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Humans underestimate the movement range of their own hands.
Artur Pilacinski1, Antoine Vandenberghe2,3, Gabriella Andrietta4
1Medical Faculty, Ruhr University Bochum, Bochum, Germany. art.pilacinski@gmail.com.
Communications Psychology
|November 2, 2024
Summary
People underestimate their hand
Area of Science:
- Neuroscience
- Biomechanics
- Motor Control
Background:
- Motor planning and imagery rely on internal biomechanical representations.
- Accurate limb property understanding is crucial for effective movement.
Purpose of the Study:
- To investigate the accuracy of internal representations of hand motion range.
- To determine if people accurately estimate their own hand's range of motion.
Main Methods:
- Two tasks were employed: motion range estimation and motor imagery.
- Participants judged their rotational hand movement ranges in cardinal directions.
Main Results:
- Judgments of hand motion range were underestimated in three out of four cardinal directions.
- This underestimation occurred in both estimation and imagery tasks.
Conclusions:
- Internal representations of hand motion range are biased, not veridical.
- This bias may optimize the balance between movement efficiency and safety.
- The stochastic nature of movement execution likely influences this representational bias.
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