Matching object size by controlling finger span and hand shape.
Matching object size by controlling finger span and hand shape.
复制标题
通过控制手指跨度和手形来匹配物体大小。
DOI：
10.1080/08990229771060
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Soechting,JF
中科院分区：
文献类型：
--
作者：
Santello,M;Soechting,JF
研究了人类受试者精确控制手指跨度（拇指和一个手指之间的距离）的能力。实验中没有视觉反馈的手，并被设计为研究对象的大小，形状，距离，方向和手指配置的准确性的依赖。手指的组合和用于感知物体大小的感觉方式（视觉和触觉）的影响也进行了研究。受试者在这项任务中相当熟练;小错误往往主要是负面的，即，手指跨度对象大小。拇指-小指组合的准确性低于其他手指组合，无论使用的感觉方式。受试者在匹配圆柱体的大小时比匹配立方体和平行六面体时产生更大的低估错误。观察距离，物体方向和手指配置没有影响。匹配物体大小的准确性不依赖于所使用的感觉方式。还讨论了手指和拇指的个体自由度如何有助于控制手指跨度的问题。主成分分析表明，两个组成部分可以表征所使用的手的姿势，无论对象的大小。第一个主成分的振幅是恒定的，第二个主成分的振幅与物体大小成线性比例。这一发现表明，手的所有自由度都是作为一个单元来控制的。这一结果进行了讨论有关的“虚拟手指”的假设掌握。
The ability of human subjects to accurately control finger span (distance between thumb and one finger) was studied. The experiments were performed without visual feedback of the hand and were designed to study the dependence of accuracy on object size, shape, distance, orientation and finger configuration. The effects of finger combination and sensory modality used to perceive object size (vision and haptics) were also studied. Subjects were quite proficient at this task; the small errors tended to be predominantly negative, i.e., finger span object size. The thumb-little finger combination was less accurate than the other finger combinations, irrespective of the sensory modality used. Subjects made larger under-estimating errors when matching the size of cylinders than when matching cubes and parallelepipeds. No effect of viewing distance, object orientation and finger configuration was found. Accuracy in matching object size was not dependent on the sensory modality used. The question of how the individual degrees of freedom of the fingers and thumb contributed to the control of finger span was also addressed. Principal components analysis showed that two components could characterize the hand postures used, irrespective of object size. The amplitude of the first principal component was constant, and the amplitude of the second scaled linearly with object size. This finding suggests that all of the degrees of freedom of the hand are controlled as a unit. This result is discussed in relation to the 'virtual finger' hypothesis for grasping.
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DOI：
--
发表时间：
1981
期刊：
Attention and Performance
影响因子：
--
作者：
M. Jeannerod
通讯作者：
M. Jeannerod
影响因子：
2.5
作者：
SOECHTING, JF;FLANDERS, M
通讯作者：
FLANDERS, M
影响因子：
3.2
作者：
FLANDERS, M;SOECHTING, JF
通讯作者：
SOECHTING, JF
影响因子：
2.5
作者：
SCHIEBER, MH
通讯作者：
SCHIEBER, MH
影响因子：
13.9
作者：
Systems J F Soechting;M. Flanders
通讯作者：
Systems J F Soechting;M. Flanders