[Etiology of specific types of dysphasia and dyslexia as well as their natural supporting mechanism (theoretical approach and therapeutic response)].

The respective role of the organic and psychological factors is discussed. The importance of the individual's reaction to his own disorder is emphasized. This reaction according to the author promotes an evolution from a simple delay to a specific deviation. It is this reaction that the program "Natural Accompaniment" aims to contain or to defuse in proposing re-educative technics relying upon two principles: demands requiring no effort, priority to the words' significance.