4.2 Article

Helping the waiter to hold his tray: Rigid haptic linkage promotes inter-personal motor coordination

期刊

QUARTERLY JOURNAL OF EXPERIMENTAL PSYCHOLOGY
卷 74, 期 10, 页码 1784-1790

出版社

SAGE PUBLICATIONS LTD
DOI: 10.1177/17470218211009082

关键词

Interpersonal coordination; sensorimotor; forward model; haptics; collaboration

资金

  1. European Research Council (ERC) under the European Union [819040]
  2. NOMIS foundation
  3. Humboldt Foundation
  4. European Research Council (ERC) [819040] Funding Source: European Research Council (ERC)

向作者/读者索取更多资源

The study examined the coordination between two people holding a tray when one of them or a third person removes the glass. The results showed exquisite coordination between the two, which is attributed to the haptic link provided by the rigid platform they are holding. It is suggested that guests should wait for the waiter's attention before lifting a drink from the tray, or assist in holding the tray if unable to wait due to thirst.
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 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.

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