Intellectual development is based on the kind of experiences that they gain. With time and experience, their memory, problem-solving skills, reasoning and thinking abilities develop.

Stages of Intellectual Development
The intellectual development of a child is marked by certain activities and patterns. There are four distinct stages of intellectual development of a child that have been specified by Piaget.

1. Sensory-Motor Stage

This is the period from birth to 2 years of age where certain activities are observed in a child that marks his growth of mental faculties. At the age of two years, the child starts to show signs of solving simple activity related problems mentally before executing the actions. This is the invention of new means through mental combination.

2. Pre-Operational Period

This early childhood intellectual development phase lasts from 2 to 7 years of age and is marked by the following developments in the child. From the age of 2 to 4 years, language skills of the child develop. His or her speech,
however, is not highly logical. The child can recall and talk about objects that are not presently in sight.

3. Period of Concrete Operations

This intellectual child development stage comprises the mental growth taking place in the child from the age of 7 to 12 years. The child is now able to understand logical patterns and also use them. The mental faculties are now taking a turn towards the understanding and cognition of what is to be done for what. The child is able to understand categories now and can also solve problems logically and correctly.

4. Period of Formal Operations

This is the period of development that takes place from the age of 12 years and above. In this final stage of intellectual development the child is able to start understanding and thinking about abstract concepts. Logic and deductive reasoning becomes comprehensible to the child. Complex logical and abstract sequences become easy for the child to think about and apply in problem-solving.

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