Nagoya Institute of Technology, Department of Electrical and Mechanical Engineering, Nagoya, Japan.
JST, PRESTO, Kawaguchi, Japan.
PLoS One. 2019 Jan 30;14(1):e0211407. doi: 10.1371/journal.pone.0211407. eCollection 2019.
Previous studies have demonstrated that skin vibration is an important factor affecting the roughness perception of fine textures. For coarse textures, the determining physical factor is much less clear and there are indications that this might be participant-dependent. In this paper, we focused on roughness perception of both coarse and fine textures of different materials (glass particle surfaces and sandpapers). We investigated the relationship between subjective roughness ratings and three physical parameters (skin vibration, friction coefficient, and particle size) within a group of 30 participants. Results of the glass particle surfaces showed both spatial information (particle size) and temporal information (skin vibration) had a high correlation with subjective roughness ratings. The former correlation was slightly but significantly higher than the latter. The results also indicated different weights of temporal information and spatial information for roughness ratings among participants. Roughness ratings of a different material (sandpaper versus glass particles) could be either larger, similar or smaller, indicating differences among individuals. The best way to describe our results is that in their perceptual evaluation of roughness, different individuals weight temporal information, spatial information, and other mechanical properties differently.
先前的研究表明，皮肤振动是影响精细纹理粗糙度感知的一个重要因素。对于粗糙纹理，决定性的物理因素则不太明确，有迹象表明这可能与参与者有关。在本文中，我们专注于不同材料（玻璃颗粒表面和砂纸）的粗糙和精细纹理的粗糙度感知。我们在 30 名参与者组成的小组中研究了主观粗糙度评分与三个物理参数（皮肤振动、摩擦系数和颗粒大小）之间的关系。玻璃颗粒表面的结果表明，空间信息（颗粒大小）和时间信息（皮肤振动）与主观粗糙度评分高度相关。前者的相关性略高于后者。结果还表明，参与者对粗糙度评分的时间信息和空间信息的权重不同。不同材料（砂纸与玻璃颗粒）的粗糙度评分可能更大、相似或更小，这表明个体之间存在差异。描述我们结果的最佳方式是，在他们对粗糙度的感知评估中，不同个体对时间信息、空间信息和其他机械特性的权重不同。
