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Sensorimotor faculties bias choice behavior.

Jan Kubanek1, Lawrence H Snyder2, Richard A Abrams3

  • 1Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, United States.

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|April 14, 2025
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Summary
This summary is machine-generated.

Handedness influences free choices, with left-handers preferring leftward actions and right-handers preferring rightward actions. Auditory perception also impacts decisions, revealing biases in how we process sensory information.

Keywords:
auditory systemembodied cognitionfree choicehand dominanceperceptual decision-makingright ear advantage

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Area of Science:

  • Cognitive Neuroscience
  • Embodied Cognition
  • Psychology

Background:

  • Higher-order cognitive processes, like decision-making, are traditionally viewed as independent of motor and sensory systems.
  • Embodied cognition research suggests that physical attributes and bodily states can unexpectedly influence cognitive functions.

Purpose of the Study:

  • To investigate the influence of handedness and auditory system asymmetries on human decision-making.
  • To determine if motor biases (handedness) and sensory biases (auditory perception) affect choice behavior.

Main Methods:

  • Participants (right- and left-handed) performed an auditory decision task, judging the location of click sounds.
  • Response choices were made using either the left or right index finger.
  • Trials included both stimulus-driven choices and free choices without auditory cues.

Main Results:

  • In free-choice scenarios, handedness significantly predicted choice direction: left-handers showed a leftward bias, and right-handers showed a rightward bias.
  • In stimulus-driven choices, a bias towards perceiving more clicks in the right ear was observed, modulated by response-stimulus congruence.
  • The findings indicate that both motor (handedness) and sensory (auditory) system properties shape decision-making.

Conclusions:

  • Human choices are not solely based on rational deliberation but are demonstrably influenced by inherent motor and sensory system characteristics.
  • Handedness acts as a significant bias in free choice selection.
  • Auditory perception exhibits biases that can be revealed through decision tasks, highlighting the integration of sensory input into choice mechanisms.