Effects of surface texture and grip force on the discrimination of hand-held loads
Effects of surface texture and grip force on the discrimination of hand-held loads
复制标题
DOI：
10.3758/bf03206853
复制
发表时间：
1997-01-01
期刊：
影响因子：
--
通讯作者：
Wing, AM
中科院分区：
文献类型：
--
作者：
Flanagan, JR;Wing, AM
在本文中，我们报告了两个实验的结果，在这些实验中，受试者被要求区分应用于精确握把的操纵臂的水平载荷力。操纵握把表面的粗糙度（以及摩擦）和所需的握把力。在第一个实验中，受试者被要求在保持手的位置和不让操纵杆滑动的情况下判断负载。结果表明，表面织构对其性能有较大影响；当表面纹理光滑时，给定的载荷比表面纹理粗糙时更大。这一结果与先前基于起重物体的研究一致，表明表面纹理的影响适用于一般负载，而不仅仅是重力负载（即重量）。为了测试是否判断作用在光滑物体上的载荷更大，因为防止其滑动所需的握力更大，进行了第二次实验。受试者使用视觉反馈显示来保持对光滑和粗糙操纵面相同的握力。在这种情况下，表面纹理对负载感知没有影响。这些结果提供的证据表明，感知负载取决于用于抵抗负载的握力。这些结果的含义在中心和外围因素方面的负荷歧视被考虑。
In this paper, we report the results from two experiments in which subjects were required to dis criminate horizontal load forces applied to a manipulandum held with a precision grip. The roughness (and hence friction) of the grip surfaces and required grip force were manipulated. In the first experiment, subjects were instructed to judge the load while maintaining hand position and not letting the manipulandum slip. It was found that performance was influenced by surface texture; a given load was judged to be greater when the surface texture was smooth than when it was rough. This result is consistent with a previous study based on lifting objects and indicates that the effect of surface texture applies to loads in general and not just to gravitational loads (i.e., weight). To test whether the load acting on a smooth object is judged to be greater because the grip force required to prevent it from slipping is larger, a second experiment was carried out. Subjects used a visual feedback display to maintain the same grip force for smooth and rough manipulandum surfaces. In this case, there was no effect of surface texture on load perception. These results provide evidence that perceived load depends on the grip force used to resist the load. The implications of these results in terms of central and peripheral factors underlying load discrimination are considered.