Melisa and Sydney E

What is Piaget's theory of cognitive development?

Born- August 9, 1896, in Neuchâtel, Switzerland

Died-September 16, 1980, in Geneva, Switzerland

Piaget's theory of cognative development is a comprehensive theory about the nature and development of human intelligence. Piaget believed that one's childhood plays a vital and active role in a person's development. Piaget's idea is primarily known as a development stage theory.

What is class inclusion in child development?

The class-inclusion task is regarded by Piaget as a measure of the child's mastery of the structure of hierarchical classification. Class-inclusion was improved by changing the wording of the question to conform to standard English usage.


He became intrigued with the reasons children gave for their wrong answers to the questions that required logical thinking. He believed that these incorrect answers revealed important differences between the thinking of adults and children.

After watching many children, he felt that all children went through a series of four stages in the same order. Some children advanced through a stage faster than other children. The first stage that he observed was from birth to two years of age. Piaget called this the sensorimotor period. Children in this stage have a cognitive system that is limited to the motor reflexes.

What did Jean Piaget contribution to psychology?

Over the course of his career in child psychology, he identified four stages of mental development, called “schema.” He also developed new fields of scientific study, including cognitive theory and developmental psychology.

His best selling book is called- The Psychology of the Child