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Tool Use Behavior (0):
Recent article
Tool Use Behavior
Abstract
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Abstract
Theory in Biosciences (129)2-3 2010
Abstract
We human beings may consider ourselves, there was nothing special about the way we came into existence. Modern human cognition is a very recent acquisition; and its emergence ushered in an entirely new pattern of technological (and other behavioral) innovation, in which constant change results from...
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PMID: 20509011
PDF is available here.
PDF is available here.
Theory in Biosciences (129)2-3 2010
Abstract
In this article, language is considered as a behavioural trait evolving by means of natural selection, in co-evolution with the Palaeolithic tool industries. This perspective enables an analysis of the grammatical and syntactic equivalents of the multiple abilities and effects of lithic tools across...
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PMID: 20502979
PDF is available here.
PDF is available here.
Animal Cognition (13)4 2010
Abstract
We question assertions that chimpanzees, and non-human great apes in general, lack the key characteristics of children's collaborative play. Here, we show that zoo gorillas play games that are both triadic and collaborative. These games were videotaped at the San Francisco Zoo in five different year...
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PMID: 20066451
PDF is available here.
PDF is available here.
Animal Cognition (13)4 2010
Abstract
We question assertions that chimpanzees, and non-human great apes in general, lack the key characteristics of children's collaborative play. Here, we show that zoo gorillas play games that are both triadic and collaborative. These games were videotaped at the San Francisco Zoo in five different year...
|
PMID: 20066451
PDF is available here.
PDF is available here.
Animal Cognition (13)4 2010
Abstract
We question assertions that chimpanzees, and non-human great apes in general, lack the key characteristics of children's collaborative play. Here, we show that zoo gorillas play games that are both triadic and collaborative. These games were videotaped at the San Francisco Zoo in five different year...
|
PMID: 20066451
PDF is available here.
PDF is available here.
Animal Cognition (13)4 2010
Abstract
We question assertions that chimpanzees, and non-human great apes in general, lack the key characteristics of children's collaborative play. Here, we show that zoo gorillas play games that are both triadic and collaborative. These games were videotaped at the San Francisco Zoo in five different year...
|
PMID: 20066451
PDF is available here.
PDF is available here.
Abstract
We deployed motion-triggered video cameras at seven larva-fishing sites. From 1797 camera hours of surveillance over 111 days, we recorded 317 site visits by at least 14 individual crows. Tool use was observed during 150 site visits. Our video footage revealed notable variation in foraging success a...
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PMID: 20053646
PDF is available here.
PDF is available here.
Psychological Review (117)2 2010
Abstract
We examine the potential of the computational view and the ecological view to account for human tool use. To anticipate our conclusions, neither of these approaches is likely to be satisfactory, notably because of their incapacity to resolve the issue of why humans spontaneously use tools. In respon...
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PMID: 20438236
PDF is available here.
PDF is available here.
Abstract
We report a new type of percussive technology in food processing by chimpanzees in the Nimba Mountains, Guinea: Treculia fracturing. Chimpanzees appear to use stone and wooden "cleavers" as tools, as well as stone outcrop "anvils" as substrate to fracture the large and fibrous fruits of Treculia afr...
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PMID: 19967575
PDF is available here.
PDF is available here.
Abstract
We compared the brain structures of NC crows with those of carrion crows, jays and sparrows. The brains of NC crows were characterized by a relatively large mesopallium, striatopallidal complex, septum and tegmentum. These structures mostly deal with association and motor-learning. This supports the...
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PMID: 20215728
PDF is available here.
PDF is available here.
Abstract
We provide the first evidence that chimpanzees have a latent capacity to socially learn to construct a composite tool. Fifty chimpanzees were assigned to one of five demonstration conditions that varied in the amount and type of information available in video footage of a conspecific. Chimpanzees ex...
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PMID: 19570785
PDF is available here.
PDF is available here.
Scientific American (301)2 2009
Abstract
Abstract
Abstract
The authors studied the trajectories of the hand and of the tip of a handheld sliding first-order lever in aiming movements. With this kind of tool, straight trajectories of the hand are generally associated with curved trajectories of the tip of the lever and vice versa. Trajectories of the tip of...
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PMID: 19331495
PDF is available here.
PDF is available here.
Abstract
We show that the results of Spivey et al.need not be ascribed to continuous speech processing. Instead, their results can be ascribed to discrete processing of speech, provided one appeals to an already supported model of motor control that asserts that switching movements from 1 target to another r...
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PMID: 19331511
PDF is available here.
PDF is available here.
Animal Cognition (12)2 2009
Abstract
We tested six orangutans and five bonobos using a set-up in which our subjects had to guide a human experimenter to the hiding place of a fork which was needed in order to retrieve a piece of food for the subject out of a vertical tube. We further examined the potential role of a competitive/decepti...
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PMID: 18953583
PDF is available here.
PDF is available here.
Abstract
We examined the kinematics and energetics of the nut-cracking action of two adult males and two adult females. From a bipedal stance, the monkeys raised a heavy hammer stone (1.46 and 1.32 kg, from 33 to 77% of their body weight) to an average height of 0.33 m, 60% of body length. Then, they rapidly...
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PMID: 18785652
PDF is available here.
PDF is available here.
Abstract
We presented New Caledonian crows with a series of two-trap versions of this problem. Three out of six crows solved the initial trap-tube. These crows continued to avoid the trap when the arbitrary features that had previously been associated with successful performances were removed. However, they...
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PMID: 18796393
PDF is available here.
PDF is available here.
Abstract
The hand preference items included into Chapman and Chapman's (1987) inventory were comparatively assessed concerning the frequencies of the answers given by Bulgarian right, mixed, and left handers, concerning the correlation of each item with the remaining 12, with eyedness and footedness scores....
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PMID: 19466632
PDF is available here.
PDF is available here.
Abstract
Population-level right handedness is a human universal, whose evolutionary origins are the source of considerable empirical and theoretical debate. Although our closest neighbor, the chimpanzee, shows some evidence for population-level handedness in captivity, there is little evidence from the wild....
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PMID: 18942096
PDF is available here.
PDF is available here.
Cuadernos de bioetica : revista oficial de la Asociacion Espanola de Bioetica y Etica Medica (20)68 2009
Abstract
Technique is not accidental, but essential, to human being. It is the homo sapiens sapiens way of life. There is neither pretechnological human life nor a historic period without it. Human being is making tools and instruments since the very moment he is on earth. And so will he go on. Plough, airsh...
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PMID: 19507914
PDF is available here.
PDF is available here.
Abstract
Abstract
We present three studies exploring 2- to 4-year-olds' imitation on witnessing a model whose questionable tool use choices suggested her untrustworthiness. In Study 1, children observed the model accidentally select a physically optimal tool for a task and then intentionally reject it for one that wa...
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PMID: 18586262
PDF is available here.
PDF is available here.
Abstract
Imitation of people on educational television is a potential way for very young children to learn new skills. Although toddlers in previous studies exhibited a "video deficit" in learning, 24-month-olds in Study 1 successfully reproduced behaviors modeled by a person who was on video as well as they...
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PMID: 18675431
PDF is available here.
PDF is available here.
Abstract
We investigated developmental changes in the level of information children incorporate into their imitation when a model executes complex, hierarchically organized actions. A total of 57 3-year-olds and 60 5-year-olds participated, watching video demonstrations of an "artificial fruit" box being ope...
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PMID: 18639887
PDF is available here.
PDF is available here.
Developmental Science (11)6 2008
Abstract
We present longitudinal developmental data from semifree-ranging tufted capuchin monkeys (Cebus apella) to evaluate predictions arising from Perception-action theory linking manipulative development and the onset of tool-using. Percussive actions bringing an object into contact with a surface appear...
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PMID: 19046151
PDF is available here.
PDF is available here.
Animal Cognition (11)4 2008
Abstract
We demonstrate that chimpanzees (Pan troglodytes) and orangutans (Pongo abelii) override immediate drives in favor of future needs, and they do not merely rely on associative learning or semantic prospection when confronted with a planning task. These results suggest that great apes engage in planni...
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PMID: 18553113
PDF is available here.
PDF is available here.
Abstract
The control of a cursor on a computer monitor offers a simple means of exploring the limits of the plasticity of human visuomotor coordination. The authors explored the boundary conditions for adaptation to nonlinear visuomotor amplitude transformations. The authors hypothesized that only with termi...
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PMID: 18782712
PDF is available here.
PDF is available here.
Behavioural Processes (79)1 2008
Abstract
We controlled for this factor by testing the capacity to plan in chimpanzees using an exchange paradigm, that involves both a material and a social component, and a tool-use paradigm, similar to the one used on two other ape species. All chimpanzees failed to plan in the exchange task, but three ind...
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PMID: 18502593
PDF is available here.
PDF is available here.
Developmental Psychology (44)5 2008
Abstract
We used to assess infants' ability to identify the goal of another person's tool-use acts. Active training alone facilitated 10-month-old infants' ability to identify the goal of the tool-use event. Active experience using tools may enable infants to build motor representations of tool-use events th...
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PMID: 18793059
PDF is available here.
PDF is available here.
Ideggyogyaszati szemle (61)7-8 2008
Abstract
We know the human evolution started 7-8 million years ago in the African savannah, where upright position and bipedalism were significantly advantageous. The main drive of improving manual actions and tool making could be to obtain more food. Our ancestor got more meat due to more successful hunting...
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PMID: 18763477
PDF is available here.
PDF is available here.
Abstract
We apply archaeological methods to extend our knowledge of chimpanzee material culture. The chaîne opératoire conceptual framework, as introduced by ethnography, established technology as a phased process. Prehistoric archaeology adopted this concept to elucidate technological variability in tool-...
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PMID: 18359504
PDF is available here.
PDF is available here.
Abstract
We examined assemblages of available prey species, their behavior and morphology, consumption by chimpanzees, techniques employed, and tool lengths at 14 sites in eastern, central, and western Africa. Where army ants are eaten, tool length and concomitant technique are a function of prey type. Epiga...
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PMID: 18275983
PDF is available here.
PDF is available here.
Abstract
We have little knowledge on how these tool use behaviors appear at each site and on how these are modified over time. This study reports two"ant-fishing" sessions which occurred 2 years apart by a young male chimpanzee at Bossou, Guinea. Ant-fishing had never been observed before in this community o...
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PMID: 18459112
PDF is available here.
PDF is available here.
Animal Cognition (11)3 2008
Abstract
We also administered a trap-tube task that allowed animals to push or rake the reward with the tool to compare the subjects' performance on both tasks. We used a larger sample of subjects than in previous studies and from all the four species of great apes (Gorilla gorilla, Pan troglodytes, Pan pani...
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PMID: 18183433
PDF is available here.
PDF is available here.
Animal Cognition (11)3 2008
Abstract
The extent to which tool-using animals take into account the properties of the tool is little explored. The use of percussors to crack open encapsulated fruit is a complex form of tool use, the choice of an adequate tool being a critical aspect in success. Several properties (e.g., material, resista...
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PMID: 18183434
PDF is available here.
PDF is available here.
Animal Cognition (11)3 2008
Abstract
We compare the degree to which wild capuchins in Brazil (Cebus nigritus) and Costa Rica (Cebus capucinus) exhibit individual- and population-level handedness during three visually-guided tasks. These tasks required reaching to remove a large leaf covering a hidden food reward, seizing the food rewar...
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PMID: 18183435
PDF is available here.
PDF is available here.
Animal Cognition (11)3 2008
Abstract
We present a first experiment designed to examine chimpanzees' capacity for cumulative social learning. Eleven young chimpanzees were presented with a foraging device, which afforded both a relatively simple and a more complex tool-use technique for extracting honey. The more complex 'probing' techn...
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PMID: 18204869
PDF is available here.
PDF is available here.
Abstract
We trained Japanese macaque monkeys to use tools, an advanced cognitive function monkeys do not exhibit in the wild, and then examined their brains for signs of modification. Following tool-use training, we observed neurophysiological, molecular genetic and morphological changes within the monkey br...
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PMID: 18426757
PDF is available here.
PDF is available here.
Abstract
Determining the brain adaptations that underlie complex tool-use skills is an important component in understanding the physiological bases of human material culture. It is argued here that the ways in which humans skilfully use tools and other manipulable artefacts is possible owing to adaptations t...
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PMID: 18292060
PDF is available here.
PDF is available here.
Abstract
We present results from a positron emission tomography study of functional brain activation during experimental ESA (Oldowan and Acheulean) toolmaking by expert subjects. Together with a previous study of Oldowan toolmaking by novices, these results document increased demands for effective visuomoto...
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PMID: 18292067
PDF is available here.
PDF is available here.
Abstract
This article discusses four different scenarios to specify increasingly complex mechanisms that enable increasingly flexible social interactions. The key dimension on which these mechanisms differ is the extent to which organisms are able to process other organisms' intentions and to keep them apart...
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PMID: 18292061
PDF is available here.
PDF is available here.
Abstract
We do so by presenting an overview of the evolution of artefact technology from the maker's point of view, and linking that development to some hypotheses on the evolution of human cognitive capacity. Our main hypothesis is that these data indicate that, in the first part of the trajectory, biologic...
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PMID: 18292066
PDF is available here.
PDF is available here.
Abstract
We investigated this question by presenting 171 apes (Pan troglodytes, Pan paniscus, Gorilla gorilla, and Pongo pygmaeus) with several tool-use problems without giving them initial training or familiarizing them with the test materials. Apes succeeded without experience, but only on problems based o...
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PMID: 18489238
PDF is available here.
PDF is available here.
Acta Psychologica (128)1 2008
Abstract
We utilized a sequence learning paradigm to investigate whether these components are represented separately or are bound together to form a more holistic representation of the action. Participants switched between different transformation rules to achieve certain action effects. In one group, there...
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PMID: 18206846
PDF is available here.
PDF is available here.
Abstract
Animal Cognition (11)2 2008
Abstract
We investigate if they attend to the functional properties of the tools that they routinely use in the wild. Pandanus tools have natural barbs along one edge that enable them to function as hooking implements when the barbs face backwards from the working tip. In experiment 1 we presented eight crow...
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PMID: 17940816
PDF is available here.
PDF is available here.
Animal Cognition (11)2 2008
Abstract
We report social learning in two quite different populations of capuchin monkeys (Cebus apella). In experiment 1, human-raised monkeys observed a familiar human model open a foraging box using a tool in one of two alternative ways: levering versus poking. In experiment 2, mother-raised monkeys viewe...
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PMID: 17968602
PDF is available here.
PDF is available here.
Animal Cognition (11)2 2008
Abstract
I examine the physical cognition of wild savanna baboons (Papio anubis), a species that occupies an omnivorous foraging niche in which a variety of embedded food items are extracted and processed. Baboons were tested on three puzzles, each involving high-quality food that required removal from a nov...
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PMID: 17710453
PDF is available here.
PDF is available here.
Neuroscience Letters (433)3 2008
Abstract
We show that NC crows have highly encephalised brains relative to most other birds that have been studied. We compared the relative brain size of five NC crows with combined data for four passerine species (7 European carrion crows, 2 European magpies, 3 European jays and 4 domestic sparrows) and fo...
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PMID: 18262356
PDF is available here.
PDF is available here.
Behavioural Processes (77)3 2008
Abstract
We speculate that the degree of contact between a tool and a reward influenced people's behavior because contact and physical connection are often correlated in people's natural environments and because contact is a reliable predictor of physical connection....
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PMID: 17890016
PDF is available here.
PDF is available here.
Abstract
We question the view that tool use is rare because cognitive abilities act as an evolutionary constraint and suggest that tools are actually seldom very useful compared with anatomical adaptations. Furthermore, we argue that focussing on animal tool use primarily in terms of human evolution can lead...
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PMID: 18191279
PDF is available here.
PDF is available here.
Abstract
We evaluated two ecologically based hypotheses invoked to account for these differences. We hypothesized that the occurrence and form of SH would be affected by stone availability and the degree of terrestriality. We used standardized sampling methods to assess differences in SH and terrestriality a...
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PMID: 17960729
PDF is available here.
PDF is available here.
Abstract
Among terrestrial mammals, elephants share the unique status, along with humans and great apes, of having large brains, being long-lived and having offspring that require long periods of dependency. Elephants have the largest brains of all terrestrial mammals, including the greatest volume of cerebr...
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PMID: 17617460
PDF is available here.
PDF is available here.
Folia Primatologica (79)4 2008
Abstract
We test the currently accepted taxonomic hypothesis that the hand of the Homo habilis holotype Olduvai hominid 7 (OH7) from Olduvai Gorge can be unambiguously assigned to Homo. Morphometric and morphological comparison with humans and australopithecines (Australopithecus and Paranthropus) indicate t...
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PMID: 18277078
PDF is available here.
PDF is available here.