Alteration in dialogical communication : the status of the language in the palliation of speech trouble

A great number of defective communication can affect disabled people, who moreover can suffer more or less severe troubles of vision, audition, speaking or mental disabilities. The troubles affecting these functions can be cumulative, and more, motor handicaps of superior limbs can be added, increasing difficulties to found a palliation which cannot be separated from the perceptuo-cognitive system of a person. To translate in text different substitutive means of communication, good linguistic models have to be designed. They must be formal to be computed and to produce efficient technical aids in augmentative and palliative communication. Here we show the importance of a good model of language to obtain a good quality of technical aid.