1. Sensori-Motor (0-2) 2. Pre Operational (2-7) 3. Concrete Operational (7-11) 4. Formal Operational (11-14)
Sensori Motor Stage(0-2)
The most significant achievement in this stage of life is object permanence. An infant does not have a developed memory, and due to this reason things’ impression on an infant’s mind does not last for long. Thus when an infant watches an attractive colorful thing for example, he goes for it and wants to grab it. However, if that object is removed from the sight of the infant, he no longer searches for it. From this observation Piaget concludes that infants do not have a well defined memory, for had they possess a well defined memory they would have remembered that object and tried to search for it.
However by the age of 11 months, infants develop this kind of memory and then they are able to pursue objects even if…