Target animacy influences gorilla handedness

Forrester, G.S., Leavens, D.A., Quaresmini, C. and Vallortigara, G. 2011. Target animacy influences gorilla handedness. Animal Cognition. 14 (6), pp. 903-907.

TitleTarget animacy influences gorilla handedness
AuthorsForrester, G.S., Leavens, D.A., Quaresmini, C. and Vallortigara, G.
Abstract

We investigated the unimanual actions of a biological family group of twelve western lowland gorillas (Gorilla gorilla gorilla) using a methodological approach designed to assess behavior within social context from a bottom-up perspective. Measures of both the lateralization of unimanual actions (left, right) and the target of the action (animate, inanimate) were assessed during dual, synchronized video observations of naturalistic behavior. This paper demonstrates a corelationship between handedness and the animate quality of the target object. Analyses demonstrated a significant interaction between lateralized unimanual actions and target animacy and a right-hand bias for actions directed toward inanimate targets. We suggest that lateralized motor preference reflects the different processing capabilities of the left and right hemispheres, as influenced by the emotive (animate) and/or functional (inanimate) characteristics of the target, respectively.

JournalAnimal Cognition
Journal citation14 (6), pp. 903-907
ISSN1435-9448
YearNov 2011
PublisherSpringer
Digital Object Identifier (DOI)doi:10.1007/s10071-011-0413-6
Publication dates
PublishedNov 2011

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