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Force asymmetry deteriorates complementary force production during joint action.
Junya Masumoto1, Nobuyuki Inui2
1Department of Sports, Health and Welfare, Faculty of Human Health, Hiroshima Bunka Gakuen University, 3-3-20 Heiseigahama, Saka-cho, Aki-gun, Hiroshima, 731-4312, Japan. jmasu@me.com.
Experimental Brain Research
|May 13, 2019
Summary
Force asymmetry between individuals negatively impacts joint force production. Greater force differences lead to increased errors and reduced performance in collaborative tasks.
Area of Science:
- Motor Control
- Human-Computer Interaction
- Biomechanics
Background:
- Interpersonal force production is crucial for coordinated physical tasks.
- Understanding how force discrepancies affect collaboration is essential for optimizing joint performance.
Purpose of the Study:
- To investigate the impact of force asymmetry on interpersonal force production.
- To quantify the relationship between force differences and collaborative task outcomes.
Main Methods:
- Participants performed individual and joint force production tasks.
- Joint tasks involved asymmetrical force conditions (1:1, 1:0.75, 1:0.5 ratios).
- Target forces were calculated based on individual maximum voluntary contractions (MVCs).
Main Results:
- Force production between pairs was negatively correlated, with higher correlation under the 1:1 condition.
- Absolute error was significantly smaller in the 1:1 condition compared to the 1:0.5 condition.
- Increased force asymmetry led to attenuated complementary force production and higher error rates.
Conclusions:
- Force asymmetry significantly deteriorates interpersonal force production and collaborative performance.
- Balanced force contributions are critical for effective joint task execution.
- Findings have implications for designing human-robot collaboration and understanding motor learning in dyads.
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