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Effects of object characteristics on female grasp patterns
1Department of Occupational Therapy, Boston University, Sargent College of Allied Health professions, Massachusetts, USA.
Summary
Handle size significantly impacts how adult women grasp cups, influencing their motor performance. Adjusting handle size can optimize grip for individuals with limited hand use.
Area of Science:
- Ergonomics
- Human Factors Engineering
- Biomechanics
Background:
- Grasping objects is a fundamental motor skill.
- Object characteristics can influence grasp patterns and motor performance.
- Understanding these influences is crucial for designing accessible tools and environments.
Purpose of the Study:
- To determine the effect of object characteristics on grasp patterns in adult women drinking from cups.
- To investigate how handle size, cup height, and cup weight affect grasping behavior.
Main Methods:
- Thirty adult women (ages 20-45) participated in three experiments.
- Experiments manipulated handle size, cup height, and cup weight.
- Grasp patterns were recorded using videocamera observation.
Main Results:
- Larger handle sizes led to a significantly greater number of fingers through the handle.
- Cup height and weight did not significantly affect the number of supporting fingers used.
- Handle size was the primary determinant of grasp pattern variation.
Conclusions:
- Handle size is a key factor influencing grasp patterns when drinking from a cup.
- Adapting object characteristics, like handle size, can improve motor performance for individuals with hand limitations.
- This research supports modifying object design for enhanced user performance and accessibility.