Abstract
AbstractThe developmental process of nut-cracking skill in the wild chimpanzee community of Bossou was reviewed from the perspective of object manipulation. The infant chimpanzees required more than 3.5 years to acquire the skill of cracking nuts using stone tools. During development, infants showed more complex manipulation: from a single action on a single object to successive or simultaneous actions on multiple objects. Although the basic action patterns were already observed at the age of 1.5 years, it was difficult for these infants to perform the actions in an appropriate sequence to achieve the goal of cracking nuts. The long-term changes of manipulative behavior after first success are summarized and discussed in relationship to cognitive development in chimpanzees.KeywordsCapuchin MonkeyObject ManipulationWild ChimpanzeeHuman ChildPhysical CausalityThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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