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Intelligence profile:

Piaget's theory about the process of cognitive development and intelligence:

 

The following four sub-hierarchies include Hierarchies of cognitive developments, where as a successful balance in each period, requires to reach equilibrium in the previous step.

 

1 - The sensory - motor (from birth to 2 years old).

2 - Pre-operational (2 to 7 years old).

3 - The objective function (7 to 11 years old).

4 - Formal operational

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