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首页> 外文期刊>American journal of primatology >Manual laterality and strategy use for a coordinated bimanual task requiring precise and power grip in guenons and mangabeys
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Manual laterality and strategy use for a coordinated bimanual task requiring precise and power grip in guenons and mangabeys

机译：手动侧向和策略用途用于协调的双向任务，需要精确地握住牛和马甲

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Bimanual tasks have been repeatedly shown to elicit manual asymmetries supposed to reflect hemispheric specialization. And yet, a coordinated bimanual task, the BOX task, appears to be inefficient in detecting biases of hand preferences. The BOX task involves two sequential actions requiring a precise grip, lift the lid of a box and grasp a small item inside the box (while holding the lid). In the present study, we compared manual laterality exhibited for the classic bimanual BOX task and for a unimanual BOX task in 11 De Brazza's monkeys (Cercopithecus neglectus) and 19 red-capped mangabeys (Cercocebus torquatus). In addition, we assessed strategy use for solving the bimanual BOX task. We found that left-hand use for grasping the item was higher in the BOX-bimanual task than in the BOX-unimanual task. We propose that this increase in left-hand use for grasping the item results from both a hemispheric specialization for lifting the lid and an advantage in using a skillful strategy. Indeed, we revealed (1) group-level right biases for lifting the lid and (2) a complete differentiation between the roles of the two hands in subjects showing a left-hand preference for grasping the item. Finally, the bimanual BOX task showed age differences in the two species, either in manual laterality for grasping the item or in strategy use. This study provides additional evidence that manual laterality might be sensitive to maturational factors and characteristics of the bimanual tasks such as the order and the features of sequential actions.
机译：反复地显示了双向任务会引起手动不对称现象，该不对称现象可能反映了半球专业化。但是，协调的双向任务BOX任务似乎在检测手偏爱方面效率低下。 BOX任务涉及两个需要精确抓握的连续动作，抬起箱子的盖子并抓住箱子内的小物品（按住盖子）。在本研究中，我们比较了在11头De Brazza的猴子（Cercopithecus neglectus）和19顶红嘴man（Cercocebus torquatus）的经典双手BOX任务和单手BOX任务中显示的手动偏向性。此外，我们评估了解决双向BOX任务的策略使用。我们发现，在BOX双向任务中，左手用于抓取物品的比例高于在BOX手动任务中。我们建议，这种用于抓取物品的左手用途的增加既是由于半球抬起盖子的专业技术，又是使用熟练策略的优势。的确，我们发现（1）抬起盖子的组级别右偏见，以及（2）受试者的两只手的角色之间的完全区别，显示出对抓住物品的偏爱。最后，双手BOX任务显示了这两个物种的年龄差异，无论是在用于抓取物品的手动侧边还是在策略使用上。这项研究提供了额外的证据，即人工侧向性可能对成熟因素和双手任务的特征（例如顺序动作的顺序和特征）敏感。

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