Análise da sensibilidade tátil de cegos, videntes, surdos e ouvintes.

Abstract

This work presents methodologies to evaluate the tactile sensibility from reaction analysis to vibractile stimuli. It was used a vibractile stimulator to test deaf and listeners, blind and sighters. The first step on these tests was to train the subjects in order to identify the several stimuli and afterwards it was asked that the subject's identifical the vibractile frequency trained, so that they could increase or decrease this frequency up to the point that they achieved the target frequency and informed. Five target frequency proximity algorithm were used which are called transformations (linear, quadratic 1, quadratic 2, cubic and logarithmic). The parameters evaluated were the percentual error on the identification of the target frequency and the number of interactions to get it. After a comparative analysis it was observed that the handicapped (deaf and blind) have more tactile sensibility than the ones who are not handicapped (listeners and sighters). It was also developed a tactile stimulator, based on needles and solenoids, and the algorithm to transmit the Braille characters and to accomplish psychophysical tests.