Physically interacting individuals estimate the partner’s goal to enhance their movements

Atsushi Takagi (), Gowrishankar Ganesh, Toshinori Yoshioka, Mitsuo Kawato and Etienne Burdet ()
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Atsushi Takagi: Imperial College of Science, Technology and Medicine
Gowrishankar Ganesh: ATR Brain Information Communications research Laboratories
Toshinori Yoshioka: ATR Brain Information Communications research Laboratories
Mitsuo Kawato: ATR Brain Information Communications research Laboratories
Etienne Burdet: Imperial College of Science, Technology and Medicine

Nature Human Behaviour, 2017, vol. 1, issue 3, 1-6

Abstract: Abstract From a parent helping to guide their child during their first steps, to a therapist supporting a patient, physical assistance enabled by haptic interaction is a fundamental modus for improving motor abilities. However, what movement information is exchanged between partners during haptic interaction, and how this information is used to coordinate and assist others, remains unclear1. Here, we propose a model in which haptic information, provided by touch and proprioception2, enables interacting individuals to estimate the partner’s movement goal and use it to improve their own motor performance. We use an empirical physical interaction task3 to show that our model can explain human behaviours better than existing models of interaction in literature4–8. Furthermore, we experimentally verify our model by embodying it in a robot partner and checking that it induces the same improvements in motor performance and learning in a human individual as interacting with a human partner. These results promise collaborative robots that provide human-like assistance, and suggest that movement goal exchange is the key to physical assistance.

Date: 2017
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DOI: 10.1038/s41562-017-0054

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