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A Two-interval Forced-choice Task for Multisensory Comparisons
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Force sharing and other collaborative strategies in a dyadic force perception task.

Fabio Tatti1, Gabriel Baud-Bovy1,2,3

  • 1Robotics, Brain and Cognitive Sciences Department, Istituto Italiano di Tecnologia, Genoa, Italy.

Plos One
|February 24, 2018
PubMed
Summary
This summary is machine-generated.

When two people jointly control an object, they can struggle to identify external forces. However, they may develop strategies, like one person moving the object to communicate force direction to their partner.

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Area of Science:

  • Human-computer interaction
  • Biomechanics
  • Motor control

Background:

  • Joint physical tasks create ambiguity in force perception.
  • Understanding force attribution in collaborative manipulation is crucial.

Purpose of the Study:

  • Investigate how dyads perceive external forces applied to a jointly held object.
  • Examine coordination strategies for force direction identification.

Main Methods:

  • Dyads (two persons) identified the direction of a haptic device's force on a shared object.
  • Compared independent responses versus negotiated responses.

Main Results:

  • Force distribution between partners was often unequal, not optimizing joint performance.
  • An emergent strategy involved one partner moving the object to convey force information.
  • Negotiated responses showed participants with less force information switched responses more frequently.

Conclusions:

  • Dyads exhibit diverse coordination strategies for force perception.
  • Unexpected communication methods emerge in joint physical tasks.
  • Negotiation influences response strategies based on individual force information.