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Objects feel stiffer in the nondominant hand when comparing between hands.

Shani Arusi1, Raz Leib2, Ilana Nisky1

  • 1Department of Biomedical Engineering, Ben Gurion University of the Negev, Be'er-Sheva, Israel.

Journal of Neurophysiology
|March 17, 2026
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Summary

Stiffness perception differs when using different hands. Objects explored by the nondominant hand feel stiffer than those explored by the dominant hand, impacting manual interaction understanding.

Keywords:
handednessstiffness perception

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Area of Science:

  • Human-computer interaction
  • Neuroscience
  • Psychophysics

Background:

  • Stiffness perception is crucial for object interaction, like assessing fruit ripeness.
  • Previous research focused on single-hand (unimanual) object interaction.
  • Limited understanding exists regarding stiffness perception across different hand interactions.

Purpose of the Study:

  • To investigate stiffness perception when interacting with virtual elastic objects using different hands.
  • To compare stiffness judgments made with the same hand versus different hands.

Main Methods:

  • Participants compared stiffness of virtual objects probed sequentially.
  • Two conditions were tested: both objects probed with the same hand, or each object probed with a different hand.
  • Participants reported which object felt stiffer.

Main Results:

  • Reliable stiffness discrimination occurred when using the same hand.
  • When using different hands, objects probed by the nondominant hand were perceived as stiffer.
  • Right-handed individuals found objects touched by the left hand stiffer, and vice-versa for left-handed individuals.

Conclusions:

  • Hand dominance significantly influences stiffness perception.
  • This finding advances the understanding of somatosensory perception in manual interactions.
  • Results have implications for designing bimanual interfaces in virtual reality, teleoperation, and simulation.