Seven-year-old Marvin and four-year-old Edgar are sitting at the table as their mother pours milk into their glasses.Both glasses are the same size and shape.However,Marvin's mother notices a chip on the lip of his glass,and decides that it is safer if she pours that milk into another glass.The new glass is shorter and much wider,and when she pours the milk into the new glass Edgar laughs and says that now he has more milk than Marvin.However,Marvin is not upset because he knows that he still got the same amount of milk.Which Piagetian principle is Marvin demonstrating?

Question

Quizplus · Accepted Answer

Marvin is demonstrating the principle of conservation, which is part of Piaget's concrete operational stage. Conservation is the understanding that quantity remains the same despite changes in shape or appearance.

Seven-Year-Old Marvin and Four-Year-Old Edgar Are Sitting at the Table