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	Author	Evans, T.A.; Westergaard, G.C.
	Title	Discrimination of functionally appropriate and inappropriate throwing tools by captive tufted capuchins (Cebus apella)			Type	Journal Article
	Year	2004	Publication	Animal Cognition	Abbreviated Journal	Anim. Cogn.
	Volume	7	Issue	4	Pages	255-262
	Keywords	Animals; Appetitive Behavior; Cebus/psychology; Choice Behavior; Concept Formation; Discrimination Learning; Female; Male; Problem Solving; *Psychomotor Performance; Recognition (Psychology)
	Abstract	A tool-throwing task was used to test whether capuchin monkeys understand the difference between functionally appropriate and functionally inappropriate tools. A group of monkeys was trained to obtain a sticky treat from a container outside their enclosure using a projectile attached to one end of an anchored line. Subsequently, these monkeys were given choice tests between functional and nonfunctional versions of tools used in training. A different feature of the tool was varied between alternatives in each choice test. The monkeys chose to use functional tools significantly more often than nonfunctional tools in early exposures to each choice test. A second experiment tested whether these subjects, as well as a second group of minimally trained participants, could distinguish between functional and nonfunctional tools that appeared different from those used in training. A new set of design features was varied between tools in these choice tests. All participants continued to choose functional tools significantly more often than nonfunctional tools, regardless of their tool-throwing experience or the novel appearance of the tools. These results suggest that capuchin monkeys, like chimpanzees studied in similar experiments, are sensitive to a variety of functionally relevant tool features.
	Address	Alpha Genesis Inc., 95 Castle Hall Road, P.O. Box 557, Yemassee, SC 29945, USA. teprimate@islc.net
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1435-9448	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15138849			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2523
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	Author	Jackson, R.R.; Li, D.
	Title	One-encounter search-image formation by araneophagic spiders			Type	Journal Article
	Year	2004	Publication	Animal Cognition	Abbreviated Journal	Anim. Cogn.
	Volume	7	Issue	4	Pages	247-254
	Keywords	Animals; Appetitive Behavior; Association Learning; Attention; Choice Behavior; Field Dependence-Independence; Food Preferences; Pattern Recognition, Visual; Predatory Behavior; Signal Detection (Psychology); Spiders
	Abstract	An experimental study of search-image use by araneophagic jumping spiders (i.e., salticid spiders that prey routinely on other spiders) supports five conclusions. First, araneophagic salticids have an innate predisposition to form search images for specific prey from their preferred prey category (spiders) rather than for prey from a non-preferred category (insects). Second, single encounters are sufficient for forming search images. Third, search images are based on selective attention specifically to optical cues. Fourth, there are trade-offs in attention during search-image use (i.e., forming a search image for one type of spider diminishes the araneophagic salticid's attention to other spiders). Fifth, the araneophagic salticid's adoption of search images is costly to the prey (i.e., when the araneophagic salticid adopts a search, the prey's prospects for surviving encounters with the araneophagic salticid are diminished). Cognitive and ecological implications of search-image use are discussed.
	Address	Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore, 117543, Singapore. dbslidq@nus.edu.sg
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1435-9448	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15118915			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2524
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	Author	Hampton, R.R.; Zivin, A.; Murray, E.A.
	Title	Rhesus monkeys (Macaca mulatta) discriminate between knowing and not knowing and collect information as needed before acting			Type	Journal Article
	Year	2004	Publication	Animal Cognition	Abbreviated Journal	Anim. Cogn.
	Volume	7	Issue	4	Pages	239-246
	Keywords	Animals; Association Learning; Awareness; Choice Behavior; Concept Formation; Discrimination Learning; Female; Macaca mulatta/psychology; Male; *Memory, Short-Term; Observation
	Abstract	Humans use memory awareness to determine whether relevant knowledge is available before acting, as when we determine whether we know a phone number before dialing. Such metacognition, or thinking about thinking, can improve selection of appropriate behavior. We investigated whether rhesus monkeys ( Macaca mulatta) are capable of a simple form of metacognitive access to the contents of short-term memory. Monkeys chose among four opaque tubes, one of which concealed food. The tube containing the reward varied randomly from trial to trial. On half the trials the monkeys observed the experimenter baiting the tube, whereas on the remaining trials their view of the baiting was blocked. On each trial, monkeys were allowed a single chance to select the tube containing the reward. During the choice period the monkeys had the opportunity to look down the length of each tube, to determine if it contained food. When they knew the location of the reward, most monkeys chose without looking. In contrast, when ignorant, monkeys often made the effort required to look, thereby learning the location of the reward before choosing. Looking improved accuracy on trials on which monkeys had not observed the baiting. The difference in looking behavior between trials on which the monkeys knew, and trials on which they were ignorant, suggests that rhesus monkeys discriminate between knowing and not knowing. This result extends similar observations made of children and apes to a species of Old World monkey, suggesting that the underlying cognitive capacities may be widely distributed among primates.
	Address	Section on the Neurobiology of Learning and Memory, Laboratory of Neuropsychology, National Institute of Mental Health, NIH, Bethesda, MD 20892-4415, USA. robert@ln.nimh.nih.gov
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1435-9448	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15105996			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2525
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	Author	Waite, T.A.
	Title	Interruptions improve choice performance in gray jays: prolonged information processing versus minimization of costly errors			Type	Journal Article
	Year	2002	Publication	Animal Cognition	Abbreviated Journal	Anim. Cogn.
	Volume	5	Issue	4	Pages	209-214
	Keywords	Animals; Behavior, Animal; Choice Behavior; Female; Learning; Male; Models, Biological; Motivation; Reinforcement Schedule; Songbirds/*physiology; Time Factors
	Abstract	Under the assumption that selection favors minimization of costly errors, erroneous choice may be common when its fitness cost is low. According to an adaptive-choice model, this cost depends on the rate at which an animal encounters the choice: the higher this rate, the smaller the cost of choosing a less valuable option. Errors should thus be more common when interruptions to foraging are shorter. A previous experiment supported this prediction: gray jays, Perisoreus canadensis, were more error prone when subjected to shorter delays to access to food rewards. This pattern, though, is also predicted by an attentional-constraints model. Because the subjects were able to inspect the rewards during delays, their improved performance when subjected to longer delays could have been a byproduct of the experimentally prolonged opportunity for information processing. To evaluate this possibility, a follow-up experiment manipulated both delay to access and whether rewards could be inspected during delays. Depriving jays of the opportunity to inspect rewards (using opaque lids) induced only a small, nonsignificant increase in error rate. This effect was independent of length of delay and so the jays' improved performance when subjected to longer delays was not simply a byproduct of prolonged information processing. More definitively, even when the jays were prevented from inspecting rewards during delays, their performance improved when subjected to longer delays. The findings are thus consistent with the adaptive-choice model.
	Address	Department of Evolution, Ecology, and Organismal Biology, Ohio State University, 1735 Neil Avenue, Columbus, OH 43210-1293, USA. waite.1@osu.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1435-9448	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:12461598			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2592
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	Author	Fagot, J.; Wasserman, E.A.; Young, M.E.
	Title	Discriminating the relation between relations: the role of entropy in abstract conceptualization by baboons (Papio papio) and humans (Homo sapiens)			Type	Journal Article
	Year	2001	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	27	Issue	4	Pages	316-328
	Keywords	Animals; Behavior, Animal; Choice Behavior; Cognition/physiology; Discrimination (Psychology); Discrimination Learning; Entropy; Female; Humans; Judgment/*physiology; Male; Papio
	Abstract	Two baboons (Papio papio) successfully learned relational matching-to-sample: They picked the choice display that involved the same relation among 16 pictures (same or different) as the sample display, although the sample display shared no pictures with the choice displays. The baboons generalized relational matching behavior to sample displays created from novel pictures. Further experiments varying the number of sample pictures and the mixture of same and different sample pictures suggested that entropy plays a key role in the baboons' conceptual behavior. Two humans (Homo sapiens) were similarly trained and tested; their behavior was both similar to and different from the baboons' behavior. The results suggest that animals other than humans and chimpanzees can discriminate the relation between relations. They further suggest that entropy detection may underlie same-different conceptualization, but that additional processes may participate in human conceptualization.
	Address	Comparative Cognition Research Group, Center for Research in Cognitive Neurosciences, 31 Chemin Joseph Aiguier, 13402 Marseille, France. fagot@lnf.cnrs-mrs.fr
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:11676083			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2772
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	Author	Brosnan, S.F.; de Waal, F.B.M.
	Title	A concept of value during experimental exchange in brown capuchin monkeys, Cebus apella			Type	Journal Article
	Year	2004	Publication	Folia primatologica; international journal of primatology	Abbreviated Journal	Folia Primatol (Basel)
	Volume	75	Issue	5	Pages	317-330
	Keywords	Animals; Cebus/psychology; Choice Behavior; Female; Food Preferences; Learning; Male; Sex Factors; Statistics, Nonparametric; Token Economy; Video Recording
	Abstract	We evaluated the response of brown capuchin monkeys to two differentially valued tokens in an experimental exchange situation akin to a simple barter. Monkeys were given a series of three tests to evaluate their ability to associate tokens with food, then their responses were examined in a barter situation in which tokens were either limited or unlimited. Capuchins did not perform barter in the typical sense, returning the tokens which were associated with the reward. However, females, but not males, showed a different response, preferring the higher-value token. This may indicate that they learned to prefer one token over the other rather than to associate the tokens with their specific rewards. This sex difference parallels previous findings of greater reciprocity in female brown capuchins than in males.
	Address	Living Links Center, Emory University, Yerkes National Primate Research Center, 954 N. Gatewood Drive, Atlanta, GA 30329, USA. sbrosna@emory.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0015-5713	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15486443			Approved	no
	Call Number	refbase @ user @			Serial	170
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	Author	DiGian, K.A.; Friedrich, A.M.; Zentall, T.R.
	Title	Discriminative stimuli that follow a delay have added value for pigeons			Type	Journal Article
	Year	2004	Publication	Psychonomic bulletin & review	Abbreviated Journal	Psychon Bull Rev
	Volume	11	Issue	5	Pages	889-895
	Keywords	Animals; Behavior, Animal; Choice Behavior; Columbidae; Cues; Discrimination (Psychology)
	Abstract	Clement, Feltus, Kaiser, and Zentall (2000) reported that pigeons prefer discriminative stimuli that require greater effort (more pecks) to obtain over those that require less effort. In the present experiment, we examined two variables associated with this phenomenon. First, we asked whether delay of reinforcement, presumably a relatively aversive event similar to effort, would produce similar effects. Second, we asked whether the stimulus preference produced by a prior relatively aversive event depends on its anticipation. Anticipation of delay was accomplished by signaling its occurrence. Results indicated that delays can produce preferences similar to those produced by increased effort, but only if the delays are signaled.
	Address	University of Kentucky, Lexington, Kentucky 40506-0044, USA
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1069-9384	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15732699			Approved	no
	Call Number	refbase @ user @			Serial	226
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	Author	Real, L.A.
	Title	Animal choice behavior and the evolution of cognitive architecture			Type	Journal Article
	Year	1991	Publication	Science (New York, N.Y.)	Abbreviated Journal	Science
	Volume	253	Issue	5023	Pages	980-986
	Keywords	Animals; Bees/genetics/physiology; Biomechanics; Choice Behavior; Cognition; Evolution; Mathematics; Models, Genetic; Probability
	Abstract	Animals process sensory information according to specific computational rules and, subsequently, form representations of their environments that form the basis for decisions and choices. The specific computational rules used by organisms will often be evolutionarily adaptive by generating higher probabilities of survival, reproduction, and resource acquisition. Experiments with enclosed colonies of bumblebees constrained to foraging on artificial flowers suggest that the bumblebee's cognitive architecture is designed to efficiently exploit floral resources from spatially structured environments given limits on memory and the neuronal processing of information. A non-linear relationship between the biomechanics of nectar extraction and rates of net energetic gain by individual bees may account for sensitivities to both the arithmetic mean and variance in reward distributions in flowers. Heuristic rules that lead to efficient resource exploitation may also lead to subjective misperception of likelihoods. Subjective probability formation may then be viewed as a problem in pattern recognition subject to specific sampling schemes and memory constraints.
	Address	Department of Biology, University of North Carolina, Chapel Hill 27599-3280
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0036-8075	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:1887231			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2846
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	Author	Brosnan, S.F.; De Waal, F.B.M.
	Title	Monkeys reject unequal pay			Type	Journal Article
	Year	2003	Publication	Nature	Abbreviated Journal	Nature
	Volume	425	Issue	6955	Pages	297-299
	Keywords	Aging; Animals; Cebus/psychology; Choice Behavior; Cooperative Behavior; Female; Male; *Reward; Social Justice
	Abstract	During the evolution of cooperation it may have become critical for individuals to compare their own efforts and pay-offs with those of others. Negative reactions may occur when expectations are violated. One theory proposes that aversion to inequity can explain human cooperation within the bounds of the rational choice model, and may in fact be more inclusive than previous explanations. Although there exists substantial cultural variation in its particulars, this 'sense of fairness' is probably a human universal that has been shown to prevail in a wide variety of circumstances. However, we are not the only cooperative animals, hence inequity aversion may not be uniquely human. Many highly cooperative nonhuman species seem guided by a set of expectations about the outcome of cooperation and the division of resources. Here we demonstrate that a nonhuman primate, the brown capuchin monkey (Cebus apella), responds negatively to unequal reward distribution in exchanges with a human experimenter. Monkeys refused to participate if they witnessed a conspecific obtain a more attractive reward for equal effort, an effect amplified if the partner received such a reward without any effort at all. These reactions support an early evolutionary origin of inequity aversion.
	Address	Living Links, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia 30329, USA. sbrosna@emory.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1476-4687	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:13679918			Approved	no
	Call Number	refbase @ user @			Serial	179
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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	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
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0027-8424	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:11320232			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2823
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