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Interacting humans use forces in specific frequencies to exchange information by touch

Clémentine Colomer 1 Mukesh Dhamala 2 Gowrishankar Ganesh 3 Julien Lagarde 1 
3 IDH - Interactive Digital Humans
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : Object-mediated joint action is believed to be enabled by implicit information exchange between interacting individuals using subtle haptic signals within their interaction forces. The characteristics of these haptic signals have, however, remained unclear. Here we analyzed the interaction forces during an empirical dyadic interaction task using Granger–Geweke causality analysis, which allowed us to quantify the causal influence of each individual’s forces on their partner’s. We observed that the inter-partner influence was not the same at every frequency. Specifically, in the frequency band of [2.15–7] Hz, we observed inter-partner differences of causal influence that were invariant of the movement frequencies in the task and present only when information exchange was indispensable for task performance. Moreover, the inter-partner difference in this frequency band was observed to be correlated with the task performance by the dyad. Our results suggest that forces in the [2.15–7] Hz band constitute task related information exchange between individuals during physical interactions.
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https://hal.mines-ales.fr/hal-03817671
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Soumis le : lundi 17 octobre 2022 - 13:54:08
Dernière modification le : mercredi 19 octobre 2022 - 04:12:26

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s41598-022-19500-1.pdf
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Clémentine Colomer, Mukesh Dhamala, Gowrishankar Ganesh, Julien Lagarde. Interacting humans use forces in specific frequencies to exchange information by touch. Scientific Reports, 2022, 12, pp.15752. ⟨10.1038/s41598-022-19500-1⟩. ⟨hal-03817671⟩

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