Records |
Author |
Zeuner Fe, |
Title |
Das Pferd |
Type |
Journal Article |
Year |
1967 |
Publication |
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Abbreviated Journal |
In Zeuner; Geschichte der Haustiere |
Volume |
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Issue |
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Pages |
254-287 |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
Call Number |
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Serial |
1754 |
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Author |
Zeuner Fe, |
Title |
Der Halbesel |
Type |
Book Chapter |
Year |
1967 |
Publication |
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Abbreviated Journal |
In: Zeuner; Geschichte der Haustiere |
Volume |
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Issue |
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Pages |
311-316 |
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Conference |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
Call Number |
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Serial |
1755 |
Permanent link to this record |
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Author |
Zeuner Fe, |
Title |
Esel und Maultier |
Type |
Book Chapter |
Year |
1967 |
Publication |
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Abbreviated Journal |
In: Zeuner; Geschichte der Haustiere |
Volume |
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Issue |
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Pages |
316-324 |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
Call Number |
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Serial |
1756 |
Permanent link to this record |
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Author |
Zervanos Sm, K.R. |
Title |
Seasonal home ranges and activity patterns of feral assateague island ponies |
Type |
Conference Volume |
Year |
1979 |
Publication |
Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
Abbreviated Journal |
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Volume |
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Issue |
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Pages |
3-14 |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
Call Number |
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Serial |
1753 |
Permanent link to this record |
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Author |
Zenzinger, S. |
Title |
Experimentelle Untersuchungen zur optischen Kommunikation bei im Zoo gehaltenen Schabracken- und Flachlandtapiren (Tapirus indicus und Tapirus terrestris) |
Type |
Journal Article |
Year |
2010 |
Publication |
Der Zoologische Garten |
Abbreviated Journal |
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Volume |
79 |
Issue |
4-5 |
Pages |
162-174 |
Keywords |
Tapirus indicus; Tapirus terrestris; communication; optical stimuli; posters; white ear rims; key stimulus |
Abstract |
Until now, unlike their relatives, rhinos and horses tapirs have received considerably less attention in studies about communication. Therefore, it was the aim of this study to test which stimuli contain optical information for tapirs. For this purpose, the reactions of tapirs on optical stimuli (posters with edited tapir silhouettes) were examined. Research visits took place at the zoos of Berlin, Dortmund, Heidelberg, Munich, Nuremberg and Osnabrück during the year 2006. A total of 23 individuals, thereof 8 (5.3) Malayan tapirs (Tapirus indicus) and 15 (5.10) Lowland tapirs (Tapirus terrestris) attended the experiment. The results of the optical test with variously intense edited tapir silhouettes speak for the importance of the white ear rims as a family specific key stimulus. But that effect could not be amplified by adding a greater extent of white to the silhouette. Tapirs of both species reacted most strongly to the normal tapir silhouette followed by a silhouette without proboscis. |
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Edition |
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ISSN |
0044-5169 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
5321 |
Permanent link to this record |
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Author |
Zentall, T.R; Hogan, D.E. |
Title |
Key pecking in pigeons produced by pairing keylight with inaccessible grain |
Type |
Journal Article |
Year |
1975 |
Publication |
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Abbreviated Journal |
J Exp Anal Behav |
Volume |
23 |
Issue |
2 |
Pages |
199-206 |
Keywords |
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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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Language |
English |
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Series Editor |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0022-5002 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:16811840 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
273 |
Permanent link to this record |
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Author |
Zentall, T.R.; Hogan, D.E.. |
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 |
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Abbreviated Journal |
J Exp Anal Behav |
Volume |
30 |
Issue |
2 |
Pages |
177-186 |
Keywords |
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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. |
Address |
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English |
Summary Language |
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Edition |
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ISSN |
0022-5002 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:16812097 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
271 |
Permanent link to this record |
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Author |
Zentall, T.R.; Weaver, J.E.; Clement, T.S. |
Title |
Pigeons group time intervals according to their relative duration |
Type |
Journal Article |
Year |
2004 |
Publication |
Psychonomic bulletin & review |
Abbreviated Journal |
Psychon Bull Rev |
Volume |
11 |
Issue |
1 |
Pages |
113-117 |
Keywords |
Animals; Columbidae; *Discrimination (Psychology); Reinforcement (Psychology); Time Factors; Time Perception |
Abstract |
In the present research, we asked whether pigeons tended to judge time intervals not only in terms of their absolute value but also relative to a duration from which they must be discriminated (i.e., longer or shorter). Pigeons were trained on two independent temporal discriminations. In one discrimination, sample durations of 2 and 8 sec were associated with, for example, red and green hue comparisons, respectively, and in the other discrimination, sample durations of 4 and 16 sec were associated with vertical and horizontal line comparisons, respectively. If pigeons are trained on a temporal discrimination and tested with intermediate durations, the subjective midpoint typically occurs close to the geometric mean of the two trained values. The 4- and 8-sec values were selected to be the geometric mean of the two values in the other discrimination. When a 4-sec test sample was presented with the comparisons from the 2- and 8-sec discrimination, the pigeons preferred the comparison associated with the shorter sample. Similarly, when an 8-sec test sample was presented with the comparisons from the 4- and 16-sec discrimination, the pigeons preferred the comparison associated with the longer sample. Thus, a relative grouping effect was found. That is, durations that should have produced indifferent choice were influenced by their relative durations (shorter than or longer than the alternative) during training. |
Address |
Department of Psychology, University of Kentucky, Lexington, Kentucky 40506-0044, USA. zentall@pop.uky.edu |
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English |
Summary Language |
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Series Editor |
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Edition |
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ISSN |
1069-9384 |
ISBN |
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Notes |
PMID:15116995 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
231 |
Permanent link to this record |
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Author |
Zentall, T.R.; Sutton, J.E.; Sherburne, L.M. |
Title |
True imitative learning in pigeons |
Type |
Journal Article |
Year |
1996 |
Publication |
Psychol Sci |
Abbreviated Journal |
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Volume |
7 |
Issue |
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Pages |
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no |
Call Number |
Equine Behaviour @ team @ Zentall1996 |
Serial |
6372 |
Permanent link to this record |
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Author |
Zentall, T.R.; Sherburne, L.M.; Roper, K.L.; Kraemer, P.J. |
Title |
Value transfer in a simultaneous discrimination appears to result from within-event pavlovian conditioning |
Type |
Journal Article |
Year |
1996 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
Volume |
22 |
Issue |
1 |
Pages |
68-75 |
Keywords |
Animals; Behavior, Animal; Columbidae; *Conditioning, Classical; *Discrimination Learning; Female; Male; *Reinforcement (Psychology) |
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-. |
Address |
Department of Psychology, University of Kentucky Lexington 40506, USA |
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English |
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Series Editor |
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Edition |
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ISSN |
0097-7403 |
ISBN |
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Notes |
PMID:8568497 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
255 |
Permanent link to this record |