Jean Piaget is one of the most famous researchers in value development. How did Piaget formulate that there are four levels of moral development?

A. by interviewing families with children
B. by interviewing grandparents
C. by observing male children in the classroom
D. by researching the discipline patterns of parents
E. by observing children at play

E. by observing children at play

A variety of theories exist about how people develop values. Most focus on the stages of development from childhood to adulthood. By observing children at play, Piaget described four levels of moral development.