Records |
Author |
Dorrance, B.R.; Zentall, T.R. |
Title |
Imitation of conditional discriminations in pigeons (Columba livia) |
Type |
Journal Article |
Year |
2002 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
Volume |
116 |
Issue |
3 |
Pages |
277-285 |
Keywords |
Animals; Behavior, Animal/physiology; Columbidae; Conditioning (Psychology)/*physiology; Discrimination Learning/*physiology; Habituation, Psychophysiologic; *Imitative Behavior; Light; Reinforcement (Psychology) |
Abstract |
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. |
Address |
Department of Psychology, Augustana College, Rock Island, Illinois 61201, USA. psdorrance@augustana.edu |
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ISSN |
0735-7036 |
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PMID:12234078 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
240 |
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Author |
Clement, T.S.; Zentall, T.R. |
Title |
Second-order contrast based on the expectation of effort and reinforcement |
Type |
Journal Article |
Year |
2002 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
Volume |
28 |
Issue |
1 |
Pages |
64-74 |
Keywords |
Animals; Columbidae; Discrimination Learning; Random Allocation; *Reinforcement (Psychology) |
Abstract |
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). |
Address |
Department of Psychology, University of Kentucky, Lexington, Kentucky 40506-0044, USA |
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0097-7403 |
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Notes |
PMID:11868235 |
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no |
Call Number |
refbase @ user @ |
Serial |
241 |
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Author |
Zentall, T.R.; Clement, T.S. |
Title |
Memory mechanisms in pigeons: evidence of base-rate neglect |
Type |
Journal Article |
Year |
2002 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
Volume |
28 |
Issue |
1 |
Pages |
111-115 |
Keywords |
Animals; Columbidae; Discrimination Learning; Memory/*physiology; Random Allocation; Reaction Time; Reinforcement (Psychology); Retention (Psychology) |
Abstract |
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. |
Address |
Department of Psychology, University of Kentucky, Lexington, Kentucky 40506-0044, USA. zentall@pop.uky.edu |
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0097-7403 |
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PMID:11868229 |
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no |
Call Number |
refbase @ user @ |
Serial |
242 |
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Author |
Macphail, E.M. |
Title |
Cognitive function in mammals: the evolutionary perspective |
Type |
Journal Article |
Year |
1996 |
Publication |
Brain research. Cognitive brain research |
Abbreviated Journal |
Brain Res Cogn Brain Res |
Volume |
3 |
Issue |
3-4 |
Pages |
279-290 |
Keywords |
Animals; Cognition/*physiology; Conditioning (Psychology)/*physiology; Evolution; Humans; Learning/*physiology; Task Performance and Analysis |
Abstract |
The work of behavioural pharmacologists has concentrated on small animals, such as rodents and pigeons. The validity of extrapolation of their findings to humans depends upon the existence of parallels in both physiology and psychology between these animals and humans. This paper considers the question whether there are in fact substantial cognitive parallels between, first, different non-human groups of vertebrates and, second, non-humans and humans. Behavioural data from 'simple' tasks, such as habituation and conditioning, do not point to species differences among vertebrates. Using examples that concentrate on the performance of rodents and birds, it is argued that, similarly, data from more complex tasks (learning-set formation, transitive inference, and spatial memory serve as examples) reveal few if any cognitive differences amongst non-human vertebrates. This conclusion supports the notion that association formation may be the critical problem-solving process available to non-human animals; associative mechanisms are assumed to have evolved to detect causal links between events, and would therefore be relevant in all ecological niches. In agreement with this view, recent advances in comparative neurology show striking parallels in functional organisation of mammalian and avian telencephalon. Finally, it is argued that although the peculiarly human capacity for language marks a large cognitive contrast between humans and non-humans, there is good evidence-in particular, from work on implicit learning--that the learning mechanisms available to non--humans are present and do play an important role in human cognition. |
Address |
Department of Psychology, University of York at Heslington, UK |
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ISSN |
0926-6410 |
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PMID:8806029 |
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no |
Call Number |
refbase @ user @ |
Serial |
603 |
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Author |
Dorrance, B.R.; Zentall, T.R. |
Title |
Imitative learning in Japanese quail (Coturnix japonica) depends on the motivational state of the observer quail at the time of observation |
Type |
Journal Article |
Year |
2001 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
Volume |
115 |
Issue |
1 |
Pages |
62-67 |
Keywords |
Animals; *Behavior, Animal; *Coturnix; Female; *Imitative Behavior; *Learning; Male; *Motivation; Reinforcement (Psychology); Time Factors |
Abstract |
The 2-action method was used to examine whether imitative learning in Japanese quail (Coturnix japonica) depends on the motivational state of the observer quail at the time of observation of the demonstrated behavior. Two groups of observers were fed before observation (satiated groups), whereas 2 other groups of observers were deprived of food before observation (hungry groups). Quail were tested either immediately following observation or after a 30-min delay. Results indicated that quail in the hungry groups imitated, whereas those in the satiated groups did not, regardless of whether their test was immediate or delayed. The results suggest that observer quail may not learn (through observation) behavior that leads to a reinforcer for which they are unmotivated at the time of test. In addition, the results show that quail are able to delay the performance of a response acquired through observation (i.e., they show deferred imitation). |
Address |
Department of Psychology, University of Kentucky, Lexington 40506-0044, USA |
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0735-7036 |
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Notes |
PMID:11334220 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
245 |
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Author |
Clement, T.S.; Zentall, T.R. |
Title |
Development of a single-code/default coding strategy in pigeons |
Type |
Journal Article |
Year |
2000 |
Publication |
Psychological science : a journal of the American Psychological Society / APS |
Abbreviated Journal |
Psychol Sci |
Volume |
11 |
Issue |
3 |
Pages |
261-264 |
Keywords |
Animals; Attention; Columbidae; *Discrimination Learning; Female; Male; *Pattern Recognition, Visual; *Problem Solving; Retention (Psychology) |
Abstract |
We tested the hypothesis that pigeons could use a cognitively efficient coding strategy by training them on a conditional discrimination (delayed symbolic matching) in which one alternative was correct following the presentation of one sample (one-to-one), whereas the other alternative was correct following the presentation of any one of four other samples (many-to-one). When retention intervals of different durations were inserted between the offset of the sample and the onset of the choice stimuli, divergent retention functions were found. With increasing retention interval, matching accuracy on trials involving any of the many-to-one samples was increasingly better than matching accuracy on trials involving the one-to-one sample. Furthermore, following this test, pigeons treated a novel sample as if it had been one of the many-to-one samples. The data suggest that rather than learning each of the five sample-comparison associations independently, the pigeons developed a cognitively efficient single-code/default coding strategy. |
Address |
Department of Psychology, University of Kentucky, Lexington, KY 40506, USA |
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ISSN |
0956-7976 |
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Notes |
PMID:11273414 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
246 |
Permanent link to this record |
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Author |
Clement, T.S.; Feltus, J.R.; Kaiser, D.H.; Zentall, T.R. |
Title |
“Work ethic” in pigeons: reward value is directly related to the effort or time required to obtain the reward |
Type |
Journal Article |
Year |
2000 |
Publication |
Psychonomic bulletin & review |
Abbreviated Journal |
Psychon Bull Rev |
Volume |
7 |
Issue |
1 |
Pages |
100-106 |
Keywords |
Animals; Behavior, Animal/*physiology; Cognition/physiology; Columbidae; Discrimination Learning/physiology; Female; Male; Reinforcement (Psychology); *Reward; Time Factors |
Abstract |
Stimuli associated with less effort or with shorter delays to reinforcement are generally preferred over those associated with greater effort or longer delays to reinforcement. However, the opposite appears to be true of stimuli that follow greater effort or longer delays. In training, a simple simultaneous discrimination followed a single peck to an initial stimulus (S+FR1 S-FR1) and a different simple simultaneous discrimination followed 20 pecks to the initial stimulus (S+FR20 S-FR20). On test trials, pigeons preferred S+FR20 over S+FR1 and S-FR20 over S-FR1. These data support the view that the state of the animal immediately prior to presentation of the discrimination affects the value of the reinforcement that follows it. This contrast effect is analogous to effects that when they occur in humans have been attributed to more complex cognitive and social factors. |
Address |
University of Kentucky, Lexington, USA |
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ISSN |
1069-9384 |
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Notes |
PMID:10780022 |
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no |
Call Number |
refbase @ user @ |
Serial |
248 |
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Author |
Lonon, A.M.; Zentall, T.R. |
Title |
Transfer of value from S+ to S- in simultaneous discriminations in humans |
Type |
Journal Article |
Year |
1999 |
Publication |
The American journal of psychology |
Abbreviated Journal |
Am J Psychol |
Volume |
112 |
Issue |
1 |
Pages |
21-39 |
Keywords |
Adolescent; Adult; Animals; Color Perception; Columbidae; Conditioning, Classical; *Discrimination Learning; Female; Humans; Male; Middle Aged; *Motivation; Orientation; Pattern Recognition, Visual; Psychomotor Performance; Reaction Time; *Transfer (Psychology) |
Abstract |
When animals learn a simultaneous discrimination, some of the value of the positive stimulus (S+) appears to transfer to the negative stimulus (S-). The present experiments demonstrate that such value transfer can also be found in humans. In Experiment 1 humans were trained on 2 simple simultaneous discriminations, the first between a highly positive stimulus, A (1,000 points); and a negative stimulus, B (0 points); and the second between a less positive stimulus, C (100 points); and a negative stimulus, D (0 points). On test trials, most participants preferred B over D. In Experiments 2 and 3 the value of the 2 original discriminations was equated in training (A[100]B[0] and C[100]D[0]). In Experiment 2 the values of the positive stimuli were then altered (A[1,000]C[0]); again, most participants preferred B over D. In Experiment 3, however, when the values of B and D were altered (B[1,000]D[0]), participants were indifferent to A and C. Thus, the mechanism that underlies value transfer in humans appears to be related to Pavlovian second-order conditioning. Similar mechanisms may be involved in assimilation processes in social contexts. |
Address |
University of Kentucky, USA |
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0002-9556 |
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Notes |
PMID:10696277 |
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no |
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refbase @ user @ |
Serial |
249 |
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Author |
Zentall, T.R.; Riley, D.A. |
Title |
Selective attention in animal discrimination learning |
Type |
Journal Article |
Year |
2000 |
Publication |
The Journal of general psychology |
Abbreviated Journal |
J Gen Psychol |
Volume |
127 |
Issue |
1 |
Pages |
45-66 |
Keywords |
Animals; Attention/*physiology; Behavior, Animal/physiology; Conditioning (Psychology)/physiology; Cues; Discrimination Learning/*physiology; Generalization, Response; Rats |
Abstract |
The traditional approach to the study of selective attention in animal discrimination learning has been to ask if animals are capable of the central selective processing of stimuli, such that certain aspects of the discriminative stimuli are partially or wholly ignored while their relationships to each other, or other relevant stimuli, are processed. A notable characteristic of this research has been that procedures involve the acquisition of discriminations, and the issue of concern is whether learning is selectively determined by the stimulus dimension defined by the discriminative stimuli. Although there is support for this kind of selective attention, in many cases, simpler nonattentional accounts are sufficient to explain the results. An alternative approach involves procedures more similar to those used in human information-processing research. When selective attention is studied in humans, it generally involves the steady state performance of tasks for which there is limited time allowed for stimulus input and a relatively large amount of relevant information to be processed; thus, attention must be selective or divided. When this approach is applied to animals and alternative accounts have been ruled out, stronger evidence for selective or divided attention in animals has been found. Similar processes are thought to be involved when animals search more natural environments for targets. Finally, an attempt is made to distinguish these top-down attentional processes from more automatic preattentional processes that have been studied in humans and other animals. |
Address |
Department of Psychology, University of Kentucky, Lexington 40506, USA. Zentall@pop.uky.edu |
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0022-1309 |
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PMID:10695951 |
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no |
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refbase @ user @ |
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250 |
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Author |
Zentall, T.R. |
Title |
Support for a theory of memory for event duration must distinguish between test-trial ambiguity and actual memory loss |
Type |
Journal Article |
Year |
1999 |
Publication |
Journal of the experimental analysis of behavior |
Abbreviated Journal |
J Exp Anal Behav |
Volume |
72 |
Issue |
3 |
Pages |
467-472 |
Keywords |
Animals; Behavior, Animal/physiology; Columbidae; Conditioning, Operant/physiology; Discrimination Learning/physiology; Memory/*physiology; *Psychological Theory; Time Factors; Time Perception/physiology |
Abstract |
Staddon and Higa's (1999) trace-strength theory of timing and memory for event duration can account for pigeons' bias to “choose short” when retention intervals are introduced and to “choose long” when, following training with a fixed retention interval, retention intervals are shortened. However, it does not account for the failure of pigeons to choose short when the intertrial interval is distinct from the retention interval. That finding suggests that stimulus generalization (or ambiguity) between the intertrial interval and the retention interval may result in an effect that has been attributed to memory loss. Such artifacts must be eliminated before a theory of memory for event duration can be adequately tested. |
Address |
Department of Psychology, University of Kentucky, Lexington 40506, USA. zentall@pop.uky.edu |
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0022-5002 |
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PMID:10605105 |
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refbase @ user @ |
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251 |
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