Hollins M, Bensmaïa S, Karlof K, Young F
Department of Psychology, CB# 3270, Davie Hall, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
Percept Psychophys. 2000 Nov;62(8):1534-44. doi: 10.3758/bf03212154.
Ratio scaling was used to obtain from 5 subjects estimates of the subjective dissimilarity between the members of all possible pairs of 17 tactile surfaces. The stimuli were a diverse array of everyday surfaces, such as corduroy, sandpaper, and synthetic fur. The results were analyzed using the multidimensional scaling (MDS) program ALSCAL. There was substantial, but not complete, agreement across subjects in the spatial arrangement of perceived textures. Scree plots and multivariate analysis suggested that, for some subjects, a two-dimensional space was the optimal MDS solution, whereas for other subjects, a three-dimensional space was indicated. Subsequent to their dissimilarity scaling, subjects rated each stimulus on each of five adjective scales. Consistent with earlier research, two of these (rough/smooth and soft/hard) were robustly related to the space for all subjects. A third scale, sticky/slippery, was more variably related to the dissimilarity data: regressed into three-dimensional MDS space, it was angled steeply into the third dimension only for subjects whose scree plots favored a nonplanar solution. We conclude that the sticky/slippery dimension is perceptually weighted less than the rough/smooth and soft/hard dimensions, materially contributing to the structure of perceptual space only in some individuals.
比率缩放法用于从5名受试者那里获取对17种触觉表面所有可能配对成员之间主观差异的估计。刺激物是各种各样的日常表面，如灯芯绒、砂纸和人造毛皮。使用多维缩放（MDS）程序ALSCAL对结果进行分析。在感知质地的空间排列上，受试者之间存在实质性但并非完全的一致性。碎石图和多变量分析表明，对于一些受试者，二维空间是最佳的MDS解决方案，而对于其他受试者，则表明是三维空间。在进行差异缩放之后，受试者在五个形容词量表上对每个刺激物进行评分。与早期研究一致，其中两个量表（粗糙/光滑和柔软/坚硬）与所有受试者的空间都有很强的相关性。第三个量表，粘性/滑溜，与差异数据的相关性更具变化性：在回归到三维MDS空间时，只有那些碎石图支持非平面解决方案的受试者，它才会急剧倾斜到第三维度。我们得出结论，粘性/滑溜维度在感知上的权重小于粗糙/光滑和柔软/坚硬维度，仅在某些个体中对感知空间的结构有实质性贡献。
