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Generalizing the optic flow equalization control law to an asymmetrical person-plus-object system.

Katie M Lucaites1, Rohith Venkatakrishnan2, Roshan Venkatakrishnan2

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Humans can adapt their steering control laws to account for asymmetrical tool use. This research shows people adjust optic flow equalization to navigate environments with unbalanced objects.

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Area of Science:

  • Human motor control
  • Perception-action systems
  • Robotics and automation

Background:

  • Visually guided action relies on control laws, where optical information guides interaction.
  • Standard optic flow equalization for steering assumes body symmetry, which is violated during tool use.
  • Asymmetrical tool use, like holding an object, creates non-lateral symmetry in person-plus-object systems.

Purpose of the Study:

  • To test a generalized control law for centered steering that accommodates asymmetries from tool use.
  • To investigate if humans can perceive and utilize system asymmetry for navigation.
  • To determine if asymmetrical tools can be integrated into perception-action systems for successful steering.

Main Methods:

  • Participants navigated a virtual hallway while holding an asymmetrical bar.
  • The speed of virtual walls was systematically altered during the experiment.
  • Control laws for centered steering were analyzed in relation to optic flow and perceived asymmetry.

Main Results:

  • Humans demonstrated perception of person-plus-object system asymmetry.
  • Participants modulated optic flow equalization control laws based on tool asymmetry.
  • Successful navigation was achieved by functionally incorporating the asymmetrical tool into the perception-action system.

Conclusions:

  • Human steering control is adaptable and can account for asymmetrical tool use.
  • Optic flow equalization is a flexible control law that can be modulated by perceived environmental and self-induced asymmetries.
  • This study advances understanding of perception-action integration in complex, asymmetrical scenarios.