According to Piaget the process of cognitivo development becomes for successive stages where the intellectual structures if constrem Piaget gradually divided the development in four periods of training, each stadium is different of the other of the qualitative point of view, has its proper forms of adaptation to the way. The development goes in the direction of one better adaptation of subject to the half o. The Sensrio-Engine Period of training – this stadium is placed approximately enters 0 to the 24 months of life, and is characterized by a practical intelligence, that is, is applied in the resolution of problems based in the action, the movement and the perceptions. It is in this period that the acquisitions are faster and more numerous. At the beginning of this A stage the child meets in a state of indeferenciao between it and the world, if not destinguindo, therefore, of objects they encircle that it, nor understanding the relations between objects independently of it. Instead of words the child serves of perceptions and movements organized in share projects.
In the presence of a new object, beb successively incorporates it in each one of its projects of action, as for example, to shake, to rub, to balance, as if it dealt with understanding them for the use. Throughout these two years, and the level of the action, it goes to construct some basic slight knowledge for the later development, among which if they detach of permanent object the causalidade. According to Piaget, the best way of if understanding the object concept in the child of this age are to observe its behavior when an object disappears or is hidden. Parallel the objective child the practical notion of causalidade. For example when she pulls the lace of a toy hung on the cradle apercebe with affability of the oscillations that she provoked. This share that is on to the activity of its proper body, goes to be generalized, allowing it to act on objectos, exactly long-distance.