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  11. Hand Dominance Increases During Concurrent Bimanual Tracking: The Role Of Gaze Contingencies And Visual Display.
  1. Home
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  11. Hand Dominance Increases During Concurrent Bimanual Tracking: The Role Of Gaze Contingencies And Visual Display.

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Hand Dominance Increases During Concurrent Bimanual Tracking: The Role of Gaze Contingencies and Visual Display.

Adrien Coudiere1,2, Matthieu Morin1, Pierre-Michel Bernier3

  • 1CNRS-Université de Poitiers, France.

Human Factors
|July 17, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Right-handers naturally favor their dominant hand during dual-tasking visuomotor activities. However, fixating straight ahead significantly reduces this hand dominance, improving task performance equality.

Keywords:
dual taskingeye-hand coordinationgaze preferencehand dominance

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Area of Science:

  • Neuroscience
  • Human Factors
  • Motor Control

Background:

  • Operators often perform distinct tasks with each hand simultaneously.
  • Limited research exists on how dual-tasking affects the inherent right-hand visuomotor advantage in right-handed individuals.

Purpose of the Study:

  • To investigate the impact of dual-tasking on hand dominance during a bimanual visuomotor task.
  • To determine if the right-hand advantage persists, increases, or diminishes when performing concurrent tasks with both hands.

Main Methods:

  • Twenty-eight right-handed participants performed 2D visuomotor tracking under unimanual and bimanual conditions.
  • Tracking performance was assessed by measuring the mean cursor-target distance for each hand.
  • Gaze contingencies and visual displays were manipulated, including free gaze and head-straight fixation.
manual asymmetry
shared attention
visuomotor tracking

Main Results:

  • A significant right-hand advantage was observed in unimanual conditions.
  • In bimanual tasks with free gaze, performance decreased for both hands, with a greater deficit in the left hand, amplifying the right-hand advantage.
  • Fixating straight ahead substantially reduced manual asymmetry without compromising overall tracking performance.

Conclusions:

  • Right-handed individuals exhibit a natural prioritization of their dominant hand during bimanual visuomotor tasks.
  • Instructing participants to fixate straight ahead effectively mitigates this hand dominance.
  • Fixating straight ahead may be a beneficial strategy for operators, such as pilots, needing to divide tasks equally between hands.