Wagman Jeffrey B, Carello Claudia
Department of Psychology, University of Connecticut, CT, USA.
J Exp Psychol Appl. 2003 Sep;9(3):175-86. doi: 10.1037/1076-898X.9.3.175.
Successful use of a hand-held tool requires overcoming the rotational inertia of the hand-plus-tool system. Where an object is grasped affects this rotational inertia. Appropriate choice of grip position may be crucial in the safe, effective, and efficient control of a hand-held tool. In 3 experiments, the authors investigated how choice of grip position on a tool was constrained by task demands. The results suggest that choice of grasp position serves to establish relationships among 3 variables derived from the inertial ellipsoid of the hand-object system (volume, symmetry, and eigenvector angle) in a way that specifically reflected the power or precision constraints of the given task. These variables have previously been shown to play a role in haptic perception of tool function. Changing grasp position on a tool is a way to exert control over the nuances of the user-tool interface.
成功使用手持工具需要克服手部与工具系统的转动惯量。握持物体的位置会影响这种转动惯量。在安全、有效且高效地控制手持工具方面，正确选择握持位置可能至关重要。在3项实验中，作者研究了工具握持位置的选择如何受到任务需求的限制。结果表明，握持位置的选择有助于以一种具体反映给定任务的力量或精度限制的方式，在从手部 - 物体系统的惯性椭球体得出的3个变量（体积、对称性和特征向量角）之间建立关系。这些变量此前已被证明在工具功能的触觉感知中发挥作用。改变工具上的握持位置是一种对用户 - 工具界面的细微差别进行控制的方式。
