Hand preferences in chimpanzees (Pan troglodytes), bonobos (Pan paniscus), and orangutans (Pongo pygmaeus) in food-reaching and other daily activities |
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Authors: | Montserrat Colell M Dolores Segarra Jordi Sabater Pi |
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Institution: | (1) Department of Psychiatry and Clinical Psychobiology, Faculty of Psychology, Barcelona University, Barcelona, Spain;(2) Departament de Psiquiatria i Psicobiologia clínica, Facultat de Psicologia, Passeig de la Vail d’Hebron, 171, 08035 Barcelona, Spain |
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Abstract: | We observed 36 captive great apes 31 chimpanzees (Pan troglodytes),2 bonobos (Pan paniscus), and3 orangutans (Pongo pygmaeus)]reaching for items of food and engaging in other spontaneous behaviors. We consider circumstantial factors that could influence
the preferred choice of one hand or the other. Most of the subjects (81%) showed a significant hand preference in food reaching
that is consistent in directionality with the hand preferences that they showed during other spontaneous behaviors. The results
show that the postural adjustment required when carrying out an action seems to influence directly the expression of manual
laterality in individuals. Moreover, the results indicate the possible existence of a relationship between maturational factors
and persistence in directionality of hand preferences. |
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Keywords: | hand preference handedness laterality Pan Pongo |
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