PART ONE-RESEARCH Part One-Research of Three Theorists Although Piaget, Erikson, and Kohlberg are three separate people with three separate ideas of development, they all pretty much cover the same ground. With different time spans, these three theorists touch base on how a person develops su...

Introduction Jean Piaget, a Swiss-born doctor, began his work at the Binet institute, adapting verbal reasoning tests for French children. It took him much of his career to developing his own cognitive-development theory, which was at the time, very unique compared to the dominant behaviorist and p...