Peggy's parents are amazed at how much their daughter has changed. over the past year, she became interested in doing chemistry experiments. peggy predicts what will happen when she combines tw

It might be seen that Peggy is most like in the formal operational stage of cognitive development. The term makes reference to the 4th and final stage of Piaget's theory of cognitive development. In this stage the abstract thought and hypothetical reasoning mark this phase of development.