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Biomechanical costs influence decisions made during ongoing actions.

Cesar Augusto Canaveral1, William Lata1, Andrea M Green1

  • 1Department of NeuroscienceUniversity of MontréalMontréalQuébecCanada.

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|July 11, 2024
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Human decisions during ongoing actions consider biomechanical costs when comparing similar tasks, challenging previous assumptions that these costs are disregarded during movement. This highlights the dynamic interplay between action choice and physical effort.

Keywords:
action selectionbiomechanicsdecision-makingmanual tracking

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Area of Science:

  • Neuroscience
  • Motor Control
  • Human-Computer Interaction

Background:

  • Accurate environmental interaction requires integrating spatial information and action costs/benefits.
  • Previous research indicated humans prefer lower biomechanical costs in "decide-then-act" scenarios.
  • Uncertainty exists regarding cost considerations in "decide-while-acting" scenarios during continuous movements.

Purpose of the Study:

  • To investigate whether biomechanical costs influence decisions made during ongoing actions.
  • To determine if cost considerations differ between continuous tracking and point-to-point movements.
  • To challenge the notion that biomechanical costs are disregarded in "decide-while-acting" situations.

Main Methods:

  • Participants decided between continuing straight-path tracking or switching to a deviating path.
  • Manipulated tracking direction, angular deviation rate, and side of deviation.
  • Compared scenarios where biomechanical costs favored continuing or switching paths, always between two continuous tracking actions.

Main Results:

  • Decisions during continuous tracking tasks consistently incorporated biomechanical costs.
  • Biomechanical cost considerations were evident when comparing similar continuous tracking actions.
  • Results contradict findings suggesting biomechanical costs are disregarded in "decide-while-acting" scenarios.

Conclusions:

  • Biomechanical factors are not disregarded during "decide-while-acting" scenarios.
  • Cost comparisons are influenced by the similarity of the actions being evaluated.
  • Findings advance understanding of biomechanics' role in dynamic action choices during environmental interaction.