ZEOC.htm

NR ZEOC

AU Desire,L.; Veissier,I.; Despres,G.; Delval,E.; Toporenko,G.; Boissy,A.

TI Appraisal process in sheep (Ovis aries): interactive effect of suddenness and unfamiliarity on cardiac and behavioral responses.

QU Journal of Comparative Psychology 2006 Aug; 120(3): 280-7

PT journal article

AB Appraisal theories state that an emotion results from an individual's evaluation of a stimulating event, which is based on a set of criteria. Each criterion triggers specific expressions that can be modulated by the outcome of other criteria. The authors analyzed the effects of the criteria of suddenness, unfamiliarity, and their combination on behavioral and cardiac responses in lambs (Ovis aries). Lambs were exposed to a visual stimulus that appeared either rapidly or slowly and was either unfamiliar or familiar. Suddenness induced a startle response and an increase in heart rate. Unfamiliarity induced an orientation response. The combination of suddenness and unfamiliarity enhanced both the heart rate increase and the behavioral orientation response. These results support the hypotheses of specificity and modulation of emotional expressions.

AD Unite de Recherches sur les Herbivores, Institut National de la Recherche Agronomique-Clermont-Ferrand Theix, F-63122 Saint-Genes-Champanelle, France.

SP englisch

PO USA

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