Haptic discrimination in capuchin monkeys ( Cebus apella ): Evidence of manual specialization
Identifieur interne : 009621 ( Main/Merge ); précédent : 009620; suivant : 009622Haptic discrimination in capuchin monkeys ( Cebus apella ): Evidence of manual specialization
Auteurs : Lisa A. Parr [États-Unis] ; William D. Hopkins [États-Unis] ; Frans B. M De Waal [États-Unis]Source :
- Neuropsychologia [ 0028-3932 ] ; 1996.
Abstract
Two experiments investigated the effects of haptic and visual discrimination on hand preference in 22 brown capuchin monkeys (Cebus apella). The percentage of left-handed subjects in Experiment 1 were 63.6%, 45.5%, and 18.2% for haptic, bipedal, and quadrupedal reaching, respectively. In Experiment 2, the haptic demands of the task were manipulated by using additional food types and another tactile medium. Left-hand preferences were further strengthened when reaching into water compared to pine-shavings in Experiment 1. Reaching with no tactile interference resulted in equal numbers of lateralized and nonlateralized subjects. These results show that when reaching demands the use of haptic cues, as opposed to visual ones, monkeys shift towards greater left hand use. This is consistent with what is known about right hemisphere superiority for haptic discrimination in humans.
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DOI: 10.1016/S0028-3932(96)00056-5
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