Effect of object and human-factor characteristics on the preference of thumb-index finger grasp type.

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ID: 107961
2020
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Abstract
This work is to investigate the factors affecting the preference of human thumb-index finger grasping type. A multinomial logistic regression analysis shown that the object characteristics (equivalent diameter and shape) and human-factor characteristics (hand-used, finger-length sum and finger-length ratio) had significant contributions on the preference of thumb-index finger grasp type ( < 0.05) but the gender had not ( > 0.05). Subsequently, two mathematical equations were proposed for predicting the probability at which the precision-pinch and power-grasp were chosen for grasping an object. The probability at which the precision-pinch was chosen gradually decreased with the increase in the equivalent diameter of objects, but it is opposite for the power-grasp case. The shorter the finger-length sum, the more likely the participant was to select the power-grasp for grasping an object compared to the precision-pinch. The power-grasp was the most frequently chosen for the finger-length ratios of 1.0 ∼ 1.25 and 1.75 ∼ 2.0. This fruitful study gave explanation of the relationship between the object and human-factor characteristics and the preference of human thumb-index finger grasp type, which would be helpful to make intelligent grasping planning strategies for two-finger bionic mechanical hands.
Reference Key
chen2020effectergonomics Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Chen, Xiaojing;Li, Zhiguo;Wang, Yuqing;
Journal Ergonomics
Year 2020
DOI
10.1080/00140139.2020.1782997
URL
Keywords
grasping type human-factor characteristics object characteristics robotic hand thumb-index finger

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