PMID: 9419879Jan 7, 1998Paper

Chimpanzee (Pan troglodytes) pointing: hand shapes, accuracy, and the role of eye gaze

Journal of Comparative Psychology
M A Krause, R S Fouts

Abstract

The manual pointing of 2 signing chimpanzees, Moja and Tatu, was examined in 2 experiments. Experiment 1 investigated eye-gaze direction, hand use, and hand shape while pointing. Both chimpanzees obtained the attention of a human before pointing toward an unreachable object. During 100 trials, the chimpanzees alternated their eye gaze between the object and the human while pointing. Moja's points were left-hand biased, and Tatu showed no lateral hand bias. Both indexical and whole hand points were recorded. Experiment 2 tested the chimpanzees' ability to point accurately toward objects in close proximity to each other. Humans were able to reliably determine the locations toward which the chimpanzees pointed. Both chimpanzees showed left-hand biases, and a higher proportion of indexical points were observed than in Experiment 1. These results are compared and contrasted with recent hypotheses pertaining to the topography of chimpanzee pointing and the role of eye gaze in deictic interactions.

Citations

Dec 23, 1999·Journal of Comparative Psychology·D A Leavens, W D Hopkins
Mar 3, 2005·Animal Cognition·Jamie L RussellWilliam D Hopkins
Jul 11, 2006·Psychological Bulletin·William D Hopkins
Jun 9, 2009·Animal Cognition·David A LeavensWilliam D Hopkins
May 3, 2011·PloS One·Jared P TaglialatelaWilliam D Hopkins
Jun 17, 2010·The Behavioral and Brain Sciences·David A LeavensWilliam D Hopkins
Jun 23, 2010·American Journal of Primatology·James R AndersonKazuo Fujita
Aug 2, 2013·Child Development·Marloes H van der GootUlf Liszkowski
Jul 4, 2015·Animal Cognition·Marcus Perlman, Nathaniel Clark
Jun 4, 2019·Animals : an Open Access Journal From MDPI·Guillaume DezecacheAudrey Maille
Jun 27, 2019·Human Nature : an Interdisciplinary Biosocial Perspective·Anna Ilona RobertsSam George Bradley Roberts
Aug 25, 2020·American Journal of Primatology·Mark A Krause, Michael J Beran
Jan 24, 2007·Animal Cognition·James R AndersonKazuo Fujita
Nov 17, 2011·Animal Cognition·David A LeavensKim A Bard
Sep 8, 2012·Animal Cognition·Hélène MeunierJ Vauclair
Nov 18, 2014·Frontiers in Psychology·Kristen Gillespie-LynchSue Savage-Rumbaugh
Dec 25, 2012·Animal Cognition·Maureen S McCarthyDeborah H Fouts
Sep 4, 2013·Animal Cognition·Anna Ilona RobertsSarah-Jane Vick
Jan 30, 2015·Animal Cognition·Charlotte DefolieHélène Meunier
Dec 17, 2020·Animals : an Open Access Journal From MDPI·Gisela Kaplan

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