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Author Zentall, T.R. doi  openurl
  Title Temporal discrimination learning by pigeons Type Journal Article
  Year 2007 Publication Behavioural processes Abbreviated Journal Behav. Process.  
  Volume 74 Issue 2 Pages 286-292  
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  Abstract Memory for time by animals appears to undergo a systematic shortening. This so-called choose-short effect can be seen in a conditional temporal discrimination when a delay is inserted between the sample and comparison stimuli. We have proposed that this temporal shortening may result from a procedural artifact in which the delay appears similar to the intertrial interval and thus, produces an inadvertent ambiguity or 'instructional failure'. When this ambiguity is avoided by distinguishing the intertrial interval from the delay, as well as the samples from the delay, the temporal shortening effect and other asymmetries often disappear. By avoiding artifacts that can lead to a misinterpretation of results, we may understand better how animals represent time. An alternative procedure for studying temporal discriminations is with the psychophysical bisection procedure in which following conditional discrimination training, intermediate durations are presented and the point of subjective equality is determined. Research using the bisection procedure has shown that pigeons represent temporal durations not only as their absolute value but also relative to durations from which they must be discriminated. Using this procedure, we have also found that time passes subjectively slower when animals are required to respond to the to-be-timed stimulus.  
  Address Department of Psychology, University of Kentucky, Lexington, KY 40506, United States. zentall@uky.edu  
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  ISSN 0376-6357 ISBN Medium  
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  Notes PMID:17110057 Approved no  
  Call Number refbase @ user @ Serial 216  
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Author Zentall, T.R. doi  openurl
  Title Timing, memory for intervals, and memory for untimed stimuli: The role of instructional ambiguity Type Journal Article
  Year 2006 Publication Behavioural processes Abbreviated Journal Behav. Process.  
  Volume 71 Issue 2-3 Pages 88-97  
  Keywords (up)  
  Abstract 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.  
  Address Department of Psychology, University of Kentucky, 202B Kastle Hall, Lexington, KY 40506-0044, USA. zentall@uky.edu  
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  ISSN 0376-6357 ISBN Medium  
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  Notes PMID:16406373 Approved no  
  Call Number refbase @ user @ Serial 219  
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Author Zentall, T.R.; Sutton, J.E.; Sherburne, L.M. url  doi
openurl 
  Title True imitative learning in pigeons Type Journal Article
  Year 1996 Publication Psychol Sci Abbreviated Journal  
  Volume 7 Issue Pages  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Zentall1996 Serial 6372  
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Author Zentall, T.R. openurl 
  Title The case for a cognitive approach to animal learning and behavior Type Journal Article
  Year 2001 Publication Behavioral Processes Abbreviated Journal Behav Processes  
  Volume 54 Issue 1-3 Pages 65-78  
  Keywords (up)  
  Abstract The dangers of hypothesizing about unobservable cognitive mechanisms are well known to behavior analysts. I propose, however, that carefully fashioned cognitive theories that make predictions that are inconsistent with current behavioral theories can provide useful research tools for the understanding of behavior. Furthermore, even if the results of such research may be accommodated by modifying existing behavioral theories, our understanding of behavior is often advanced by the empirical findings because it is unlikely that the research would have been conducted in the absence of such cognitive hypothesizing. Two examples of the development of emergent relations are described: The first deals with the nature of a pigeon's 'representation' of two stimuli both of which are associated with correct responding to a third in a many-to-one matching task (stimulus equivalence or common representations). The second has to do with transitive inference, the emergent relation between two stimuli mediated by their relation to a common stimulus in a simultaneous discrimination.  
  Address Department of Psychology, University of Kentucky, 40506-0044, Lexington, KY, USA  
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  ISSN 0376-6357 ISBN Medium  
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  Notes PMID:11369461 Approved no  
  Call Number Serial 25  
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Author Zentall, T.R.; Hogan, D.E.. doi  openurl
  Title Same/different concept learning in the pigeon: the effect of negative instances and prior adaptation to transfer stimuli Type Journal Article
  Year 1978 Publication Abbreviated Journal J Exp Anal Behav  
  Volume 30 Issue 2 Pages 177-186  
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  Abstract Pigeons were trained on a matching-to-sample or oddity-from-sample task with shapes (circle and plus). Half of each group was exposed to “negative instance” trials i.e., for matching birds, neither comparison key matched the sample, and for oddity birds both comparison keys matched the sample. When all birds were transferred to a new task involving colors (red and green), nonshifted birds (transferred from matching to matching, or oddity to oddity) performed significantly better than shifted birds (transferred from matching to oddity, or oddity to matching), but only if they had experienced negative instances of the training concept. When all birds were exposed to negative instances of the transfer task and then transferred to a new color task (yellow and blue), dramatic transfer effects were observed. The effect of pre-exposure to the yellow and blue colors, in order to reduce transfer-stimulus novelty, had a minor effect on transfer.  
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  ISSN 0022-5002 ISBN Medium  
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  Notes PMID:16812097 Approved no  
  Call Number refbase @ user @ Serial 271  
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Author Zentall, T.R; Hogan, D.E. doi  openurl
  Title Key pecking in pigeons produced by pairing keylight with inaccessible grain Type Journal Article
  Year 1975 Publication Abbreviated Journal J Exp Anal Behav  
  Volume 23 Issue 2 Pages 199-206  
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  Abstract In Experiment I, keylight was paired with inaccessible grain delivery (under two conditions of keylight intensity) to determine if autoshaping would occur in the absence of primary reinforcement. In Experiment II, the procedure was repeated with accessible grain, for comparison. In Experiment III, the procedures were repeated with explicitly unpaired presentations of keylight and either inaccessible or accessible grain. The results indicated that key pecking occurred as quickly in the presence of keylight pairings with inaccessible grain as with accessible grain, though (except for one bird) key pecking was not maintained with inaccessible grain. Furthermore, compared to the dim keylight, the bright keylight greatly suppressed key pecking when paired with inaccessible grain, and reduced the rate of key pecking when paired with accessible grain. Little key pecking occurred in groups exposed to explicitly unpaired presentations of keylight (whether bright or dim) and grain (whether accessible or inaccessible). When the birds in Experiment III were retested with explicitly paired presentations of keylight and grain, little key pecking was observed, suggesting suppressive effects of prior explicitly unpaired presentations. It is suggested that the effects of key-brightness manipulation were produced by the association of grain with cues other than the response key, or by distraction produced by partial illumination of the grain hopper.  
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  ISSN 0022-5002 ISBN Medium  
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  Notes PMID:16811840 Approved no  
  Call Number refbase @ user @ Serial 273  
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Author Zentall, T.R url  doi
openurl 
  Title Imitation In Animals: Evidence, Function, And Mechanisms Type Journal Article
  Year 2001 Publication Cybernetics and Systems Abbreviated Journal Cybern Syst  
  Volume 32 Issue Pages 53-96  
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  Abstract The terms sociallearning and social influence have been used descriptively and theoretically to characterize a broad range of animal behavior from physical antipredatory adaptations such as eye spots, which are totally under genetic control, to the human capacity for the exaggeration of individual characteristics, known as caricature, which are largely under cognitive control. In the present review, the various forms of social influence and social learning are identified and distinghished from imitation, a term that generally has been reserved for behavioral matching that cannot be accounted for using simpler specifically predisposed, motivational, or learning mechanisms. It is suggested that much of the ambiguity in the literature concerning the various forms of social learning can be attributed to the distinction between the function of a behavior and the mechanisms responsible for its occurrence. Finally, the various mechanisms that have been proposed to account for imitative learning are presented and an attempt is made to evaluate them.  
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  Call Number refbase @ user @ Serial 747  
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Author Zentall, S.S.; Zentall, T.R. openurl 
  Title Optimal stimulation: a model of disordered activity and performance in normal and deviant children Type Journal Article
  Year 1983 Publication Psychological bulletin Abbreviated Journal Psychol Bull  
  Volume 94 Issue 3 Pages 446-471  
  Keywords (up) *Arousal; Attention Deficit Disorder with Hyperactivity/*psychology; Autistic Disorder/*psychology; Behavior Therapy; Child; Humans  
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  Series Volume Series Issue Edition  
  ISSN 0033-2909 ISBN Medium  
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  Notes PMID:6657825 Approved no  
  Call Number refbase @ user @ Serial 264  
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Author Zentall, S.S.; Zentall, T.R.; Barack, R.C. openurl 
  Title Distraction as a function of within-task stimulation for hyperactive and normal children Type Journal Article
  Year 1978 Publication Journal of learning disabilities Abbreviated Journal J Learn Disabil  
  Volume 11 Issue 9 Pages 540-548  
  Keywords (up) *Attention; Child; Child, Preschool; Color Perception; Female; Humans; Hyperkinesis/*psychology; Male; Motor Skills; *Task Performance and Analysis; Visual Perception  
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  ISSN 0022-2194 ISBN Medium  
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  Notes PMID:731119 Approved no  
  Call Number refbase @ user @ Serial 270  
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Author Zentall, S.S.; Zentall, T.R. openurl 
  Title Activity and task performance of hyperactive children as a function of environmental stimulation Type Journal Article
  Year 1976 Publication Journal of consulting and clinical psychology Abbreviated Journal J Consult Clin Psychol  
  Volume 44 Issue 5 Pages 693-697  
  Keywords (up) Achievement; Acoustic Stimulation; *Arousal; Auditory Perception; Child; Humans; Hyperkinesis/*etiology; Photic Stimulation; Visual Perception  
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  Series Volume Series Issue Edition  
  ISSN 0022-006X ISBN Medium  
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  Notes PMID:965541 Approved no  
  Call Number refbase @ user @ Serial 272  
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