| Records |
| Author |
Hayashi, M.; Matsuzawa, T. |
| Title |
Cognitive development in object manipulation by infant chimpanzees |
Type |
Journal Article |
| Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal  |
Anim. Cogn. |
| Volume |
6 |
Issue |
4 |
Pages |
225-233 |
| Keywords |
Age Factors; Animals; Child Development/physiology; Child, Preschool; Cognition/*physiology; Female; Growth; Humans; Imitative Behavior/physiology; Infant; Learning/*physiology; Male; Mothers/*psychology; Motor Skills/*physiology; Pan troglodytes/*growth & development/*psychology; Psychomotor Performance/*physiology; Species Specificity |
| Abstract |
This study focuses on the development of spontaneous object manipulation in three infant chimpanzees during their first 2 years of life. The three infants were raised by their biological mothers who lived among a group of chimpanzees. A human tester conducted a series of cognitive tests in a triadic situation where mothers collaborated with the researcher during the testing of the infants. Four tasks were presented, taken from normative studies of cognitive development of Japanese infants: inserting objects into corresponding holes in a box, seriating nesting cups, inserting variously shaped objects into corresponding holes in a template, and stacking up wooden blocks. The mothers had already acquired skills to perform these manipulation tasks. The infants were free to observe the mothers' manipulative behavior from immediately after birth. We focused on object-object combinations that were made spontaneously by the infant chimpanzees, without providing food reinforcement for any specific behavior that the infants performed. The three main findings can be summarized as follows. First, there was precocious appearance of object-object combination in infant chimpanzees: the age of onset (8-11 months) was comparable to that in humans (around 10 months old). Second, object-object combinations in chimpanzees remained at a low frequency between 11 and 16 months, then increased dramatically at the age of approximately 1.5 years. At the same time, the accuracy of these object-object combinations also increased. Third, chimpanzee infants showed inserting behavior frequently and from an early age but they did not exhibit stacking behavior during their first 2 years of life, in clear contrast to human data. |
| Address |
Section of Language and Intelligence, Primate Research Institute, Kyoto University, 41 Kanrin, Inuyama, 484-8506 Aichi, Japan. misato@pri.kyoto-u.ac.jp |
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1435-9448 |
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PMID:12905079 |
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no |
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Equine Behaviour @ team @ |
Serial |
2559 |
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| Author |
Westergaard, G.C.; Liv, C.; Rocca, A.M.; Cleveland, A.; Suomi, S.J. |
| Title |
Tufted capuchins (Cebus apella) attribute value to foods and tools during voluntary exchanges with humans |
Type |
Journal Article |
| Year |
2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
7 |
Issue |
1 |
Pages |
19-24 |
| Keywords |
Animals; Cebus/*physiology; *Food; Humans; *Object Attachment; *Social Behavior |
| Abstract |
This research examined exchange and value attribution in tufted capuchin monkeys ( Cebus apella). We presented subjects with opportunities to obtain various foods and a tool from an experimenter in exchange for the foods or tool in the subjects' possession. The times elapsed before the first chow biscuits were expelled and/or an exchange took place were recorded as the dependent measures. Laboratory chow biscuits, grapes, apples, and a metal bolt (a tool used to probe for syrup) were used as experimental stimuli. The subjects demonstrated the ability to recognize that exchanges could occur when an experimenter was present with a desirable food. Results indicate that subjects exhibited significant variation in their willingness to barter based upon the types of foods that were both in their possession and presented by the experimenter. Subjects more readily traded chow biscuits for fruit, and more readily traded apples for grapes than grapes for apples. During the exchange of tools and food, the subjects preferred the following in descending order when the probing apparatus was baited with sweet syrup: grapes, metal bolts, and chow biscuits. However when the apparatus was not baited, the values changed to the following in descending order: grapes, chow, and metal bolts. These results indicate that tufted capuchins recognize opportunities to exchange and engage in a simple barter system whereby low-valued foods are readily traded for more highly valued food. Furthermore, these capuchins demonstrate that their value for a tool changes depending upon its utility. |
| Address |
Division of Research and Development, LABS of Virginia, Inc., 95 Castle Hall Road, P.O. Box 557, Yemassee, SC 29945, USA. Gwprimate@netscape.net |
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1435-9448 |
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PMID:12884078 |
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Equine Behaviour @ team @ |
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2562 |
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Hare, J.F.; Sealy, S.G.; Underwood, T.J.; Ellison, K.S.; Stewart, R.L.M. |
| Title |
Evidence of self-referent phenotype matching revisited: airing out the armpit effect |
Type |
Journal Article |
| Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
6 |
Issue |
1 |
Pages |
65-68 |
| Keywords |
Alleles; Animals; Birds; Cricetinae; Dogs; Humans; Invertebrates; Learning; *Odors; Pedigree; Phenotype; *Recognition (Psychology); Self Psychology; *Social Behavior |
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Department of Zoology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada. harejf@cc.umanitoba.ca |
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1435-9448 |
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PMID:12701614 |
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no |
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Equine Behaviour @ team @ |
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2576 |
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| Author |
Mateo, J.M.; Johnston, R.E. |
| Title |
Kin recognition by self-referent phenotype matching: weighing the evidence |
Type |
Journal Article |
| Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
6 |
Issue |
1 |
Pages |
73-76 |
| Keywords |
Animals; Brain/embryology; Cricetinae/embryology; Humans; Learning; Odors; Phenotype; *Recognition (Psychology); Reproducibility of Results; Research Design; *Self Psychology; *Smell |
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Department of Psychology, Cornell University, NY 14853-7601, Ithaca, USA. jmateo@uchicago.edu |
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1435-9448 |
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PMID:12658537 |
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no |
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Equine Behaviour @ team @ |
Serial |
2579 |
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| Author |
Hauber, M.E.; Sherman, P.W. |
| Title |
Designing and interpreting experimental tests of self-referent phenotype matching |
Type |
Journal Article |
| Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
6 |
Issue |
1 |
Pages |
69-71 |
| Keywords |
Animals; Birds; Body Constitution; Color; Humans; Pedigree; *Perception; Phenotype; *Recognition (Psychology); Research Design; *Self Psychology |
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Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853-2702, USA |
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1435-9448 |
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PMID:12658536 |
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no |
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Equine Behaviour @ team @ |
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2580 |
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| Author |
Caldwell, C.A.; Whiten, A. |
| Title |
Evolutionary perspectives on imitation: is a comparative psychology of social learning possible? |
Type |
Journal Article |
| Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
5 |
Issue |
4 |
Pages |
193-208 |
| Keywords |
Animals; *Behavior, Animal; Evolution; Humans; *Imitative Behavior; Learning; Models, Animal |
| Abstract |
Studies of imitation in animals have become numerous in recent times, but do they contribute to a comparative psychology of social learning? We review this burgeoning field to identify the problems and prospects for such a goal. Difficulties of two main kinds are identified. First, researchers have tackled questions about social learning from at least three very different theoretical perspectives, the “phylogenetic”, “animal model”, and “adaptational”. We examine the conflicts between them and consider the scope for integration. A second difficulty arises in the methodological approaches used in the discipline. In relation to one of these – survey reviews of published studies – we tabulate and compare the contrasting conclusions of nine articles that together review 36 studies. The basis for authors' disagreements, including the matters of perceptual opacity, novelty, sequential structure, and goal representation, are examined. In relation to the other key method, comparative experimentation, we identify 12 studies that have explicitly compared species' imitative ability on similar tasks. We examine the principal problems of comparing like with like in these studies and consider solutions, the most powerful of which we propose to be the use of a systematic range of task designs, rather than any single “gold standard” task. |
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School of Psychology, Washington Singer Laboratories, University of Exeter, Exeter EX4 4QG, UK. C.A.Caldwell@exeter.ac.uk |
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1435-9448 |
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| Notes |
PMID:12461597 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
2593 |
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Bjorklund, D.F.; Yunger, J.L.; Bering, J.M.; Ragan, P. |
| Title |
The generalization of deferred imitation in enculturated chimpanzees (Pan troglodytes) |
Type |
Journal Article |
| Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
5 |
Issue |
1 |
Pages |
49-58 |
| Keywords |
Age Factors; Animals; Behavior, Animal; Humans; *Imitative Behavior; Pan troglodytes/physiology/*psychology; Parenting; Species Specificity |
| Abstract |
Deferred imitation of object-related actions and generalization of imitation to similar but not identical tasks was assessed in three human-reared (enculturated) chimpanzees, ranging in age from 5 to 9 years. Each ape displayed high levels of deferred imitation and only slightly lower levels of generalization of imitation. The youngest two chimpanzees were more apt to generalize the model's actions when they had displayed portions of the target behaviors at baseline, consistent with the idea that learning is more likely to occur when working within the “zone of proximal development.” We argue that generalization of imitation is the best evidence to date of imitative learning in chimpanzees. |
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Department of Psychology, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431-0991, USA. dbjorklund@fau.edu |
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1435-9448 |
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PMID:11957402 |
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no |
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Equine Behaviour @ team @ |
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2610 |
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Maros, K.; Gácsi, M.; Miklósi, Á |
| Title |
Comprehension of human pointing gestures in horses ( Equus caballus ) |
Type |
Journal Article |
| Year |
2008 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
11 |
Issue |
3 |
Pages |
457-466 |
| Keywords |
Human-animal communication – Pointing – Horse |
| Abstract |
Abstract Twenty domestic horses (Equus caballus) were tested for their ability to rely on different human gesticular cues in a two-way object choice task. An experimenter hid food under one of two bowls and after baiting, indicated the location of the food to the subjects by using one of four different cues. Horses could locate the hidden reward on the basis of the distal dynamic-sustained, proximal momentary and proximal dynamic-sustained pointing gestures but failed to perform above chance level when the experimenter performed a distal momentary pointing gesture. The results revealed that horses could rely spontaneously on those cues that could have a stimulus or local enhancement effect, but the possible comprehension of the distal momentary pointing remained unclear. The results are discussed with reference to the involvement of various factors such as predisposition to read human visual cues, the effect of domestication and extensive social experience and the nature of the gesture used by the experimenter in comparative investigations. |
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Equine Behaviour @ team @ |
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4388 |
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Gácsi, M.; Kara, E.; Belényi, B.; Topál, J.; Miklósi, Á. |
| Title |
The effect of development and individual differences in pointing comprehension of dogs |
Type |
Journal Article |
| Year |
2009 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
12 |
Issue |
3 |
Pages |
471-479 |
| Keywords |
Age Factors; Analysis of Variance; Animals; *Association Learning; Attention; Chi-Square Distribution; Choice Behavior; *Comprehension; *Concept Formation; Dogs/*psychology; Female; *Gestures; Humans; Male; Orientation; Statistics, Nonparametric |
| Abstract |
In spite of the rather different procedures actually used in comparative studies to test the ability of different species to rely on the human pointing gesture, there is no debate on the high performance of dogs in such tasks. Very little is known, however, on the course through which they acquire this ability or the probable factors influencing the process. Important developmental questions have remained unsolved and also some methodological concerns should be addressed before we can convincingly argue for one interpretation or another. In this study we tested 180 dogs of different age (from 2 months to adults) to investigate their performance in the human distal momentary pointing gesture. The results, analyzed at both the group and the individual levels, showed no difference in the performance according to age, indicating that in dogs the comprehension of the human pointing may require only very limited and rapid early learning to fully develop. Interestingly, neither the keeping conditions nor the time spent in active interaction with the owner, and not even some special (agility) training for using human visual cues, had significant effect on the success and explained individual differences. The performance of the dogs was rather stable over time: during the 20 trials within a session and even when subsamples of different age were repeatedly tested. Considering that in spite of the general success at the group level, more than half of the dogs were not successful at the individual level, we revealed alternative “decision-making rules” other than following the pointing gesture of the experimenter. |
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Department of Ethology, Eotvos University, Budapest, Hungary. gm.art@t-online.hu |
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1435-9456 |
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PMID:19130102 |
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Equine Behaviour @ team @ |
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4969 |
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Smith, B.; Litchfield, C. |
| Title |
Dingoes (Canis dingo) can use human social cues to locate hidden food |
Type |
Journal Article |
| Year |
2010 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
13 |
Issue |
2 |
Pages |
367-376 |
| Keywords |
Dingo – Dog – Human pointing – Object-choice task – Social cognition – Domestication |
| Abstract |
Abstract There is contention concerning the role that domestication plays in the responsiveness of canids to human social cues, with most studies investigating abilities of recognized domestic dog breeds or wolves. Valuable insight regarding the evolution of social communication with humans might be gained by investigating Australian dingoes, which have an early history of domestication, but have been free-ranging in Australia for approximately 3500–5000 years. Seven ‘pure’ dingoes were tested outdoors by a familiar experimenter using the object-choice paradigm to determine whether they could follow nine human communicative gestures previously tested with domestic dogs and captive wolves. Dingoes passed all cues significantly above control, including the “benchmark” momentary distal pointing, with the exception of gaze only, gaze and point, and pointing from the incorrect location. Dingo performance appears to lie somewhere between wolves and dogs, which suggests that domestication may have played a role in their ability to comprehend human gestures. |
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Equine Behaviour @ team @ |
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5116 |
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