An analysis of individual differences on sensory measurement of roughness

Abstract

A series of experiments on sensory measurement (paired comparison) of roughness of turned surface was carried out. The purpose of the present investigation is to clarify individual differences on the measurement and to assess three models: Kruskal's nonmetric multidimensional scaling, Factor analysis and Carroll-Chang's vector model. The results are: (1) With first model, the structure of sensory measurement of roughness and group differences are derived. (2) With second model, inter-individual homogeneity become clear. (3) With last model, inter-individual heterogeneity become clear. Differences among three models and usefuleess in industrial inspection are discussed. The limitation of these models are also discussed.