The sensation of pleasantness during tactile exploration

摘要: In everyday life, we frequently explore surfaces with our fingertips to capture aspects of their physics, such as texture or toughness. Furthermore, explorations are often accompanied by a perception (un)pleasantness. It is therefore interest investigate the relationship that could exist between sensation pleasantness and physical attributes explored surfaces. Typically, in touch indirectly assessed, generating ordinal data. Such data lack fundamental psychometric properties essential carry out objective quantitative analyses. To address this problem, probabilistic measurement models (e.g. Rasch model) can be used establish linear, unidimensional invariant scales from scores locating subjects items along single underlying scale. thesis, Model has been basis for future investigations on at fingertip level. Indeed, unidimensional, linear Pleasant Touch Scale developed, which classifies 37 different life materials according levels. The levels suggested perception, occurring during active surface exploration, had certain correlation microgeometry well frictional arising when sliding fingers them. These indications were thoroughly investigated passive tactile exploration experiments. Moreover, effect temperature pleasant was studied. conclusion, all studies indicated topography forces resulting important factors fingertip.