We tested the hand preferences of 20 chimpanzees (Pan troglodytes) for a haptic task requiring individuals to search for grapes in an opaque bucket filled with water. We compared these data to the hand preferences displayed by the same chimpanzees during reaching and bimanual feeding tasks. The chimpanzees displayed no significant hand preference for the reaching or bimanual feeding tasks, but exhibited a right-hand preference while performing the haptic task. In contrast, New and Old World monkeys display left-hand preferences for similar tasks. We discuss the relevance of these findings for the evolution of handedness in primates.
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Yerkes Natl Primate Res Ctr, Div Dev & Cognit Neurosci, Atlanta, GA USA
Georgia State Univ, Inst Neurosci, Atlanta, GA 30302 USA
Georgia State Univ, Language Res Ctr, Atlanta, GA 30302 USAYerkes Natl Primate Res Ctr, Div Dev & Cognit Neurosci, Atlanta, GA USA
Hopkins, William D.
Gardner, Molly
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Univ Texas MD Anderson Canc Ctr, Dept Vet Sci, Bastrop, TX USAYerkes Natl Primate Res Ctr, Div Dev & Cognit Neurosci, Atlanta, GA USA
Gardner, Molly
Mingle, Morgan
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Univ Texas MD Anderson Canc Ctr, Dept Vet Sci, Bastrop, TX USAYerkes Natl Primate Res Ctr, Div Dev & Cognit Neurosci, Atlanta, GA USA
Mingle, Morgan
Reamer, Lisa
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Univ Texas MD Anderson Canc Ctr, Dept Vet Sci, Bastrop, TX USAYerkes Natl Primate Res Ctr, Div Dev & Cognit Neurosci, Atlanta, GA USA
Reamer, Lisa
Schapiro, Steven J.
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Univ Texas MD Anderson Canc Ctr, Dept Vet Sci, Bastrop, TX USA
Univ Copenhagen, Dept Expt Med, Copenhagen, DenmarkYerkes Natl Primate Res Ctr, Div Dev & Cognit Neurosci, Atlanta, GA USA