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EXPRESS: Helping the waiter to hold his tray: rigid haptic linkage promotes inter-personal motor coordination
Quarterly Journal of Experimental Psychology ( IF 1.7 ) Pub Date : 2021-03-25 , DOI: 10.1177/17470218211009082
Dardo N Ferreiro 1, 2 , Chris D Frith 3, 4 , Bahador Bahrami 1, 5, 6
Affiliation  

When a glass is lifted from a tray, there is a challenge for the waiter. He must quickly compensate for the reduction in the weight of the tray in order to keep it balanced. This compensation is easily achieved if the waiter lifts the glass himself. Because he has, himself, initiated the action, he can predict the timing and the magnitude of the perturbation of the tray and respond (via the holding hand) accordingly. In this study we examined coordination when either one or two people hold the tray while either one of them or a third person removes the glass. Our results show that there is exquisite coordination between the two people holding the tray. We suggest that this coordination depends upon the haptic link provided by the rigid platform that both people are holding. We conclude that the guest at a reception should not lift his drink from the waiter’s tray until they have the waiter’s attention but, if too thirsty to wait, should lend a hand holding the tray.



中文翻译:

EXPRESS:帮助服务员端起托盘:刚性触觉联动促进人际运动协调

当从托盘上取下玻璃杯时,对服务员来说是一个挑战。他必须迅速补偿托盘重量的减少,以保持其平衡。如果服务员自己举起杯子,这种补偿很容易实现。因为他自己发起了动作,所以他可以预测托盘扰动的时间和幅度,并相应地做出反应(通过握住的手)。在这项研究中,我们检查了当一个人或两个人拿着托盘而其中一个人或第三个人取下玻璃杯时的协调性。我们的结果表明,拿着托盘的两个人之间存在着微妙的协调。我们建议这种协调取决于两个人都拿着的刚性平台提供的触觉链接。

更新日期:2021-03-25
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