Hand morphometrics, electrodermal activity, and stone tools haptic perception
Hand morphometrics, electrodermal activity, and stone tools haptic perception
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DOI：
10.1002/ajhb.23370
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发表时间：
2019-12-13
影响因子：
2.9
通讯作者：
Bruner, Emiliano
中科院分区：
文献类型：
--
作者：
Fedato, Annapaola;Silva-Gago, Maria;Bruner, Emiliano
目的工具的使用需要将感觉、生物力学和认知因素整合在一起。考虑到工具使用在人类进化中的重要性，与人属相关的变化在所有这三个方面都是可以预期的。触觉是基于触觉和本体感觉的反馈，它与情感反应有关。此前的分析表明，在对不同类型的石器进行触觉探索时，男性和女性之间存在差异。在这里，我们分析了石器处理过程中的皮肤电反应与手部形态之间的相关性，以提供男性和女性可能共有的异速生长因素的证据。方法采用皮肤电分析技术，观察与这些反应有关的一些特殊参数，如注意水平和觉醒水平的变化。我们分析了46名惯用右手的成年人在蒙住眼睛时对20种不同的石器的反应。结果女性手较小，皮肤电反应范围较广。在男性和女性中，手的直径和一般的手的大小与电真皮水平和反应的程度无关。结论石器操作过程中电反应的性别差异不是由于手的大小或比例的影响。男性和女性之间的差异更好地解释为真正的性别差异，要么是由于生物的影响，要么是文化的影响。在工具探索过程中，手的大小并不影响唤醒或注意的程度，这表明其他因素会引发个体反应。这些结果增加了对手工具进化和工具感知的一般认知方法。
Objectives Tool use requires integration among sensorial, biomechanical, and cognitive factors. Taking into account the importance of tool use in human evolution, changes associated with the genus Homo are to be expected in all these three aspects. Haptics is based on both tactile and proprioceptive feedbacks, and it is associated with emotional reactions. Previous analyses have suggested a difference between males and females, and during haptic exploration of different typologies of stone tools. Here, we analyze the correlation between electrodermal reactions during stone tool handling and hand morphology to provide evidence of possible allometric factors shared by males and females. Methods Electrodermal analysis was used to investigate some specific parameters involved in these reactions, such as changes in the level of attention and arousal. We analyzed the responses of 46 right-handed adults to 20 distinct stone tools while blindfolded. Results Females have smaller hands and a wider range of electrodermal reactions. Within males and females, hand diameters and general hand size do not correlate with the degree of electrodermal level and response. Conclusions Sex differences in electrodemal reaction during stone tool handling are apparently not due to the effect of hand size or proportions. Differences between males and females are better interpreted as real sex differences, either due to a biological or cultural influences. Hand size does not influence the degree of arousal or attention during tool exploration, suggesting that other factors trigger individual reactions. These results add to a general cognitive approach on hand-tool evolution and tool sensing.