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Complex Tasks Force Hand Laterality and Technological Behaviour in Naturalistically Housed Chimpanzees: Inferences in Hominin Evolution

机译:复杂的任务在自然饲养的黑猩猩中迫使手的侧向性和技术行为:Hominin进化的推论。

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摘要

Clear hand laterality patterns in humans are widely accepted. However, humans only elicit a significant hand laterality pattern when performing complementary role differentiation (CRD) tasks. Meanwhile, hand laterality in chimpanzees is weaker and controversial. Here we have reevaluated our results on hand laterality in chimpanzees housed in naturalistic environments at Fundació Mona (Spain) and Chimfunshi Wild Orphanage (Zambia). Our results show that the difference between hand laterality in humans and chimpanzees is not as great as once thought. Furthermore, we found a link between hand laterality and task complexity and also an even more interesting connection: CRD tasks elicited not only the hand laterality but also the use of tools. This paper aims to turn attention to the importance of this threefold connection in human evolution: the link between CRD tasks, hand laterality, and tool use, which has important evolutionary implications that may explain the development of complex behaviour in early hominins.
机译:人类清楚的手侧向分布模式已被广泛接受。但是,人类在执行互补角色区分(CRD)任务时仅会引起明显的手侧卧模式。同时,黑猩猩的手侧向性较弱且存在争议。在这里,我们重新评估了在FundacióMona(西班牙)和Chimfunshi野生孤儿院(赞比亚)自然环境中生活的黑猩猩手侧偏的结果。我们的研究结果表明,人类和黑猩猩的手侧向度之间的差异并不像以前想象的那么大。此外,我们发现了手侧向性和任务复杂性之间的联系,还有一个更有趣的联系:CRD任务不仅引发了手侧向性,而且引发了工具的使用。本文旨在使人们关注这种三重联系在人类进化中的重要性:CRD任务,手侧向性和工具使用之间的联系,这具有重要的进化含义,可以解释早期人类的复杂行为的发展。

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