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Author |
Friedrich, A.M.; Clement, T.S.; Zentall, T.R. |
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Title |
Functional equivalence in pigeons involving a four-member class |
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Journal Article |
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Year |
2004 |
Publication |
Behavioural processes |
Abbreviated Journal |
Behav. Process. |
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Volume |
67 |
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3 |
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395-403 |
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Animals; *Association Learning; *Behavior, Animal; *Cognition; Columbidae; *Concept Formation |
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Abstract |
Research suggests that animals are capable of forming functional equivalence relations or stimulus classes of the kind usually demonstrated by humans (e.g., the class defined by an object and the word for that object). In pigeons, such functional equivalences are typically established using many-to-one matching-to-sample in which two samples are associated with one comparison stimulus and two different samples are associated with the other. Evidence for the establishment of functional equivalences between samples associated with the same comparison comes from transfer tests. In Experiment 1, we found that pigeons can form a single class consisting of four members (many-to-one matching) when the alternative class has only one member (one-to-one matching). In Experiment 2, we ruled out the possibility that the pigeons acquired the hybrid one-to-one/many-to-one task by developing a single-code/default coding strategy as earlier research suggested that it might. Thus, pigeons can develop a functional class consisting of as many as four members, with the alternative class consisting of a single member. |
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Department of Psychology, University of Kentucky, Lexington, KY 40506-0044, USA |
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0376-6357 |
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PMID:15518989 |
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228 |
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Author |
Petruso, E.J.; Fuchs, T.; Bingman, V.P. |
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Title |
Time-space learning in homing pigeons (Columba livia): orientation to an artificial light source |
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Journal Article |
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Year |
2007 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
10 |
Issue |
2 |
Pages |
181-188 |
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Keywords |
Animals; Circadian Rhythm; Columbidae/*physiology; Homing Behavior/physiology; Learning/*physiology; *Light; Orientation/*physiology; Space Perception/*physiology; Time Perception/*physiology |
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Abstract |
Time-space learning reflects an ability to represent in memory event-stimulus properties together with the place and time of the event; a capacity well developed in birds. Homing pigeons were trained in an indoor octagonal arena to locate one food goal in the morning and a different food goal in the late afternoon. The goals differed with respect to their angular/directional relationship to an artificial light source located outside the arena. Further, the angular difference in reward position approximated the displacement of the sun's azimuth that would occur during the same time period. The experimental birds quickly learned the task, demonstrating the apparent ease with which birds can adopt an artificial light source to discriminate among alternative spatial responses at different times of the day. However, a novel midday probe session following successful learning revealed that the light source was interpreted as a stable landmark and not as a surrogate sun that would support compass orientation. Probe sessions following a phase shift of the light-dark cycle revealed that the mechanism employed to make the temporal discrimination was prevailingly based on an endogenous circadian rhythm and not an interval timing mechanism. |
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Department of Psychology and J.P. Scott Center for Neuroscience, Mind and Behavior Bowling Green State University, Bowling Green, OH 43403, USA |
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1435-9448 |
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PMID:17160343 |
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Equine Behaviour @ team @ |
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2432 |
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Watanabe, S.; Troje, N.F. |
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Towards a “virtual pigeon”: a new technique for investigating avian social perception |
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Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
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4 |
Pages |
271-279 |
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Animals; Behavioral Research/instrumentation/methods; Columbidae/*physiology; Computer Graphics; *Computer Simulation; Discrimination Learning/*physiology; Generalization (Psychology)/*physiology; Pattern Recognition, Visual/*physiology; Perceptual Masking/physiology; Rats; Recognition (Psychology)/physiology; *Social Behavior; User-Computer Interface |
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The purpose of the present study is to examine the applicability of a computer-generated, virtual animal to study animal cognition. Pigeons were trained to discriminate between movies of a real pigeon and a rat. Then, they were tested with movies of the computer-generated (CG) pigeon. Subjects showed generalization to the CG pigeon, however, they also responded to modified versions in which the CG pigeon was showing impossible movement, namely hopping and walking without its head bobbing. Hence, the pigeons did not attend to these particular details of the display. When they were trained to discriminate between the normal and the modified version of the CG pigeon, they were able to learn the discrimination. The results of an additional partial occlusion test suggest that the subjects used head movement as a cue for the usual vs. unusual CG pigeon discrimination. |
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Department of Psychology, Keio University, Mita 2-15-45, Minato-ku, Tokyo, 108, Japan. swat@flet.keio.ac.jp |
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1435-9448 |
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PMID:17024508 |
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no |
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Equine Behaviour @ team @ |
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2437 |
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Author |
Lea, S.E.G.; Goto, K.; Osthaus, B.; Ryan, C.M.E. |
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Title |
The logic of the stimulus |
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Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
Issue |
4 |
Pages |
247-256 |
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Animals; Behavior, Animal/*physiology; Cognition/*physiology; Columbidae; Comprehension/physiology; Dogs; Humans; *Logic; Pattern Recognition, Visual/physiology; Perception/*physiology; Problem Solving/*physiology; Species Specificity |
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This paper examines the contribution of stimulus processing to animal logics. In the classic functionalist S-O-R view of learning (and cognition), stimuli provide the raw material to which the organism applies its cognitive processes-its logic, which may be taxon-specific. Stimuli may contribute to the logic of the organism's response, and may do so in taxon-specific ways. Firstly, any non-trivial stimulus has an internal organization that may constrain or bias the way that the organism addresses it; since stimuli can only be defined relative to the organism's perceptual apparatus, and this apparatus is taxon-specific, such constraints or biases will often be taxon-specific. Secondly, the representation of a stimulus that the perceptual system builds, and the analysis it makes of this representation, may provide a model for the synthesis and analysis done at a more cognitive level. Such a model is plausible for evolutionary reasons: perceptual analysis was probably perfected before cognitive analysis in the evolutionary history of the vertebrates. Like stimulus-driven analysis, such perceptually modelled cognition may be taxon-specific because of the taxon-specificity of the perceptual apparatus. However, it may also be the case that different taxa are able to free themselves from the stimulus logic, and therefore apply a more abstract logic, to different extents. This thesis is defended with reference to two examples of cases where animals' cognitive logic seems to be isomorphic with perceptual logic, specifically in the case of pigeons' attention to global and local information in visual stimuli, and dogs' failure to comprehend means-end relationships in string-pulling tasks. |
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School of Psychology, Washington Singer Laboratories, University of Exeter, Exeter, EX4 4QG, United Kingdom. s.e.g.lea@exeter.ac.uk |
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1435-9448 |
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PMID:16909234 |
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Equine Behaviour @ team @ |
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2450 |
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Author |
Martin, T.I.; Zentall, T.R. |
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Title |
Post-choice information processing by pigeons |
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Journal Article |
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Year |
2005 |
Publication |
Animal cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
8 |
Issue |
4 |
Pages |
273-278 |
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Keywords |
Animals; *Behavior, Animal; *Choice Behavior; *Columbidae; Discrimination Learning |
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Abstract |
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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Author |
Blaisdell, A.P.; Cook, R.G. |
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Title |
Integration of spatial maps in pigeons |
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Journal Article |
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Year |
2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
8 |
Issue |
1 |
Pages |
7-16 |
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Keywords |
Animals; Appetitive Behavior/physiology; Association Learning/*physiology; Columbidae/*physiology; Conditioning, Classical/physiology; *Cues; Problem Solving/*physiology; Space Perception/*physiology; Spatial Behavior/physiology |
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Abstract |
The integration of spatial maps in pigeons was investigated using a spatial analog to sensory preconditioning. The pigeons were tested in an open-field arena in which they had to locate hidden food among a 4x4 grid of gravel-filled cups. In phase 1, the pigeons were exposed to a consistent spatial relationship (vector) between landmark L (a red L-shaped block of wood), landmark T (a blue T-shaped block of wood) and the hidden food goal. In phase 2, the pigeons were then exposed to landmark T with a different spatial vector to the hidden food goal. Following phase 2, pigeons were tested with trials on which they were presented with only landmark L to examine the potential integration of the phase 1 and 2 vectors via their shared common elements. When these test trials were preceded by phase 1 and phase 2 reminder trials, pigeons searched for the goal most often at a location consistent with their integration of the L-->T phase 1 and T-->phase 2 goal vectors. This result indicates that integration of spatial vectors acquired during phases 1 and 2 allowed the pigeons to compute a novel L-->goal vector. This suggests that spatial maps may be enlarged by successively integrating additional spatial information through the linkage of common elements. |
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Department of Psychology, University of California, Los Angeles, 1285 Franz Hall, Box 951563, Los Angeles, CA 90095-1563, USA. blaisdell@psych.ucla.edu |
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1435-9448 |
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PMID:15221636 |
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Equine Behaviour @ team @ |
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2521 |
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Goto, K.; Wills, A.J.; Lea, S.E.G. |
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Title |
Global-feature classification can be acquired more rapidly than local-feature classification in both humans and pigeons |
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Journal Article |
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Year |
2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
7 |
Issue |
2 |
Pages |
109-113 |
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Keywords |
Adult; Animals; Behavior, Animal/physiology; *Classification; Columbidae/*physiology; *Discrimination Learning; Form Perception; Humans; *Mental Processes; *Pattern Recognition, Visual; Species Specificity |
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Abstract |
When humans process visual stimuli, global information often takes precedence over local information. In contrast, some recent studies have pointed to a local precedence effect in both pigeons and nonhuman primates. In the experiment reported here, we compared the speed of acquisition of two different categorizations of the same four geometric figures. One categorization was on the basis of a local feature, the other on the basis of a readily apparent global feature. For both humans and pigeons, the global-feature categorization was acquired more rapidly. This result reinforces the conclusion that local information does not always take precedence over global information in nonhuman animals. |
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School of Psychology, Washington Singer Laboratories, University of Exeter, EX4 4QG, Exeter, UK. K.Goto@exeter.ac.uk |
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1435-9448 |
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PMID:15069610 |
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Equine Behaviour @ team @ |
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2530 |
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Author |
Fairhurst, S.; Gallistel, C.R.; Gibbon, J. |
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Title |
Temporal landmarks: proximity prevails |
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Journal Article |
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Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
6 |
Issue |
2 |
Pages |
113-120 |
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Animals; Columbidae; Conditioning, Operant; Reaction Time; *Time Perception |
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Abstract |
Subjects in conditioning experiments time their conditioned responses relative to the onsets of the conditioned stimuli (CSs). These onsets are temporal landmarks, by reference to which subjects may estimate the location of the unconditioned stimulus (US) in time. In a serial compound conditioning paradigm, a long duration CS comes on first, followed later by a second shorter CS, creating both a long-range and a short-range predictor of the US. We ask whether displacing the short-range predictor relative to the long-range predictor causes subjects to strike a compromise between the different temporal locations predicted by the two CSs. In three experiments with pigeons, we varied the training conditions so as to favor or militate against this outcome. However, in all conditions, there was no compromise; after the onset of the displaced short-range CS, the timing of conditioned responding was governed by it alone. This result contrasts with the compromises that are seen when the feeding time predicted by a CS is put in conflict with the time predicted by the circadian clock, and with the similar compromises sometimes seen when a nearby spatial landmark is displaced relative to a larger spatial context. |
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New York State Psychiatric Institute, 1051 Riverside Dr., Unit 50, New York, NY 10032, USA |
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1435-9448 |
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PMID:12720110 |
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Equine Behaviour @ team @ |
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2573 |
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Author |
Singer, R.A.; Klein, E.D.; Zentall, T.R. |
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Title |
Use of a single-code/default strategy by pigeons to acquire duration sample discriminations |
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Journal Article |
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Year |
2006 |
Publication |
Learning & behavior : a Psychonomic Society publication |
Abbreviated Journal |
Learn Behav |
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34 |
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4 |
Pages |
340-347 |
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Animals; Behavior, Animal/*physiology; Columbidae; *Discrimination (Psychology); *Reaction Time; Retention (Psychology); *Signal Detection (Psychology) |
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Past evidence that pigeons may adopt a single-code/default strategy to solve duration sample discriminations may be attributable to the similarity between the intertrial interval (ITI) and the retention interval. The present experiments tested whether pigeons would adopt a single-code/default strategy when possible ITI-retention-interval ambiguity was eliminated and sample salience was increased. Previous studies of duration sample discriminations that have purported to show evidence for the use of a single-code/default coding strategy have used durations of 0, 2, and 10 sec (Zentall, Klein, and Singer, 2004). However, the results of Experiment 1 suggest that the use of a 0-sec sample may produce an artifact resulting in inadvertent present/absent sample matching. In Experiment 2, when pigeons were trained with three nonzero duration samples (2, 8, and 32 sec), clear evidence for the use of a single-code/default strategy was found. |
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Department of Psychology, University of Kentucky, Lexington, KY 40506-0044, USA. rasing2@uky.edu |
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1543-4494 |
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PMID:17330523 |
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refbase @ user @ |
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215 |
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Nguyen, N.H.; Klein, E.D.; Zentall, T.R. |
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Title |
Imitation of a two-action sequence by pigeons |
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Journal Article |
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Year |
2005 |
Publication |
Psychonomic bulletin & review |
Abbreviated Journal |
Psychon Bull Rev |
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12 |
Issue |
3 |
Pages |
514-518 |
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Animals; Behavior, Animal; *Cognition; Columbidae; *Imitative Behavior; *Learning |
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Developmental psychologists have described imitation as a process that suggests perspective-taking abilities. However, imitative behavior has been found in animals, which are generally not considered capable of taking the perspective of another. Previous studies with birds have demonstrated the imitation of a single response (sometimes referred to as action-level imitation). In the present experiment, we examined the extent to which pigeons would imitate an unfamiliar sequence of two behaviors (sometimes referred to as program-level imitation). Our results indicate that, although there are individual differences, pigeons show a significant tendency to match a demonstrated sequence of behavior involving, first, a response to a treadle (pecking at it or stepping on it) and, second, pushing aside a screen that blocks access to food (a left-vs.-right push). |
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University of Kentucky, Lexington, Kentucky 40506, USA |
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1069-9384 |
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PMID:16235638 |
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refbase @ user @ |
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221 |
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