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Titolo:
Effects of cognitive challenge on self-directed behaviors by chimpanzees (Pan troglodytes)
Autore:
Leavens, DA; Aureli, F; Hopkins, WD; Hyatt, CW;
Indirizzi:
Univ Georgia, Dept Psychol, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 rgia, Dept Psychol, Athens, GA 30602 USA Emory Univ, Yerkes Reg Primate Res Ctr, Living Links Ctr, Atlanta, GA USA Emory Univ Atlanta GA USA ate Res Ctr, Living Links Ctr, Atlanta, GA USA Liverpool John Moores Univ, Liverpool L3 5UX, Merseyside, England Liverpool John Moores Univ Liverpool Merseyside England L3 5UX e, England Berry Coll, Dept Psychol, Mt Berry, GA USA Berry Coll Mt Berry GA USABerry Coll, Dept Psychol, Mt Berry, GA USA Emory Univ, Yerkes Reg Primate Res Ctr, Div Psychobiol, Atlanta, GA USA Emory Univ Atlanta GA USA imate Res Ctr, Div Psychobiol, Atlanta, GA USA
Titolo Testata:
AMERICAN JOURNAL OF PRIMATOLOGY
fascicolo: 1, volume: 55, anno: 2001,
pagine: 1 - 14
SICI:
0275-2565(200109)55:1<1:EOCCOS>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISPLACEMENT ACTIVITIES; NONHUMAN-PRIMATES; RHESUS-MONKEYS; ANXIETY; LATERALITY; TASK; BABOONS;
Keywords:
cognitive stress; emotions; chimpanzees (Pan troglodytes); scratching; self-directed behaviors; displacement activities;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Leavens, DA Univ Sussex, Sch Cognit & Comp Sci, Psychol Grp, Brighton BN1 9QH, E Sussex, England Univ Sussex Brighton E Sussex England BN1 9QH Sussex, England
Citazione:
D.A. Leavens et al., "Effects of cognitive challenge on self-directed behaviors by chimpanzees (Pan troglodytes)", AM J PRIMAT, 55(1), 2001, pp. 1-14

Abstract

In primates, including humans, scratching and other self-directed behaviors (SDBs) have recently been reported to be differentially displayed as a function of social interactions, anxiety-related drugs, and response outcomesduring learning tasks. Yet few studies have focused on the factors influencing SDBs in our closest living relatives, the chimpanzees (Pan troglodytes). Furthermore, no previous experimental study has examined handedness of SDBs as a function of changes in task difficulty. Using matching-to-sample tasks of varying difficulty, the present study examines the effect of manipulations of task difficulty on rates, handedness, and type of SDBs in an experimental study of eight chimpanzees. SDBs were categorized as rubs, gentlescratches, and rough scratches. SDBs increased during difficult discriminations, but only for subjects who started the experiment on an easy discrimination; subjects who started on a difficult discrimination exhibited no differential rates of SDBs as a function of task difficulty. There was a tendency to exhibit relatively more SDBs with the right hand in the more difficult task. Rates of SDBs decreased after auditory feedback signals, suggesting a link between SDBs and uncertainty. Rubs were directed more to the face (trigeminal), and gentle and rough scratches more to the body (spinothalamic), suggesting that face-directed SDBs may index a different motivational basis than scratches. Taken together, these results extend previous researchon SDBs to the domain of cognitive stress in nonsocial contexts, demonstrating that SDBs are sensitive to manipulations of task difficulty in chimpanzees. Am. J. Primatol. 55:1-14, 2001. (C) 2001 Wiley-Liss, Inc.

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Documento generato il 25/01/20 alle ore 03:53:16