1095-9203 ISBN Medium  
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  Notes PMID:15192205 Approved no  
  Call Number Serial 28  
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Author Danchin, E.; Giraldeau, L.-A.; Valone, T.J.; Wagner, R.H. doi  openurl
  Title Public information: from nosy neighbors to cultural evolution Type Journal Article
  Year (up) 2004 Publication Science (New York, N.Y.) Abbreviated Journal Science  
  Volume 305 Issue 5683 Pages 487-491  
  Keywords Animals; *Behavior, Animal; Cues; *Cultural Evolution; *Decision Making; Environment; Evolution; Feeding Behavior; Female; Genes; Humans; Male; Reproduction; Sexual Behavior, Animal  
  Abstract Psychologists, economists, and advertising moguls have long known that human decision-making is strongly influenced by the behavior of others. A rapidly accumulating body of evidence suggests that the same is true in animals. Individuals can use information arising from cues inadvertently produced by the behavior of other individuals with similar requirements. Many of these cues provide public information about the quality of alternatives. The use of public information is taxonomically widespread and can enhance fitness. Public information can lead to cultural evolution, which we suggest may then affect biological evolution.  
  Address U.P.M.C. CNRS-UMR7625, Bat A-7e etage-Case 237, 7 quai Saint Bernard, 75252 Paris Cedex 05, France. edanchin@snv.jussieu.fr  
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  Notes PMID:15273386 Approved no  
  Call Number Serial 2131  
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Author Subiaul, F.; Cantlon, J.F.; Holloway, R.L.; Terrace, H.S. doi  openurl
  Title Cognitive imitation in rhesus macaques Type Journal Article
  Year (up) 2004 Publication Science (New York, N.Y.) Abbreviated Journal Science  
  Volume 305 Issue 5682 Pages 407-410  
  Keywords Animals; *Cognition; *Imitative Behavior; *Learning; Macaca mulatta/*physiology/psychology; Male  
  Abstract Experiments on imitation typically evaluate a student's ability to copy some feature of an expert's motor behavior. Here, we describe a type of observational learning in which a student copies a cognitive rule rather than a specific motor action. Two rhesus macaques were trained to respond, in a prescribed order, to different sets of photographs that were displayed on a touch-sensitive monitor. Because the position of the photographs varied randomly from trial to trial, sequences could not be learned by motor imitation. Both monkeys learned new sequences more rapidly after observing an expert execute those sequences than when they had to learn new sequences entirely by trial and error.  
  Address Department of Anthropology, Columbia University, New York, NY 10027, USA. subiaul@aol.com  
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  Notes PMID:15256673 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2839  
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Author Clayton, N.S. url  openurl
  Title COGNITION: An Open Sandwich or an Open Question? Type Journal Article
  Year (up) 2004 Publication Science Abbreviated Journal Science  
  Volume 305 Issue 5682 Pages 344-  
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  Notes 10.1126/science.1099512 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2955  
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Author Emery, N.J.; Clayton, N.S. url  doi
openurl 
  Title The Mentality of Crows: Convergent Evolution of Intelligence in Corvids and Apes Type Journal Article
  Year (up) 2004 Publication Science Abbreviated Journal Science  
  Volume 306 Issue 5703 Pages 1903-1907  
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  Abstract Discussions of the evolution of intelligence have focused on monkeys and apes because of their close evolutionary relationship to humans. Other large-brained social animals, such as corvids, also understand their physical and social worlds. Here we review recent studies of tool manufacture, mental time travel, and social cognition in corvids, and suggest that complex cognition depends on a “tool kit” consisting of causal reasoning, flexibility, imagination, and prospection. Because corvids and apes share these cognitive tools, we argue that complex cognitive abilities evolved multiple times in distantly related species with vastly different brain structures in order to solve similar socioecological problems.  
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  Notes 10.1126/science.1098410 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2959  
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Author Peham, C.; Licka, T.; Schobesberger, H.; Meschan, E. url  openurl
  Title Influence of the rider on the variability of the equine gait Type Journal Article
  Year (up) 2004 Publication Human Movement Science Abbreviated Journal European Workshop on Movement Science  
  Volume 23 Issue 5 Pages 663-671  
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  Abstract The aim of this study was to show that the motion pattern of a well-ridden horse varies less than the motion pattern of an unridden horse. In order to do so, we recorded the motion of two markers, one attached to the dorsal spinous processus of lumbar vertebra L4, the other to the right fore hoof. In total, we measured 21 horses in trot, ridden and unridden, with a fitting and with a non-fitting saddle. After breaking down the entire time series of the three-dimensional motion of the markers into their respective motion cycles, we computed a measure of motion pattern variability for the motion as well as for the derivatives (velocity and acceleration) along each of the three principal dimensions. Two of six variables (velocity and acceleration in the forward direction) displayed a significant discrimination between the ridden and the unridden case, and demonstrated the beneficial effect of a rider on the horse's motion pattern variability. Saddle fit was shown to have also an influence on motion variability: variability of two variables (velocity and of acceleration in forward direction) was significantly lower with a fitting saddle compared to a non-fitting saddle, a third variable (acceleration in the transversal direction) showed a significant difference also. This new method offers an objective evaluation of saddle fit, and a sensitive assessment of the quality of the rider in the moving horse.  
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  Call Number Equine Behaviour @ team @ Serial 3670  
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Author Kaminski, J.; Call, J.; Fischer, J. url  doi
openurl 
  Title Word Learning in a Domestic Dog: Evidence for “Fast Mapping” Type Journal Article
  Year (up) 2004 Publication Science Abbreviated Journal Science  
  Volume 304 Issue 5677 Pages 1682-1683  
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  Abstract During speech acquisition, children form quick and rough hypotheses about the meaning of a new word after only a single exposure--a process dubbed “fast mapping.” Here we provide evidence that a border collie, Rico, is able to fast map. Rico knew the labels of over 200 different items. He inferred the names of novel items by exclusion learning and correctly retrieved those items right away as well as 4 weeks after the initial exposure. Fast mapping thus appears to be mediated by general learning and memory mechanisms also found in other animals and not by a language acquisition device that is special to humans.  
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  Notes 10.1126/science.1097859 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4678  
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