Biomechanical costs influence decisions made during ongoing actions

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.