| |
Records |
Links |
|
Author |
Caldwell, C.A.; Whiten, A. |
|
| |
Title |
Testing for social learning and imitation in common marmosets, Callithrix jacchus, using an artificial fruit |
Type |
Journal Article |
| |
Year |
2004 |
Publication |
Animal cognition |
Abbreviated Journal |
Anim. Cogn. |
|
| |
Volume |
7 |
Issue |
2 |
Pages |
77-85 |
|
| |
Keywords |
Animals; *Association Learning; Callithrix/*psychology; Discrimination Learning; *Feeding Behavior; Female; Food Preferences; Fruit; *Imitative Behavior; Male; *Social Behavior; Social Environment |
|
| |
Abstract  |
We tested for social learning and imitation in common marmosets using an artificial foraging task and trained conspecific demonstrators. We trained a demonstrator marmoset to open an artificial fruit, providing a full demonstration of the task to be learned. Another marmoset provided a partial demonstration, controlling for stimulus enhancement effects, by eating food from the outside of the apparatus. We thus compared three observer groups, each consisting of four animals: those that received the full demonstration, those that received the partial demonstration, and a control group that saw no demonstration prior to testing. Although none of the observer marmosets succeeded in opening the artificial fruit during the test periods, there were clear effects of demonstration type. Those that saw the full demonstration manipulated the apparatus more overall, whereas those from the control group manipulated it the least of the three groups. Those from the full-demonstration group also contacted the particular parts of the artificial fruit that they had seen touched (localised stimulus enhancement) to a greater extent than the other two groups. There was also an interaction between the number of hand and mouth touches made to the artificial fruit for the full- and partial-demonstration groups. Whether or not these data represent evidence for imitation is discussed. We also propose that the clear differences between the groups suggest that social learning mechanisms provide real benefits to these animals in terms of developing novel food-processing skills analogous to the one presented here. |
|
| |
Address |
Centre for Social Learning and Cognitive Evolution and Scottish Primate Research Group, University of St Andrews, KY16 9JU, St Andrews, Fife, Scotland. C.A.Caldwell@exeter.ac.uk |
|
| |
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 |
1435-9448 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
PMID:15069606 |
Approved |
no |
|
| |
Call Number |
refbase @ user @ |
Serial |
735 |
|
| Permanent link to this record |
| |
|
| |
|
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 |
Fischer, J.; Cheney, D.L.; Seyfarth, R.M. |
|
| |
Title |
Development of infant baboons' responses to graded bark variants |
Type |
Journal Article |
| |
Year |
2000 |
Publication |
Proceedings. Biological sciences / The Royal Society |
Abbreviated Journal |
Proc Biol Sci |
|
| |
Volume |
267 |
Issue |
1459 |
Pages |
2317-2321 |
|
| |
Keywords |
*Animal Communication; Animals; Behavior, Animal; Female; Male; Models, Psychological; Papio/growth & development/*physiology; *Vocalization, Animal |
|
| |
Abstract |
We studied the development of infant baboons' (Papio cynocephalus ursinus) responses to conspecific 'barks' in a free-ranging population in the Okavango Delta, Botswana. These barks grade from tonal, harmonically rich calls into calls with a more noisy, harsh structure. Typically, tonal variants are given when the signaller is at risk of losing contact with the group or a particular individual ('contact barks'), whereas harsh variants are given in response to predators ('alarm barks'). We conducted focal observations and playback experiments in which we presented variants of barks recorded from resident adult females. By six months of age, infants reliably discriminated between typical alarm and contact barks and they responded more strongly to intermediate alarm calls than to typical contact barks. Infants of six months and older also recognized their mothers by voice. The ability to discriminate between different call variants developed with increasing age. At two and a half months of age, infants failed to respond at all, whereas at four months they responded irrespective of the call type that was presented. At six months, infants showed adult-like responses by responding strongly to alarm barks but ignoring contact barks. We concluded that infants gradually learn to attach the appropriate meaning to alarm and contact barks. |
|
| |
Address |
Department of Psychology, University of Pennsylvania, 3815 Walnut Street, Philadelphia, PA 19104, USA. fischerj@eva.mpg.de |
|
| |
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 |
0962-8452 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
PMID:11413649 |
Approved |
no |
|
| |
Call Number |
refbase @ user @ |
Serial |
694 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
McGonigle, B.; Chalmers, M.; Dickinson, A. |
|
| |
Title |
Concurrent disjoint and reciprocal classification by Cebus apella in seriation tasks: evidence for hierarchical organization |
Type |
Journal Article |
| |
Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
|
| |
Volume |
6 |
Issue |
3 |
Pages |
185-197 |
|
| |
Keywords |
Animals; Cebus/*physiology; Discrimination Learning/*physiology; Female; Form Perception/*physiology; Male; *Task Performance and Analysis; Visual Perception/*physiology |
|
| |
Abstract |
We report the results of a 4-year-long study of capuchin monkeys ( Cebus apella ) on concurrent three-way classification and linear size seriation tasks using explicit ordering procedures, requiring subjects to select icons displayed on touch screens rather than manipulate and sort actual objects into groups. The results indicate that C. apella is competent to classify nine items concurrently, first into three disjoint classes where class exemplars are identical to one another, then into three reciprocal classes which share common exemplar (size) features. In the final phase we compare the relative efficiency of executive control under conditions where both hierarchical and/or linear organization can be utilized. Whilst this shows a superiority of categorical based size seriation for a nine item test set suggesting an adaptive advantage for hierarchical over linear organization, Cebus nevertheless achieved high levels of principled linear size seriation with sequence lengths not normally achieved by children below the age of six years. |
|
| |
Address |
Laboratory for Cognitive Neuroscience, Centre for Neuroscience, University of Edinburgh, Appleton Tower, George Square, Edinburgh EH 8 9QJ, UK. ejua48@holyrood.ed.ac.uk |
|
| |
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 |
1435-9448 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
PMID:12761655 |
Approved |
no |
|
| |
Call Number |
Equine Behaviour @ team @ |
Serial |
2568 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Pepperberg, I.M.; Brezinsky, M.V. |
|
| |
Title |
Acquisition of a relative class concept by an African gray parrot (Psittacus erithacus): discriminations based on relative size |
Type |
Journal Article |
| |
Year |
1991 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J Comp Psychol |
|
| |
Volume |
105 |
Issue |
3 |
Pages |
286-294 |
|
| |
Keywords |
Animals; Aptitude; *Concept Formation; *Discrimination Learning; Form Perception; Male; Mental Recall; *Parrots; *Size Perception; Vocalization, Animal |
|
| |
Abstract |
We report that an African gray parrot (Psittacus erithacus), Alex, responds to stimuli on a relative basis. Previous laboratory studies with artificial stimuli (such as pure tones) suggest that birds make relational responses as a secondary strategy, only after they have acquired information about the absolute values of the stimuli. Alex, however, after learning to respond to a small set of exemplars on the basis of relative size, transferred this behavior to novel situations that did not provide specific information about the absolute values of the stimuli. He responded to vocal questions about which was the larger or smaller exemplar by vocally labeling its color or material, and he responded “none” if the exemplars did not differ in size. His overall accuracy was 78.7%. |
|
| |
Address |
Northwestern University |
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
Washington, D.C. : 1983 |
Editor |
|
|
| |
Language |
English |
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
0735-7036 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
PMID:1935007 |
Approved |
yes |
|
| |
Call Number |
Equine Behaviour @ team @ |
Serial |
3610 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Reimers, M.; Schwarzenberger, F.; Preuschoft, S. |
|
| |
Title |
Rehabilitation of research chimpanzees: stress and coping after long-term isolation |
Type |
Journal Article |
| |
Year |
2007 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
Horm Behav |
|
| |
Volume |
51 |
Issue |
3 |
Pages |
428-435 |
|
| |
Keywords |
Adaptation, Psychological/*physiology; Animals; *Animals, Laboratory; Exploratory Behavior; Hydrocortisone/analysis/metabolism; Male; Models, Biological; *Pan troglodytes; Social Dominance; Social Environment; *Social Isolation/psychology; Stress/*rehabilitation/veterinary; Time |
|
| |
Abstract |
We report on the permanent retirement of chimpanzees from biomedical research and on resocialization after long-term social isolation. Our aim was to investigate to what extent behavioral and endocrine measures of stress in deprived laboratory chimpanzees can be improved by a more species-typical social life style. Personality in terms of novelty responses, social dominance after resocialization and hormonal stress susceptibility were affected by the onset of maternal separation of infant chimpanzees and duration of deprivation. Chimpanzees, who were separated from their mothers at a younger age and kept in isolation for more years appeared to be more timid personalities, less socially active, less dominant and more susceptible to stress, as compared to chimpanzees with a less severe deprivation history. However, permanent retirement from biomedical research in combination with therapeutic resocialization maximizing chimpanzees' situation control resulted in reduced fecal cortisol metabolite levels. Our results indicate that chimpanzees can recover from severe social deprivation, and may experience resocialization as less stressful than solitary housing. |
|
| |
Address |
Department of Natural Sciences, Institute of Biochemistry, University of Veterinary Medicine, Veterinarplatz 1, 1210 Vienna, Austria. reimers@wild-vet.at |
|
| |
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 |
0018-506X |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
PMID:17292368 |
Approved |
no |
|
| |
Call Number |
Equine Behaviour @ team @ |
Serial |
4188 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Shoshani, J.; Kupsky, W.J.; Marchant, G.H. |
|
| |
Title |
Elephant brain. Part I: gross morphology, functions, comparative anatomy, and evolution |
Type |
Journal Article |
| |
Year |
2006 |
Publication |
Brain Research Bulletin |
Abbreviated Journal |
Brain Res Bull |
|
| |
Volume |
70 |
Issue |
2 |
Pages |
124-157 |
|
| |
Keywords |
Animals; Brain/*anatomy & histology/blood supply/*physiology; Cats; Chinchilla; Elephants/*anatomy & histology/*physiology; Equidae; *Evolution; Female; Guinea Pigs; Haplorhini; Humans; Hyraxes; Male; Pan troglodytes; Sheep; Wolves |
|
| |
Abstract |
We report morphological data on brains of four African, Loxodonta africana, and three Asian elephants, Elephas maximus, and compare findings to literature. Brains exhibit a gyral pattern more complex and with more numerous gyri than in primates, humans included, and in carnivores, but less complex than in cetaceans. Cerebral frontal, parietal, temporal, limbic, and insular lobes are well developed, whereas the occipital lobe is relatively small. The insula is not as opercularized as in man. The temporal lobe is disproportionately large and expands laterally. Humans and elephants have three parallel temporal gyri: superior, middle, and inferior. Hippocampal sizes in elephants and humans are comparable, but proportionally smaller in elephant. A possible carotid rete was observed at the base of the brain. Brain size appears to be related to body size, ecology, sociality, and longevity. Elephant adult brain averages 4783 g, the largest among living and extinct terrestrial mammals; elephant neonate brain averages 50% of its adult brain weight (25% in humans). Cerebellar weight averages 18.6% of brain (1.8 times larger than in humans). During evolution, encephalization quotient has increased by 10-fold (0.2 for extinct Moeritherium, approximately 2.0 for extant elephants). We present 20 figures of the elephant brain, 16 of which contain new material. Similarities between human and elephant brains could be due to convergent evolution; both display mosaic characters and are highly derived mammals. Humans and elephants use and make tools and show a range of complex learning skills and behaviors. In elephants, the large amount of cerebral cortex, especially in the temporal lobe, and the well-developed olfactory system, structures associated with complex learning and behavioral functions in humans, may provide the substrate for such complex skills and behavior. |
|
| |
Address |
Department of Biology, University of Asmara, P.O. Box 1220, Asmara, Eritrea (Horn of Africa). hezy@bio.uoa.edu.er |
|
| |
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 |
0361-9230 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
PMID:16782503 |
Approved |
no |
|
| |
Call Number |
Equine Behaviour @ team @ |
Serial |
2623 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Tommasi, L.; Polli, C. |
|
| |
Title |
Representation of two geometric features of the environment in the domestic chick ( Gallus gallus) |
Type |
Journal Article |
| |
Year |
2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
|
| |
Volume |
7 |
Issue |
1 |
Pages |
53-59 |
|
| |
Keywords |
Animals; Chickens/*physiology; *Cues; Feeding Behavior/*physiology; Male; Pattern Recognition, Visual/*physiology |
|
| |
Abstract |
We report experiments based on a novel test in domestic chicks ( Gallus gallus), designed to examine the encoding of two different geometric features of an enclosed environment: relative lengths of the walls and amplitude of the corners. Chicks were trained to search for a food reward located in one corner of a parallelogram-shaped enclosure. Between trials, chicks were passively disoriented and the enclosure was rotated, making reorientation possible only on the basis of the internal spatial structure of the enclosure. In order to reorient, chicks could rely on two sources of information: the relative lengths of the walls of the enclosure (associated to their left-right sense order) and the angles subtended by walls at corners. Chicks learned the task choosing equally often the reinforced corner and its rotational equivalent. Results of tests carried out in novel enclosures, the shapes of which were chosen ad hoc (1) to induce reorientation based only on the ratio of walls lengths plus sense (rectangular enclosure), or (2) to induce reorientation based only on corner angles (rhombus-shaped enclosure), suggested that chicks encoded both features of the environment. In a third test, in which chicks faced a conflict between these geometric features (mirror parallelogram-shaped enclosure), reorientation seemed to depend on the salience of corner angles. These results shed light on the elements of the environmental geometry which control spatial reorientation, and broaden the knowledge on the geometric representation of space in animals. |
|
| |
Address |
Department of General Psychology, University of Padua, Via Venezia 8, 35131 Padua, Italy. ltommasi@unipd.it |
|
| |
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 |
1435-9448 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
PMID:12884079 |
Approved |
no |
|
| |
Call Number |
Equine Behaviour @ team @ |
Serial |
2561 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Russon, A.E.; Handayani, D.P.; Kuncoro, P.; Ferisa, A. |
|
| |
Title |
Orangutan leaf-carrying for nest-building: toward unraveling cultural processes |
Type |
Journal Article |
| |
Year |
2007 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
|
| |
Volume |
10 |
Issue |
2 |
Pages |
189-202 |
|
| |
Keywords |
Animals; Ecosystem; Female; Indonesia; Male; *Nesting Behavior; Pongo pygmaeus/*physiology; *Trees |
|
| |
Abstract |
We report an empirical study on leaf-carrying, a newly discovered nest-building technique that involves collecting nest materials before reaching the nest site. We assessed whether leaf-carrying by rehabilitant orangutans on Kaja Island, Central Kalimantan, owes to cultural influences. Findings derive from ca 600 h observational data on nesting skills and nesting associations in Kaja's 42 resident rehabilitants, which yielded 355 nests and 125 leaf-carrying cases by 34 rehabilitants. Regional contrasts with 14 other communities (7 rehabilitant, 7 wild) indicated cultural influences on leaf-carrying on Kaja. Association data showed exceptional social learning opportunities for leaf-carrying on Kaja, with residents taking differential advantage of these opportunities as a function of development, experience, and social position. Juvenile males with basic nesting skills were most influenced by social input. Most (27) leaf-carriers had probably learned leaf-carrying when caged and 7 probably learned it on Kaja. Social priming was probably the main impetus to leaf-carrying on Kaja, by simply prompting observers to copy when leaf-carrying associates collected nesting materials, what they collected, and where they used their collected materials. Implications concern acquisition processes and ontogenetic schedules that orchestrate sets of features-needs or interests, cognitive abilities, social preferences-which enable cultural transmission. |
|
| |
Address |
Department of Psychology, Glendon College of York University, 2275 Bayview Avenue, Toronto, ON, M4N 3M6, Canada. arusson@gl.yorku.ca |
|
| |
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 |
1435-9448 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
PMID:17160669 |
Approved |
no |
|
| |
Call Number |
Equine Behaviour @ team @ |
Serial |
2431 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Assersohn, C.; Whiten, A.; Kiwede, Z.T.; Tinka, J.; Karamagi, J. |
|
| |
Title |
Use of leaves to inspect ectoparasites in wild chimpanzees: a third cultural variant? |
Type |
Journal Article |
| |
Year |
2004 |
Publication |
Primates |
Abbreviated Journal |
Primates |
|
| |
Volume |
45 |
Issue |
4 |
Pages |
255-258 |
|
| |
Keywords |
Animals; Animals, Wild/physiology; Ape Diseases/*parasitology; Behavior, Animal/*physiology; Ectoparasitic Infestations/parasitology/*veterinary; Female; Grooming/*physiology; Male; Pan troglodytes/*physiology; *Plant Leaves; Protozoa/*isolation & purification; Uganda |
|
| |
Abstract |
We report 26 cases of using leaves as tools with which wild chimpanzees (Pan troglodytes schweinfurthii) in the Sonso community, Budongo Forest, Uganda, appeared to inspect objects removed during grooming. Careful removal of potential ectoparasites and delicate lip or manual placement on leaves followed by intense visual examination characterised this behaviour. It appears to be done to judge whether either ingestion or discarding is most appropriate, the former occurring in most cases. This behaviour may represent a third variant of ectoparasite handling, different from those described at Tai and Gombe, yet sharing features with the latter. These two East African techniques may thus have evolved from leaf grooming. |
|
| |
Address |
Scottish Primate Research Group, School of Psychology, University of St Andrews, St Andrews, KY16 9JU, Fife, UK |
|
| |
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 |
0032-8332 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
PMID:15179558 |
Approved |
no |
|
| |
Call Number |
refbase @ user @ |
Serial |
733 |
|
| Permanent link to this record |
