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Reaching Distance Influences Perceptual Decisions.

Eleonora E Assarioti1, Robert J van Beers1,2, Jeroen B J Smeets1

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Summary
This summary is machine-generated.

Action influences decisions. This study shows that physical effort, like reaching distance, biases choices in perceptual tasks, even when effort is explicit. This challenges existing embodied decision-making theories.

Keywords:
actiondecision makingembodied choicemotor costsperceptionrandom dot motion

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Decision Science

Background:

  • Embodied decision-making theories suggest actions influence perception.
  • Previous studies show implicit motor costs bias motion perception, but explicit costs do not.

Purpose of the Study:

  • To investigate if motor costs bias perceptual decisions beyond motion perception.
  • To determine if consciously experiencing motor costs prevents decision biases.

Main Methods:

  • A within-subjects design with 24 participants.
  • Participants performed motion and orientation discrimination tasks.
  • Motor costs were manipulated via varying reaching distances to response buttons.

Main Results:

  • A bias towards closer response options was observed in both tasks.
  • Explicit motor costs significantly impacted perceptual decisions.
  • The biasing effect generalized beyond motion discrimination.

Conclusions:

  • Explicit motor costs influence perceptual decisions, challenging prior assumptions.
  • The motor system is not just an effector but actively shapes decisions.
  • Action's role in decision-making is more profound than previously understood.