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Author |
Kaiser, D.H.; Zentall, T.R.; Neiman, E. |
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Title |
Timing in pigeons: effects of the similarity between intertrial interval and gap in a timing signal |
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Journal Article |
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Year |
2002 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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28 |
Issue |
4 |
Pages |
416-422 |
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Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
Animals; *Attention; Columbidae; *Conditioning, Operant; Discrimination Learning; Mental Recall; Probability Learning; *Reinforcement (Psychology); *Reinforcement Schedule; Retention (Psychology); Time Factors; *Time Perception/physiology |
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Abstract |
Previous research suggests that when a fixed interval is interrupted (known as the gap procedure), pigeons tend to reset memory and start timing from 0 after the gap. However, because the ambient conditions of the gap typically have been the same as during the intertrial interval (ITI), ambiguity may have resulted. In the present experiment, the authors found that when ambient conditions during the gap were similar to the ITI, pigeons tended to reset memory, but when ambient conditions during the gap were different from the ITI, pigeons tended to stop timing, retain the duration of the stimulus in memory, and add to that time when the stimulus reappeared. Thus, when the gap was unambiguous, pigeons timed accurately. |
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Department of Psychology, East Carolina University, Greenville, North Carolina 27858, USA. kaiserd@mail.ecu.edu |
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0097-7403 |
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PMID:12395499 |
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refbase @ user @ |
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238 |
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Author |
Zentall, T.R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Timing, memory for intervals, and memory for untimed stimuli: the role of instructional ambiguity |
Type |
Journal Article |
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Year |
2005 |
Publication |
Behavioural processes |
Abbreviated Journal |
Behav. Process. |
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Volume |
70 |
Issue |
3 |
Pages |
209-222 |
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Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
Animals; *Attention; Columbidae; *Discrimination Learning; *Memory, Short-Term; Practice (Psychology); Reinforcement Schedule; *Retention (Psychology); *Time Perception |
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Theories of animal timing have had to account for findings that the memory for the duration of a timed interval appears to be dramatically shorted within a short time of its termination. This finding has led to the subjective shortening hypothesis and it has been proposed to account for the poor memory that animals appear to have for the initial portion of a timed interval when a gap is inserted in the to-be-timed signal. It has also been proposed to account for the poor memory for a relatively long interval that has been discriminated from a shorter interval. I suggest here a simpler account in which ambiguity between the gap or retention interval and the intertrial interval results in resetting the clock, rather than forgetting the interval. The ambiguity hypothesis, together with a signal salience mechanism that determines how quickly the clock is reset at the start of the intertrial interval can account for the results of the reported timing experiments that have used the peak procedure. Furthermore, instructional ambiguity rather than memory loss may account for the results of many animal memory experiments that do not involve memory for time. |
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Department of Psychology, University of Kentucky, 202B Kastle Hall, Lexington, KY 40506-0044, USA. zentall@uky.edu |
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0376-6357 |
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PMID:16095851 |
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refbase @ user @ |
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222 |
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Hauber, M.E.; Pearson, H.E.; Reh, A.; Merges, A. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Discrimination between host songs by brood parasitic brown-headed cowbirds ( Molothrus ater) |
Type |
Journal Article |
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Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
5 |
Issue |
3 |
Pages |
129-137 |
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Animals; *Auditory Perception; *Discrimination Learning; Female; Male; Sexual Behavior; *Songbirds; *Vocalization, Animal |
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Songbirds can learn both to produce and to discriminate between different classes of acoustic stimuli. Varying levels of auditory discrimination may improve the fitness of individuals in certain ecological and social contexts and, thus, selection is expected to mold the cognitive abilities of different species according to the potential benefits of acoustic processing. Although fine-scale auditory discrimination of conspecific songs and calls has been frequently reported for brood parasitic brown-headed cowbirds ( Molothrus ater), it remains unclear why and how they perceive differently the songs of their many host species. Using habituation-dishabituation paradigms and measuring behavioral and physiological (heart-rate) responses, we found that captive female cowbirds consistently discriminated between songs of two host species, the song sparrow ( Melospiza melodia) and the red-winged blackbird ( Agelaius phoeniceus). Playback experiments with stimuli composed of con-specific followed by heterospecific vocalizations in the field also demonstrated discrimination between these heterospecific songs even though cowbirds were not attracted to playbacks of either host species' songs alone. Our results do not directly support a nest-searching function of heterospecific song discrimination by cowbirds and are most consistent with a function of the parasites' avoidance of attacks by their aggressive hosts. These data demonstrate discrimination between heterospecific vocalizations by brown-headed cowbirds and add a novel dimension to the already expansive auditory perceptual abilities of brood parasitic species and other songbirds. |
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Field Neurobiology and Behavior, Cornell, University, Ithaca, NY 14853, USA. hauberm@socrates.berkeley.edu |
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1435-9448 |
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PMID:12357285 |
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Equine Behaviour @ team @ |
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2600 |
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Author |
Zucca, P.; Antonelli, F.; Vallortigara, G. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Detour behaviour in three species of birds: quails (Coturnix sp.), herring gulls (Larus cachinnans) and canaries (Serinus canaria) |
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Journal Article |
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Year |
2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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8 |
Issue |
2 |
Pages |
122-128 |
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Animals; *Avoidance Learning; *Birds; Canaries; Charadriiformes; Coturnix; *Discrimination Learning; Orientation; *Space Perception; *Spatial Behavior; Species Specificity |
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Detour behaviour is the ability of an animal to reach a goal stimulus by moving round any interposed obstacle. It has been widely studied and has been proposed as a test of insight learning in several species of mammals, but few data are available in birds. A comparative study in three species of birds, belonging to different eco-ethological niches, allows a better understanding of the cognitive mechanism of such detour behaviour. Young quails (Coturnix sp.), herring gulls (Larus cachinnans) and canaries (Serinus canaria), 1 month old, 10-25 days old and 4-6 months old, respectively, were tested in a detour situation requiring them to abandon a clear view of a biologically interesting object (their own reflection in a mirror) in order to approach that object. Birds were placed in a closed corridor, at one end of which was a barrier through which the object was visible. Four different types of barrier were used: vertical bar, horizontal bar, grid and transparent. Two symmetrical apertures placed midline in the corridor allowed the birds to adopt routes passing around the barrier. After entering the apertures, birds could turn either right or left to re-establish social contact with the object in the absence of any local sensory cues emanating from it. Quails appeared able to solve the task, though their performance depended on the type of barrier used, which appeared to modulate their relative interest in approaching the object or in exploring the surroundings. Young herring gulls also showed excellent abilities to locate spatially the out-of-view object, except when the transparent barrier was used. Canaries, on the other hand, appeared completely unable to solve the detour task, whatever barrier was in use. It is suggested that these species differences can be accounted for in terms of adaptation to a terrestrial or aerial environment. |
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Laboratory of Animal Cognition and Comparative Neuroscience, Department of Psychology, University of Trieste, Via S. Anastasio 12, 34100, Trieste, Italy. zucca@units.it |
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1435-9448 |
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PMID:15449104 |
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Equine Behaviour @ team @ |
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2506 |
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Author |
Martin, T.I.; Zentall, T.R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Post-choice information processing by pigeons |
Type |
Journal Article |
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Year |
2005 |
Publication |
Animal cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
8 |
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4 |
Pages |
273-278 |
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Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
Animals; *Behavior, Animal; *Choice Behavior; *Columbidae; Discrimination Learning |
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In a conditional discrimination (matching-to-sample), a sample is followed by two comparison stimuli, one of which is correct, depending on the sample. Evidence from previous research suggests that if the stimulus display is maintained following an incorrect response (the so-called penalty-time procedure), acquisition by pigeons is facilitated. The present research tested the hypothesis that the penalty-time procedure allows the pigeons to review and learn from the maintained stimulus display following an incorrect choice. It did so by including a penalty-time group for which, following an incorrect choice, the sample changed to match the incorrect comparison, thus providing the pigeons with post-choice 'misinformation.' This misinformation group acquired the matching task significantly slower than the standard penalty-time group (that had no change in the sample following an error). Furthermore, acquisition of matching by a control group that received no penalty time fell midway between the other two groups, suggesting that the pigeons did not merely take more care in making choices because of the aversiveness of penalty-time. Thus, it appears that in the acquisition of matching-to-sample, when the stimulus display is maintained following an incorrect choice, the pigeons can review or acquire information from the display. This is the first time that such an effect has been reported for a nonhuman species. |
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Department of Psychology, University of Kentucky, Lexington, KY 40506, USA |
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1435-9448 |
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PMID:15744507 |
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refbase @ user @ |
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225 |
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Permanent link to this record |
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Hauser, M.D.; Kralik, J.; Botto-Mahan, C.; Garrett, M.; Oser, J. |
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Self-recognition in primates: phylogeny and the salience of species-typical features |
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Journal Article |
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1995 |
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Proceedings of the National Academy of Sciences of the United States of America |
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Proc. Natl. Acad. Sci. U.S.A. |
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92 |
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23 |
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10811-10814 |
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Animals; *Behavior, Animal; *Cognition; Discrimination (Psychology); Exploratory Behavior; Female; Hair Color; Male; Phylogeny; Psychology, Comparative; Research Design; Saguinus/*psychology; *Self Concept; Species Specificity; Touch; *Visual Perception |
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Self-recognition has been explored in nonlinguistic organisms by recording whether individuals touch a dye-marked area on visually inaccessible parts of their face while looking in a mirror or inspect parts of their body while using the mirror's reflection. Only chimpanzees, gorillas, orangutans, and humans over the age of approximately 2 years consistently evidence self-directed mirror-guided behavior without experimenter training. To evaluate the inferred phylogenetic gap between hominoids and other animals, a modified dye-mark test was conducted with cotton-top tamarins (Saguinus oedipus), a New World monkey species. The white hair on the tamarins' head was color-dyed, thereby significantly altering a visually distinctive species-typical feature. Only individuals with dyed hair and prior mirror exposure touched their head while looking in the mirror. They looked longer in the mirror than controls, and some individuals used the mirror to observe visually inaccessible body parts. Prior failures to pass the mirror test may have been due to methodological problems, rather than to phylogenetic differences in the capacity for self-recognition. Specifically, an individual's sensitivity to experimentally modified parts of its body may depend crucially on the relative saliency of the modified part (e.g., face versus hair). Moreover, and in contrast to previous claims, we suggest that the mirror test may not be sufficient for assessing the concept of self or mental state attribution in nonlinguistic organisms. |
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Department of Anthropology, Harvard University, Cambridge, MA 02138, USA |
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0027-8424 |
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PMID:7479889 |
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Equine Behaviour @ team @ |
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2825 |
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Pepperberg, I.M. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
The value of the Piagetian framework for comparative cognitive studies |
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Journal Article |
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2002 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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5 |
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3 |
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177-182 |
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Animals; *Behavior, Animal; *Cognition; Discrimination Learning; *Intelligence; *Models, Psychological; *Models, Theoretical |
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Although the Piagetian framework has been used by numerous researchers to compare cognitive abilities of diverse species, the system is often criticized as implemented. I examine the various criticisms, suggest ways in which the system can be improved, and argue for the need for descriptive systems such as the Piagetian framework to complement programs that look for cellular and molecular bases or mathematical models to explain behavior. |
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School of Architecture and Planning, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. impepper@media.mit.edu |
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1435-9448 |
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PMID:12357290 |
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Equine Behaviour @ team @ |
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2595 |
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Author |
Hunt, G.R.; Gray, R.D. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Direct observations of pandanus-tool manufacture and use by a New Caledonian crow (Corvus moneduloides) |
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Journal Article |
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2004 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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7 |
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2 |
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114-120 |
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Animals; *Behavior, Animal; *Discrimination Learning; *Feeding Behavior; *Functional Laterality; Manufactured Materials; *Plant Leaves; *Songbirds |
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New Caledonian crows are reported to have impressive pandanus-tool manufacture abilities. These claims are based on an extensive artefact record. However, inferring behavioural and cognitive abilities without direct observation of tool manufacture is problematic. Here we report (and document on video) direct observations of a crow making and using stepped pandanus tools at Pic Ningua. We observed (1) a bias for making tools on left edges consistent with that previously found at the site, (2) faithful manufacture of a stepped design with high overall congruence in the shapes of tools, (3) the use of convergent rips to first form the tapered end working away from the trunk then the wide end working towards the trunk, (4) appropriate functional use of stepped tools by use of the leaf-edge barbs to hook food from holes, and (5) consistent holding of tools on the left side of its head when using them. Our observations verify most of the claims based on the artefact record, but the crow's exact manufacture technique was slightly different to that inferred previously. |
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Department of Psychology, University of Auckland, 92019 Auckland, New Zealand. grhunt10@hotmail.com |
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1435-9448 |
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PMID:15069611 |
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Equine Behaviour @ team @ |
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2529 |
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Ray, E.D.; Heyes, C.M. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Do rats in a two-action test encode movement egocentrically or allocentrically? |
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Journal Article |
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2002 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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5 |
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4 |
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245-252 |
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Animals; *Behavior, Animal; *Discrimination Learning; *Imitative Behavior; Male; Random Allocation; Rats/physiology/*psychology; Smell |
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Two-action tests of imitation compare groups that observe topographically different responses to a common manipulandum. The general aim of the two experiments reported here was to find a demonstrator-consistent responding effect in a procedure that could be elaborated to investigate aspects of what was learned about the demonstrated lever response. Experiment 1 was a pilot study with rats of a variant of the two-action method of investigating social learning about observed responses. Groups of observer rats ( Rattus norvegicus) saw a demonstrator push a lever up or down for a food reward. When these observers were subsequently given access to the lever and rewarded for responses in both directions, their directional preferences were compared with two 'screen control' groups that were unable to see their demonstrators' behaviour. Demonstrator-consistent responding was found to be restricted to observers that were able to see demonstrator performance, suggesting that scent cues alone were insufficient to cue a preference for the demonstrators' response direction and thereby that the rats learned by observation about body movements (imitation) or lever movement (emulation). Experiment 2 assessed responding on two levers, one that had been manipulated by the demonstrator, and a second, transposed lever positioned some distance away. Demonstrator-consistent responding was abolished when actions were observed and performed in different parts of the apparatus, suggesting that observed movement was encoded allocentrically with respect to the apparatus rather than egocentrically with respect to the actor's body. With particular reference to the influence of scent cues, the results are discussed in relation to the strengths and weaknesses of this and other varieties of the two-action procedure as tests of imitation in animals and human infants. |
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Department of Psychology, University College London, London WC1E 6BT, UK. e.ray@ucl.ac.uk |
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1435-9448 |
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PMID:12461602 |
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Equine Behaviour @ team @ |
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2588 |
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Permanent link to this record |
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Author |
Heschl, A.; Burkart, J. |
![find record details (via OpenURL) openurl](img/xref.gif)
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A new mark test for mirror self-recognition in non-human primates |
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Journal Article |
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2006 |
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Primates |
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Primates |
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47 |
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3 |
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187-198 |
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Animals; *Behavior, Animal; Callithrix/*physiology; Cognition/*physiology; Discrimination (Psychology)/physiology; Female; Male; Photic Stimulation; *Self Concept |
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For 30 years Gallup's (Science 167:86-87, 1970) mark test, which consists of confronting a mirror-experienced test animal with its own previously altered mirror image, usually a color mark on forehead, eyebrow or ear, has delivered valuable results about the distribution of visual self-recognition in non-human primates. Chimpanzees, bonobos, orangutans and, less frequently, gorillas can learn to correctly understand the reflection of their body in a mirror. However, the standard version of the mark test is good only for positively proving the existence of self-recognition. Conclusive statements about the lack of self-recognition are more difficult because of the methodological constraints of the test. This situation has led to a persistent controversy about the power of Gallup's original technique. We devised a new variant of the test which permits more unequivocal decisions about both the presence and absence of self-recognition. This new procedure was tested with marmoset monkeys (Callithrix jacchus), following extensive training with mirror-related tasks to facilitate performance in the standard mark test. The results show that a slightly altered mark test with a new marking substance (chocolate cream) can help to reliably discriminate between true negative results, indicating a real lack of ability to recognize oneself in a mirror, from false negative results that are due to methodological particularities of the standard test. Finally, an evolutionary hypothesis is put forward as to why many primates can use a mirror instrumentally – i.e. know how to use it for grasping at hidden objects – while failing in the decisive mark test. |
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Konrad Lorenz Institute for Evolution and Cognition Research, Adolf Lorenz Gasse 2, 3422, Altenberg, Austria. adolf.heschl@uni-graz.at |
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ISSN |
0032-8332 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:16432640 |
Approved |
no |
|
|
Call Number |
Equine Behaviour @ team @ |
Serial |
2810 |
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Permanent link to this record |