| Records |
| Author |
Clark, M.L.; Ayers, M. |
| Title |
Friendship similarity during early adolescence: gender and racial patterns |
Type |
Journal Article |
| Year |
1992 |
Publication  |
The Journal of Psychology |
Abbreviated Journal |
J Psychol |
| Volume |
126 |
Issue |
4 |
Pages |
393-405 |
| Keywords |
Achievement; Adolescent; African Americans/*psychology; *Cross-Cultural Comparison; Female; *Gender Identity; Humans; Individuality; *Interpersonal Relations; Male; *Personality Development; Personality Inventory; Sociometric Techniques |
| Abstract |
We studied the relationship of reciprocity, gender, and racial composition (Caucasian, African American, cross-race) of adolescent friendship dyads to similarity and proximity in 136 young adolescents. We found that adolescents selected friends who were of the same gender and race and that female dyads were more similar than male dyads on verbal achievement and several personality dimensions. Caucasian dyads were more similar than African American dyads on verbal achievement, mental alertness, and dominance. African American adolescents had more contact with their best friends outside school, whereas Caucasian adolescent friends had more in-school contact. African American students had fewer reciprocal relationships than the Caucasian students. Cross-race friendships were less reciprocal than same-race friendships. Race and gender were important in determining friendship patterns. Similarity and proximity were more important than reciprocity in understanding early adolescent friendships. |
| Address |
Department of Psychology, Virginia Commonwealth University |
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
English |
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0022-3980 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
PMID:1403972 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5628 |
| Permanent link to this record |
| |
|
| |
| Author |
Dugatkin, L.A.; Mesterton-Gibbons, M.; Houston, A.I. |
| Title |
Beyond the prisoner's dilemma: Toward models to discriminate among mechanisms of cooperation in nature |
Type |
Journal Article |
| Year |
1992 |
Publication |
Trends Evol. Ecol. |
Abbreviated Journal |
|
| Volume |
7 |
Issue |
|
Pages |
202-205 |
| Keywords |
|
| Abstract |
The iterated prisoner's dilemma game, or IPD, has now established itself as the orthodox paradigm for theoretical investigations of the evolution of cooperation; but its scope is restricted to reciprocity, which is only one of three categories of cooperation among unrelated individuals. Even within that category, a cooperative encounter has in general three phases, and the IPD has nothing to say about two of them. To distinguish among mechanisms of cooperation in nature, future theoretical work on the evolution of cooperation must distance itself from economics and develop games as a refinement of ethology's comparative approach. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
10.1016/0169-5347(92)90074-L |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4843 |
| Permanent link to this record |
| |
|
| |
| Author |
Timney, B.; Keil, K. |
| Title |
Visual acuity in the horse |
Type |
Journal Article |
| Year |
1992 |
Publication |
Vision Research |
Abbreviated Journal |
Vis. Res. |
| Volume |
32 |
Issue |
12 |
Pages |
2289-2293 |
| Keywords |
Horse Visual acuity Visual discrimination |
| Abstract |
We assessed the ease with which horses could learn visual discriminations and measured their resolution acuity. We trained three horses to press their noses against one of two large wooden panels to receive a small food reward. Following training on a series of two-choice discrimination tasks, resolution acuity was measured. Although there was some variability between animals, the best acuity obtained was 23.3 c deg-1. Within the margin of error imposed by limited anatomical data, the obtained values are consistent with predictions based on retinal ganglion cell density estimates and posterior nodal distance/axial length ratios. They suggest that the resolution acuity of the horse is limited by ganglion cell density in the temporal portion of the narrow visual streak. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
851 |
| Permanent link to this record |
| |
|
| |
| Author |
Eisgruber, H.; Stolle, F.A. |
| Title |
[Clostridia in carcasses and fresh meat--a literature review] |
Type |
Journal Article |
| Year |
1992 |
Publication |
Zentralblatt fur Veterinarmedizin. Reihe B. Journal of Veterinary Medicine. Series B |
Abbreviated Journal |
Zentralbl Veterinarmed B |
| Volume |
39 |
Issue |
10 |
Pages |
746-754 |
| Keywords |
Abattoirs; Animals; Cattle; Clostridium/*growth & development; *Food Microbiology; Horses; Meat/*microbiology; Muscles/*microbiology; Sheep; Swine |
| Abstract |
Clostridia are of large clinical importance as well as in the field of food hygiene, where they are responsible for spoilage but they also have a certain significance as food poisoning organisms. Information on the ecology of Clostridia in samples of deep muscle tissue of slaughtered animals is insufficient. This article is intended to increase the knowledge on the occurrence of different Clostridia species in slaughtered animals. The main emphasis is put on the significance of clostridia in meat hygiene. The theoretical basis of the so called original content of microorganisms (intrinsic bacteria), the factors and pathways of Clostridia spreading in muscles and organs are demonstrated. |
| Address |
Institut fur Hygiene und Technologie, Ludwig-Maximilians-Universitat Munchen |
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
German |
Summary Language |
|
Original Title |
Clostridien in Schlachttierkorpern und frischem Fleisch--Eine Literaturubersicht |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0514-7166 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
PMID:1492516 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2668 |
| Permanent link to this record |
