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Russell, C.L.; Bard, K.A.; Adamson, L.B. |
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Title |
Social referencing by young chimpanzees (Pan troglodytes) |
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Year |
1997 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
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111 |
Issue |
2 |
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185-191 |
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Keywords |
happy & fear messages concerning novel objects from familiar human caregiver, social referencing, 14–41 mo old chimpanzees |
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Abstract |
Social referencing is the seeking of information from another individual and the use of that information to evaluate a situation. It is a well-documented ability in human infants but has not been studied experimentally in nonhuman primates. Seventeen young nursery-reared chimpanzees (14 to 41 months old) were observed in a standard social referencing paradigm in which they received happy and fear messages concerning novel objects from a familiar human caregiver. Each chimpanzee looked referentially at their caregiver, and the emotional messages that they received differentially influenced their gaze behavior and avoidance of the novel objects. It is concluded that chimpanzees can acquire information about their complex social and physical environments through social referencing and can use emotional information to alter their own behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
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US: American Psychological Association |
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1939-2087(Electronic);0735-7036(Print) |
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Equine Behaviour @ team @ 1997-06365-008 |
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5603 |
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Schultz, W.; Dayan, P.; Montague, P.R. |
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Title |
A Neural Substrate of Prediction and Reward |
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Journal Article |
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Year |
1997 |
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Science |
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275 |
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5306 |
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1593-1599 |
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The capacity to predict future events permits a creature to detect, model, and manipulate the causal structure of its interactions with its environment. Behavioral experiments suggest that learning is driven by changes in the expectations about future salient events such as rewards and punishments. Physiological work has recently complemented these studies by identifying dopaminergic neurons in the primate whose fluctuating output apparently signals changes or errors in the predictions of future salient and rewarding events. Taken together, these findings can be understood through quantitative theories of adaptive optimizing control. |
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Equine Behaviour @ team @ |
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5749 |
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Palme, R.; Moestl, E. |
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Title |
Measurement of cortisol metabolites in faeces of sheep as a parameter of cortisol concentration in blood |
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Journal Article |
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Year |
1997 |
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Zeitschrift für Säugetierkunde |
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J. Mammal. Biol. |
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62 |
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192-197 |
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glucocorticoids, metabolites, animal biology, sheep, immunoenzyme techniques, |
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Equine Behaviour @ team @ |
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6044 |
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Shmidt Mech, L.D. |
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Wolf pack size and food acquisition |
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1997 |
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Am Nat |
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150 |
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Equine Behaviour @ team @ Shmidt Mech1997 |
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6482 |
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Author |
Beaugrand, J.P. |
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Title |
Relative importance of initial individual differences, victory and defeat experiences, and assessment accuracy during hierarchy formation: A simulation study |
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Miscellaneous |
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1997 |
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Cogprints |
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41 |
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177-192 |
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Dominance; Hierarchy formation; RHP; agonistic experience; Assessment; Self-organization; Simulation |
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This simulation study explores some conditions leading to transitivity within dominance orders. Combinations of three parameters were varied to study their consequences upon hierarchy formation and upon the degree of linearity of resultant structures. The factors studied were (i) the importance of initial Resource Holding Potentials (RHPs) , (ii) changes brought in RHPs by successive victories and defeats, and (iii) accuracy of RHP assessment made by opponents. Results show that initial differences in RHP always lead to perfectly transitive chains whose rank order reflects the importance of initial differences. Even when simulated animals make important errors while assessing each other during round robin tournaments, emerging dominance structures are perfectly linear and ranks obtained in the structure are highly correlated with initial values in RHPs. Moreover, accumulated experiences of victory and/or defeat alone always lead to perfectly linear hierarchies. Their combination with initial individual differences in RHP led to the same conclusion. Even when assessment was far from being perfect, not only perfect chains were formed but initial values in RHPs significantly influenced rank order when the contribution of victory and defeat to RHP was relatively unimportant. The higher the importance of victory and defeat to RHP as compared to that of initial RHP values, the lower was the correlation between initial RHP values and the ranks order reached by individuals in the resultant hierarchies. In general also, the lower the variation within initial RHPs, the lower was the correlation between initial RHPs and ranks in the hierarchy. At a given level of initial RHP dispersion, increasing the contribution of victory and defeat to RHP diminished the correlation between initial RHP values and obtained ranks. In addition, inaccurate assessment reduced the overall correlation, especially when dispersion of initial RHP values was low and the contribution of victory and defeat was high. These results shed some light on the controversy about the respective roles of initial individual attributes and that of patterns of resolution in the formation of animal hierarchies. We present the emergence of social order within closed systems as those simulated here as a case of self-organization. |
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Elsevier |
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Equine Behaviour @ team @ cogprints:1965 |
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4291 |
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Author |
Pennisi, E. |
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Title |
Schizophrenia clues from monkeys |
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1997 |
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Science (New York, N.Y.) |
Abbreviated Journal |
Science |
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277 |
Issue |
5328 |
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900 |
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Animals; Antipsychotic Agents/pharmacology; Behavior, Animal/drug effects; *Cercopithecus aethiops; Clozapine/pharmacology; Cognition/drug effects; *Disease Models, Animal; Dopamine/*metabolism; Excitatory Amino Acid Antagonists/pharmacology; Memory/drug effects; Phencyclidine/*pharmacology; Prefrontal Cortex/*metabolism; Schizophrenia/chemically induced/drug therapy/*metabolism; Schizophrenic Psychology |
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0036-8075 |
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PMID:9281070 |
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Equine Behaviour @ team @ |
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2844 |
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Author |
Williams, N. |
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Title |
Evolutionary psychologists look for roots of cognition |
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1997 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
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Volume |
275 |
Issue |
5296 |
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29-30 |
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Animals; *Behavior, Animal; Birds; *Cognition; *Evolution; Female; Humans; Macaca mulatta/psychology; Male; Memory; Reward; *Social Sciences |
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0036-8075 |
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PMID:8999531 |
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Equine Behaviour @ team @ |
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2845 |
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