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Author |
Nakamura, K. |
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Title |
Perseverative errors in object discrimination learning by aged Japanese monkeys (Macaca fuscata) |
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Journal Article |
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Year ![sorted by Year field, ascending order (up)](img/sort_asc.gif) |
2001 |
Publication |
Journal of Experimental Psychology. Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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27 |
Issue |
4 |
Pages |
345-353 |
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Keywords |
Age Factors; Animals; Behavior, Animal/physiology; Cognition Disorders/*diagnosis/*physiopathology; Discrimination Learning/*physiology; Frontal Lobe/*physiopathology; Macaca; Neuropsychological Tests |
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Abstract |
To examine the nature of age-dependent cognitive decline, performance in terms of concurrent object discriminations was assessed in aged and nonaged Japanese monkeys (Macaca fuscata). Aged monkeys required more sessions and committed more errors than nonaged ones in the discriminations, even in simple object discriminations. Analyses of errors suggest that aged monkeys repeated the same errors and committed more errors when they chose a negative object at the 1st trial. A hypothesis analysis of behavior suggests that their incorrect choices were mainly due to object preference. Therefore, the impairment was probably caused by a failure to inhibit inappropriate responses. Together with previous neuropsychological findings, deficits of aged monkeys in the performance of object discriminations can be explained by dysfunction of the frontal cortex. |
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Department of Behavioral and Brain Sciences, Primate Research Institute, Kyoto University, Inuyama, Aichi 484-8506, Japan. knakamur@pri.kyoto-u.ac.jp |
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0097-7403 |
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PMID:11676085 |
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Equine Behaviour @ team @ |
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2771 |
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Author |
Fagot, J.; Wasserman, E.A.; Young, M.E. |
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Title |
Discriminating the relation between relations: the role of entropy in abstract conceptualization by baboons (Papio papio) and humans (Homo sapiens) |
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Journal Article |
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2001 |
Publication |
Journal of Experimental Psychology. Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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27 |
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4 |
Pages |
316-328 |
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Keywords |
Animals; Behavior, Animal; Choice Behavior; Cognition/physiology; *Discrimination (Psychology); Discrimination Learning; *Entropy; Female; Humans; Judgment/*physiology; Male; Papio |
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Two baboons (Papio papio) successfully learned relational matching-to-sample: They picked the choice display that involved the same relation among 16 pictures (same or different) as the sample display, although the sample display shared no pictures with the choice displays. The baboons generalized relational matching behavior to sample displays created from novel pictures. Further experiments varying the number of sample pictures and the mixture of same and different sample pictures suggested that entropy plays a key role in the baboons' conceptual behavior. Two humans (Homo sapiens) were similarly trained and tested; their behavior was both similar to and different from the baboons' behavior. The results suggest that animals other than humans and chimpanzees can discriminate the relation between relations. They further suggest that entropy detection may underlie same-different conceptualization, but that additional processes may participate in human conceptualization. |
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Comparative Cognition Research Group, Center for Research in Cognitive Neurosciences, 31 Chemin Joseph Aiguier, 13402 Marseille, France. fagot@lnf.cnrs-mrs.fr |
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PMID:11676083 |
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Equine Behaviour @ team @ |
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2772 |
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Author |
Schwartz, B.L.; Evans, S. |
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Title |
Episodic memory in primates |
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Journal Article |
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2001 |
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American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
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55 |
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2 |
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71-85 |
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Animals; Behavior, Animal; *Discrimination Learning; Hominidae/*psychology; Humans; *Memory; Self Concept |
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Episodic memory refers to a system of memory with the capacity to recollect specific events from an individual's life. Some psychologists have suggested that episodic memory is a uniquely human phenomenon. We challenge that idea and present evidence that great apes and other primates may possess episodic-like memory. We review criteria developed to assess episodic-like memory in nonhumans, and how they apply to primates. In particular, we discuss the criteria of Clayton et al. [2001], who stated that episodic-like memory is based on the retrieval of multiple and integrated components of an event. We then review eight studies examining memory in great apes and apply the Clayton et al. criteria to each of them. We summarize the evidence that is compatible with the existence of episodic-like memory, although none of the data completely satisfy the Clayton et al. criteria. Morover, feelings of pastness and feelings of confidence, which mark episodic memory in humans, have not been empirically addressed in nonhuman primates. Future studies should be directed at these aspects of memory in primates. We speculate on the functional significance of episodic memory in nonhuman primates. |
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Dept of Psychology, Florida International University, Miami, Florida 33199, USA. SchwartB@fiu.edu |
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0275-2565 |
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PMID:11668526 |
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Equine Behaviour @ team @ |
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4115 |
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Zentall, T.R.; Galizio, M.; Critchfied, T.S. |
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Title |
Categorization, concept learning, and behavior analysis: an introduction |
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Journal Article |
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2002 |
Publication |
Journal of the experimental analysis of behavior |
Abbreviated Journal |
J Exp Anal Behav |
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Volume |
78 |
Issue |
3 |
Pages |
237-248 |
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Keywords |
Animals; Association Learning; *Concept Formation; *Discrimination Learning; Humans; Language |
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Categorization and concept learning encompass some of the most important aspects of behavior, but historically they have not been central topics in the experimental analysis of behavior. To introduce this special issue of the Journal of the Experimental Analysis of Behavior (JEAB), we define key terms; distinguish between the study of concepts and the study of concept learning; describe three types of concept learning characterized by the stimulus classes they yield; and briefly identify several other themes (e.g., quantitative modeling and ties to language) that appear in the literature. As the special issue demonstrates, a surprising amount and diversity of work is being conducted that either represents a behavior-analytic perspective or can inform or constructively challenge this perspective. |
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Department of Psychology, University of Kentucky, Lexington 40506, USA. zentall@pop.uky.edu |
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0022-5002 |
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PMID:12507002 |
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no |
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Call Number |
refbase @ user @ |
Serial |
236 |
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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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2002 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
28 |
Issue |
4 |
Pages |
416-422 |
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Keywords |
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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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 |
Akins, C.K.; Klein, E.D.; Zentall, T.R. |
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Title |
Imitative learning in Japanese quail (Coturnix japonica) using the bidirectional control procedure |
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Journal Article |
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2002 |
Publication |
Animal learning & behavior |
Abbreviated Journal |
Anim Learn Behav |
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30 |
Issue |
3 |
Pages |
275-281 |
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Animals; Attention; Behavior, Animal; Coturnix; *Discrimination Learning; *Imitative Behavior; Male; Smell |
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In the bidirectional control procedure, observers are exposed to a conspecific demonstrator responding to a manipulandum in one of two directions (e.g., left vs. right). This procedure controls for socially mediated effects (the mere presence of a conspecific) and stimulus enhancement (attention drawn to a manipulandum by its movement), and it has the added advantage of being symmetrical (the two different responses are similar in topography). Imitative learning is demonstrated when the observers make the response in the direction that they observed it being made. Recently, however, it has been suggested that when such evidence is found with a predominantly olfactory animal, such as the rat, it may result artifactually from odor cues left on one side of the manipulandum by the demonstrator. In the present experiment, we found that Japanese quail, for which odor cues are not likely to play a role, also showed significant correspondence between the direction in which the demonstrator and the observer push a screen to gain access to reward. Furthermore, control quail that observed the screen move, when the movement of the screen was not produced by the demonstrator, did not show similar correspondence between the direction of screen movement observed and that performed by the observer. Thus, with the appropriate control, the bidirectional procedure appears to be useful for studying imitation in avian species. |
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University of Kentucky, Lexington, Kentucky 40506-0044, USA |
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0090-4996 |
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PMID:12391793 |
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no |
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Call Number |
refbase @ user @ |
Serial |
239 |
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Author |
Dorrance, B.R.; Zentall, T.R. |
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Title |
Imitation of conditional discriminations in pigeons (Columba livia) |
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Journal Article |
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2002 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
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116 |
Issue |
3 |
Pages |
277-285 |
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Animals; Behavior, Animal/physiology; Columbidae; Conditioning (Psychology)/*physiology; Discrimination Learning/*physiology; Habituation, Psychophysiologic; *Imitative Behavior; Light; Reinforcement (Psychology) |
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In the present experiments, the 2-action method was used to determine whether pigeons could learn to imitate a conditional discrimination. Demonstrator pigeons (Columba livia) stepped on a treadle in the presence of 1 light and pecked at the treadle in the presence of another light. Demonstration did not seem to affect acquisition of the conditional discrimination (Experiment 1) but did facilitate its reversal of the conditional discrimination (Experiments 2 and 3). The results suggest that pigeons are not only able to learn a specific behavior by observing another pigeon, but they can also learn under which circumstances to perform that behavior. The results have implications for proposed mechanisms of imitation in animals. |
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Department of Psychology, Augustana College, Rock Island, Illinois 61201, USA. psdorrance@augustana.edu |
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0735-7036 |
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PMID:12234078 |
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no |
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refbase @ user @ |
Serial |
240 |
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Author |
Clement, T.S.; Zentall, T.R. |
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Title |
Second-order contrast based on the expectation of effort and reinforcement |
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Journal Article |
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2002 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
28 |
Issue |
1 |
Pages |
64-74 |
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Animals; Columbidae; Discrimination Learning; Random Allocation; *Reinforcement (Psychology) |
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Pigeons prefer signals for reinforcement that require greater effort (or time) to obtain over those that require less effort to obtain (T. S. Clement, J. Feltus, D. H. Kaiser, & T. R. Zentall, 2000). Preference was attributed to contrast (or to the relatively greater improvement in conditions) produced by the appearance of the signal when it was preceded by greater effort. In Experiment 1, the authors of the present study demonstrated that the expectation of greater effort was sufficient to produce such a preference (a second-order contrast effect). In Experiments 2 and 3, low versus high probability of reinforcement was substituted for high versus low effort, respectively, with similar results. In Experiment 3, the authors found that the stimulus preference could be attributed to positive contrast (when the discriminative stimuli represented an improvement in the probability of reinforcement) and perhaps also negative contrast (when the discriminative stimuli represented reduction in the probability of reinforcement). |
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Department of Psychology, University of Kentucky, Lexington, Kentucky 40506-0044, USA |
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0097-7403 |
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PMID:11868235 |
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refbase @ user @ |
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241 |
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Author |
Zentall, T.R.; Clement, T.S. |
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Title |
Memory mechanisms in pigeons: evidence of base-rate neglect |
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Journal Article |
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2002 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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28 |
Issue |
1 |
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111-115 |
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Animals; Columbidae; Discrimination Learning; Memory/*physiology; Random Allocation; Reaction Time; Reinforcement (Psychology); Retention (Psychology) |
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In delayed matching to sample, once acquired, pigeons presumably choose comparisons according to their memory for (the strength of) the sample. When memory for the sample is sufficiently weak, comparison choice should depend on the history of reinforcement associated with each of the comparison stimuli. In the present research, pigeons acquired two matching tasks in which Sample S1 was associated with one comparison from each task, C1 and C3, whereas Sample S2 was associated with Comparison C2, and Sample S3 was associated with Comparison C4. As the retention interval increased, the pigeons showed a bias to choose the comparison (C1 or C3) associated with the more frequently occurring sample (S1). Thus, pigeons were sensitive also to the (irrelevant) likelihood that each of the samples was presented. The results suggest that pigeons may allow their reference memory for the overall sample frequency to influence comparison choice, independent of the comparison stimuli present. |
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Department of Psychology, University of Kentucky, Lexington, Kentucky 40506-0044, USA. zentall@pop.uky.edu |
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PMID:11868229 |
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refbase @ user @ |
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242 |
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Author |
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 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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5 |
Issue |
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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