| Records |
Author  |
Zumpe, D.; Michael, R.P. |
| Title |
Dominance index: A simple measure of relative dominance status in primates |
Type |
Journal Article |
| Year |
1986 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
| Volume |
10 |
Issue |
4 |
Pages |
291-300 |
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| Abstract |
A simple measure of relative dominance status (cardinal rank) is described which we have termed the dominance index. Like more familiar techniques for assessing rank order, it is based on the direction of aggressive and submissive behaviors between all possible paired combinations of animals in a social group. Using data from five groups of female rhesus monkeys, it reliably produced the same ordinal ranks as fight interaction matrices. There was also good agreement with the cardinal ranks produced by two additional measures of dominance and with those produced by observer ratings. The dominance index can be calculated when fights have not actually occurred and is largely independent of the frequency of agonistic interactions. It has, therefore, wide application and can estimate dominance during brief sampling periods (one hour) and also in stable groups when agonistic interactions are low. Its application is described in experiments in which the male in a group of females was changed and the hormonal status of the females was altered. Estrogen increased female dominance status relative to other females. |
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| ISSN |
1098-2345 |
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no |
| Call Number |
refbase @ user @ DorisZumpe1986 |
Serial |
871 |
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| Author |
Zentall, T.R.; Jackson-Smith, P.; Jagielo, J.A.; Nallan, G.B. |
| Title |
Categorical shape and color coding by pigeons |
Type |
Journal Article |
| Year |
1986 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
| Volume |
12 |
Issue |
2 |
Pages |
153-159 |
| Keywords |
Animals; *Color Perception; Columbidae; *Discrimination Learning; *Form Perception; *Generalization, Stimulus; Psychophysics; Transfer (Psychology) |
| Abstract |
Categorical coding is the tendency to respond similarly to discriminated stimuli. Past research indicates that pigeons can categorize colors according to at least three spectral regions. Two present experiments assessed the categorical coding of shapes and the existence of a higher order color category (all colors). Pigeons were trained on two independent tasks (matching-to-sample, and oddity-from-sample). One task involved red and a plus sign, the other a circle and green. On test trials one of the two comparison stimuli from one task was replaced by one of the stimuli from the other task. Differential performance based on which of the two stimuli from the other task was introduced suggested categorical coding rules. In Experiment 1 evidence for the categorical coding of sample shapes was found. Categorical color coding was also found; however, it was the comparison stimuli rather than the samples that were categorically coded. Experiment 2 replicated the categorical shape sample effect and ruled out the possibility that the particular colors used were responsible for the categorical coding of comparison stimuli. Overall, the results indicate that pigeons can develop categorical rules involving shapes and colors and that the color categories can be hierarchical. |
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| ISSN |
0097-7403 |
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| Notes |
PMID:3701264 |
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no |
| Call Number |
refbase @ user @ |
Serial |
262 |
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| Author |
Zentall, S.S.; Zentall, T.R. |
| Title |
Hyperactivity ratings: statistical regression provides an insufficient explanation of practice effects |
Type |
Journal Article |
| Year |
1986 |
Publication |
Journal of pediatric psychology |
Abbreviated Journal |
J Pediatr Psychol |
| Volume |
11 |
Issue |
3 |
Pages |
393-396 |
| Keywords |
Attention Deficit Disorder with Hyperactivity/*diagnosis; Child; Humans; Male; *Practice (Psychology); *Statistics |
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0146-8693 |
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PMID:3772683 |
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no |
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refbase @ user @ |
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261 |
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| Author |
YALDEN DW et al, |
| Title |
Catalogue of the mammals of Ethiopia 6; II. order Perissodactyla; A |
Type |
Journal Article |
| Year |
1986 |
Publication |
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Abbreviated Journal |
Family Equidae Monitore Zool italiano Suppl |
| Volume |
21 |
Issue |
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Pages |
35-41 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1726 |
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| Author |
Wolfe Ml, |
| Title |
Population dynamics of feral horses in western North America |
Type |
Journal Article |
| Year |
1986 |
Publication |
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Abbreviated Journal |
J Equine Vet Sc |
| Volume |
6 |
Issue |
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Pages |
231-235 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1717 |
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| Author |
White Dj, |
| Title |
The american humane association: Position on wild horse management |
Type |
Journal Article |
| Year |
1986 |
Publication |
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Abbreviated Journal |
J Equine Vet Sc |
| Volume |
6 |
Issue |
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Pages |
276-277 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1706 |
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| Author |
Voith, V.L. |
| Title |
Principles of learning |
Type |
Journal Article |
| Year |
1986 |
Publication |
The Veterinary clinics of North America. Equine practice |
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2 |
Issue |
3 |
Pages |
485-506 |
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| Notes |
Cited By (since 1996): 9; Export Date: 21 October 2008 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4547 |
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| Author |
Vogt H, |
| Title |
Quagga eine Subspecies |
Type |
Journal Article |
| Year |
1986 |
Publication |
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Abbreviated Journal |
Naturwiss Rdsch |
| Volume |
39 |
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Pages |
H |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1681 |
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| Author |
Urcuioli, P.J.; Zentall, T.R. |
| Title |
Retrospective coding in pigeons' delayed matching-to-sample |
Type |
Journal Article |
| Year |
1986 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
| Volume |
12 |
Issue |
1 |
Pages |
69-77 |
| Keywords |
Animals; *Color Perception; Columbidae; *Discrimination Learning; *Form Perception; *Memory; *Mental Recall; Orientation; *Pattern Recognition, Visual; Retention (Psychology) |
| Abstract |
In this study we examined how coding processes in pigeons' delayed matching-to-sample were affected by the stimuli to be remembered. In Experiment 1, two groups of pigeons initially learned 0-delay matching-to-sample with identical comparison stimuli (vertical and horizontal lines) but with different sample stimuli (red and green hues or vertical and horizontal lines). Longer delays were then introduced between sample offset and comparison onset to assess whether pigeons were prospectively coding the same events (viz., the correct line comparisons) or retrospectively coding different events (viz., their respective sample stimuli). The hue-sample group matched more accurately and showed a slower rate of forgetting than the line-sample group. In Experiment 2, pigeons were trained with either hues or lines as both sample and comparison stimuli, or with hue samples and line comparisons or vice versa. Subsequent delay tests revealed that the hue-sample groups remembered more accurately and generally showed slower rates of forgetting than the line-sample groups. Comparison dimension had little or no effect on performance. Together, these data suggest that pigeons retrospectively code the samples in delayed matching-to-sample. |
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0097-7403 |
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| Notes |
PMID:3701260 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
263 |
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| Author |
Turner Jw, K.J. |
| Title |
Fertility control as a management tool for feral horse populations |
Type |
Journal Article |
| Year |
1986 |
Publication |
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Abbreviated Journal |
J Equine Vet Sc |
| Volume |
6 |
Issue |
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Pages |
278-284 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
| Call Number |
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Serial |
1669 |
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