Introduction Thinking is a daily process that always accompanies the human being. Like walking, thinking is a natural action we perform permanently. Because it is a vital process that every body needs, thinking became the subject of discussion for ages. Since the Greek philosophers until today no ...

Jean Piaget was a Swiss psychologist famous for his pioneering studies of the development of thought processes, particularly in children. He is generally considered to be one of the most important figures in modern developmental psychology and his work has had a great inf...

1. Erik Erikson is responsible for developing the epigenetic principle. This principle is a stage theory that describes human development and growth from birth to death. Unlike Freud's stage theory, Erikson's epigenetic principle extends into adulthood and describes the theories through whic...