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Author  |
Clement, T.S.; Weaver, J.E.; Sherburne, L.M.; Zentall, T.R. |
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Title |
Simultaneous discrimination learning in pigeons: value of S- affects the relative value of its associated S+ |
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Journal Article |
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Year |
1998 |
Publication |
The Quarterly journal of experimental psychology. B, Comparative and physiological psychology |
Abbreviated Journal |
Q J Exp Psychol B |
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Volume |
51 |
Issue |
4 |
Pages |
363-378 |
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Keywords |
Animals; *Attention; Color Perception; Columbidae; *Discrimination Learning; Female; Male; *Motivation; Orientation; Transfer (Psychology) |
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Abstract |
In a simple simultaneous discrimination involving a positive stimulus (S+) and a negative stimulus (S-), it has been hypothesized that positive value can transfer from the S+ to the S- (thus increasing the relative value of the S-) and also that negative value can transfer from the S- to the S+ (thus diminishing the relative value of the S+; Fersen, Wynne, Delius, & Staddon, 1991). Evidence for positive value transfer has been reported in pigeons (e.g. Zentall & Sherburne, 1994). The purpose of the present experiments was to determine, in a simultaneous discrimination, whether the S- diminishes the value of the S+ or the S- is contrasted with the S+ (thus enhancing the value of the S+). In two experiments, we found evidence for contrast, rather than value transfer, attributable to simultaneous discrimination training. Thus, not only does the S+ appear to enhance the value of the S-, but the S- appears to enhance rather than reduce the value of the S+. |
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Department of Psychology, University of Kentucky, Lexington 40506-0044, USA |
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0272-4995 |
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PMID:9854439 |
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no |
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refbase @ user @ |
Serial |
252 |
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Author |
Zentall, T.R.; Roper, K.L.; Sherburne, L.M. |
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Title |
Most directed forgetting in pigeons can be attributed to the absence of reinforcement on forget trials during training or to other procedural artifacts |
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Journal Article |
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Year |
1995 |
Publication |
Journal of the experimental analysis of behavior |
Abbreviated Journal |
J Exp Anal Behav |
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Volume |
63 |
Issue |
2 |
Pages |
127-137 |
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Keywords |
Animals; *Attention; Color Perception; Columbidae; Cues; *Discrimination Learning; *Mental Recall; Motivation; Pattern Recognition, Visual; *Reinforcement Schedule; Retention (Psychology) |
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Abstract |
In research on directed forgetting in pigeons using delayed matching procedures, remember cues, presented in the delay interval between sample and comparisons, have been followed by comparisons (i.e., a memory test), whereas forget cues have been followed by one of a number of different sample-independent events. The source of directed forgetting in delayed matching to sample in pigeons was examined in a 2 x 2 design by independently manipulating whether or not forget-cue trials in training ended with reinforcement and whether or not forget-cue trials in training included a simultaneous discrimination (involving stimuli other than those used in the matching task). Results were consistent with the hypothesis that reinforced responding following forget cues is sufficient to eliminate performance deficits on forget-cue probe trials. Only when reinforcement was omitted on forget-cue trials in training (whether a discrimination was required or not) was there a decrement in accuracy on forget-cue probe trials. When reinforcement is present, however, the pattern of responding established during and following a forget cue in training may also play a role in the directed forgetting effect. These findings support the view that much of the evidence for directed forgetting using matching procedures may result from motivational and behavioral artifacts rather than the loss of memory. |
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Department of Psychology, University of Kentucky, Lexington 40506 |
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0022-5002 |
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PMID:7714447 |
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Call Number |
refbase @ user @ |
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256 |
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Zentall, T.R.; Sherburne, L.M. |
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Title |
Role of differential sample responding in the differential outcomes effect involving delayed matching by pigeons |
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Journal Article |
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Year |
1994 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
20 |
Issue |
4 |
Pages |
390-401 |
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Keywords |
Animals; Behavior, Animal; Choice Behavior; *Columbidae; *Discrimination Learning; Feeding Behavior; Task Performance and Analysis |
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Abstract |
The role of differential sample responding in the differential outcomes effect was examined. In Experiment 1, we trained pigeons on a one-to-many matching task with differential sample responding required. Differential outcomes were associated with samples and comparisons, with comparisons only, or with neither samples nor comparisons. Slopes of delay functions for trials with pecked versus nonpecked samples suggested use of a single-code-default strategy in the nondifferential-outcomes group but not in the differential-outcomes groups. In Experiment 2, differential sample responding and differential outcomes were manipulated independently. Again, there were significant differences in the relative slopes of the delay functions. Results suggest that differential outcomes exert their effect independently of differential sample responding. |
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Department of Psychology, University of Kentucky, Lexington 40506 |
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0097-7403 |
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Notes |
PMID:7964521 |
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no |
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Call Number |
refbase @ user @ |
Serial |
257 |
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Author |
Zentall, T.R.; Sherburne, L.M. |
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Title |
Transfer of value from S+ to S- in a simultaneous discrimination |
Type |
Journal Article |
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Year |
1994 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
20 |
Issue |
2 |
Pages |
176-183 |
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Keywords |
Animals; *Appetitive Behavior; Attention; Color Perception; Columbidae; *Discrimination Learning; Female; Male; Motivation; Orientation; Pattern Recognition, Visual; *Problem Solving; *Reinforcement Schedule; *Transfer (Psychology) |
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Value transfer theory has been proposed to account for transitive inference effects (L. V. Fersen, C. D. L. Wynne, J. D. Delius, & J. E. R. Staddon, 1991), in which following training on 4 simultaneous discriminations (A+B-, B+C-, C+D-, D+E-) pigeons show a preference for B over D. According to this theory, some of the value of reinforcement acquired by each S+ transfers to the S-. In the transitive inference experiment, C (associated with both reward and nonreward) can transfer less value to D than A (associated only with reward) can transfer to B. Support for value transfer theory was demonstrated in 2 experiments in which an S- presented in the context of a stimulus to which responses were always reinforced (S+) was preferred over an S- presented in the context of a stimulus to which responses were sometimes reinforced (S +/-). |
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Department of Psychology, University of Kentucky, Lexington 40506 |
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0097-7403 |
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Notes |
PMID:8189186 |
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no |
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Call Number |
refbase @ user @ |
Serial |
258 |
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Author |
Zentall, T.R.; Sherburne, L.M.; Roper, K.L.; Kraemer, P.J. |
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Title |
Value transfer in a simultaneous discrimination appears to result from within-event pavlovian conditioning |
Type |
Journal Article |
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Year |
1996 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
22 |
Issue |
1 |
Pages |
68-75 |
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Keywords |
Animals; Behavior, Animal; Columbidae; *Conditioning, Classical; *Discrimination Learning; Female; Male; *Reinforcement (Psychology) |
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Abstract |
When pigeons acquire a simple simultaneous discrimination, some of the value acquired by the S+ transfers to the S-. The mechanism underlying this transfer of value was examined in three experiments. In Experiment 1, pigeons trained on two simultaneous discriminations (A + B- and C +/- D-) showed a preference for B over D. This preference was reduced, however, following the devaluation of A. In Experiment 2, when after the same original training, value was given to D, the pigeons' preference for C did not significantly increase. In Experiment 3, when both discriminations involved partial reinforcement (S +/-), A + C- training resulted in a preference for B over D, whereas B + D- training resulted in a preference for A over C. Thus, simultaneous discrimination training appears to result in bidirectional within-event conditioning involving the S+ and S-. |
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Department of Psychology, University of Kentucky Lexington 40506, USA |
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0097-7403 |
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Notes |
PMID:8568497 |
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Call Number |
refbase @ user @ |
Serial |
255 |
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Author |
Zentall, T.R.; Sutton, J.E.; Sherburne, L.M. |
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Title |
True imitative learning in pigeons |
Type |
Journal Article |
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Year |
1996 |
Publication |
Psychol Sci |
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7 |
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Equine Behaviour @ team @ Zentall1996 |
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6372 |
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