In a Collaborative Co-manipulation, Humans Have a Motor Behaviour Similar to a Leader
Abstract
When two people physically interact to manipulate an object, they synchronize their actions to achieve a common goal.They can agree on a leader and a follower strategy, and cooperate, or combine their efforts without any fixed role agreement, in a collaboration.Previous studies found that interacting partners perform better than individuals and that they can coordinate their movements without explicit role directives, however, is it more effective to use cooperation or collaboration?Here, agents engaged in a collaboration, making fewer errors than when roles were fixed in a leader/follower format.Furthermore, high values of muscle co-contraction have been associated with leadership roles in the literature, but surprisingly, we observed that both human agents exhibit high values of co-contraction during collaboration.These results clarify the compromise between individual/mutual physical effort against common task execution accuracy that should be taken into account when designing or analyzing human dyadic interactions.
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