Development of ideas
for the development of the ideas that will be discussed at the concept of Piaget (Piaget) which has studied the cognitive development of humans. The cognitive development in infants, it is a term of. Sensori-motor Operation (birth - 2 years) and is divided into six developmental stages during the first period of comparison, the theoretical development of Ericsson. In the first years of age. Are opposed to the concept of Piaget, has four phases.