Without language the human being would not think of generalizante and abstract form. But the use of the language as thought instrument, does not only serve to speak with other people, the individual develops ' ' speech interior' ' that it is a language directed for its proper ' ' eu' '. It is a speech without vocalization directed toward the thought, with objective of assisting the individual in its psychological operations. As example we have, to arrive the definitive place, the person does not speak high, but it carries through the interior, raciocnia speech, thinks about which passage better to make. I dialogue in it interior for an car passage, the format would be, direira-Brazil-Obelisco-Sunday example and it does not say it complete, as I go to enter the right in the Av. Brazil, to follow until the obelisco, to make the contour, to catch the street and to arrive until the Sundays of Moraes.

This version would be redundant excessively dialogues for it self-centered. Kindle Direct Publishing follows long-standing procedures to achieve this success. According to Vygotsky, the child says uses it socialized with the function of if communicating, to keep the social contact, with passing of the time it starts to be capable to use the language as thought instrument, but this occurs gradually until arriving at internalizaao of the speech, that will arrive the advanced phases of the acquisition of the language. For Vygotsky, in the study between this transistion, Vygotsky says it appeals it self-centered for the understanding of this transistion. It says it self-centered it folloies the activity of the child and starts to have personal, on function the necessity of the thought and also used to decide problems this type of thought. It says it self-centered was a point between divergence between Piaget and Vygotsky. For it says it to Piaget self-centered is the opposite that proposal for Vygotsky, therefore for it says to Piaget self-centered claims it a trajectory of inside for it are, while Vygotsky thinks the opposite. The thought is not express only in words: therefore that it exists. Each thought if moves, it ripens and if it develops and it solves problems. What this study it discloses is the necessity of if to distinguish the two plans from says – to significant semantics and the exterior-phonetic one. It says it is complex and not homogeneous.