In Defense of Piaget's Theory: A Reply to 10 Common Criticisms.

Jean Piaget: As far as epistemology is concerned, Jean Piaget is considered a pioneer. Piaget is known for collaboration with children and tracks their psychological development. He developed various educational theories and argued that proper child education is essential to prevent social collapse. His treatment and theory, and epistemological research on children, have made Piaget one of the most famous psychologists in history. Albert Ellis: This clinical psychologist is known as the founder of cognitive behavior theory. Albert Ellis developed rational emotional behavioral therapy (REBT) in 1955. It is widely believed that his theory has revolutionized psychotherapy and helped to shift to behavior based therapy. Prior to his death in 2007, Ellis was chosen as "the greatest life psychologist" by "psychology of the day". He also worked in the fields of sex and religion.

Piaget's cognitive development theory is a comprehensive theory about the nature and development of human intelligence. It was originally created by Swiss development psychologist Jean Piaget (1896-1980). This theory includes the nature of knowledge itself and how humans acquire, build and use knowledge. The theory of Piaget is mainly called the development theory. For Piaget, cognitive development is a gradual reorganization of psychological processes caused by biological maturity and environmental experience. He believes that children build the understanding of the world around them, experience the differences between what they already know and what they find in the environment, and adjust their ideas accordingly . In addition, Piaget argues that cognitive development is the center of human biology and language depends on knowledge and understanding gained through cognitive development.

Jean Piaget's cognitive development theory is well-known in psychology and education, but has received considerable criticism as well. Although it is presented in a series of stepwise phases, we believe that development does not necessarily follow such a smooth and predictable path. Most of the criticism of Piaget 's work is related to his research method. One source of the main inspiration of this theory was the observation of his own three children by Piaget. In addition, other children in Piaget's small research samples come from well-educated experts with high socio-economic status. Due to this non-representative sample, it is difficult to extend his findings to a larger population.