Hollins M, Faldowski R, Rao S, Young F
Department of Psychology, University of North Carolina, Chapel Hill 27599.
Percept Psychophys. 1993 Dec;54(6):697-705. doi: 10.3758/bf03211795.
The purpose of this study was to examine the subjective dimensionality of tactile surface texture perception. Seventeen tactile stimuli, such as wood, sandpaper, and velvet, were moved across the index finger of the subject, who sorted them into categories on the basis of perceived similarity. Multidimensional scaling (MDS) techniques were then used to position the stimuli in a perceptual space on the basis of combined data of 20 subjects. A three-dimensional space was judged to give a satisfactory representation of the data. Subjects' ratings of each stimulus on five scales representing putative dimensions of perceived surface texture were then fitted by regression analysis into the MDS space. Roughness-smoothness and hardness-softness were found to be robust and orthogonal dimensions; the third dimension did not correspond closely with any of the rating scales used, but post hoc inspection of the data suggested that it may reflect the compressional elasticity ("springiness") of the surface.
本研究的目的是检验触觉表面纹理感知的主观维度。十七种触觉刺激物，如木材、砂纸和天鹅绒，在受试者的食指上移动，受试者根据感知到的相似性将它们分类。然后使用多维标度（MDS）技术，根据20名受试者的综合数据，将这些刺激物定位在一个感知空间中。判断一个三维空间能对数据给出令人满意的表示。然后，通过回归分析将受试者在代表感知表面纹理假定维度的五个量表上对每种刺激物的评分拟合到MDS空间中。粗糙度-光滑度和硬度-软度被发现是稳健且正交的维度；第三个维度与所使用的任何评分量表都不太相符，但对数据的事后检查表明，它可能反映了表面的压缩弹性（“弹性”）。
