A 3 year-old-child is shown two equal-sized glasses, filled…
A 3 year-old-child is shown two equal-sized glasses, filled to the top with the same volume of water. When asked whether there is more water in one glass than the other, or the same, and she responds, “The same.” Then the entire contents of one of these glasses is poured into a tall, thin glass, and the entire contents of the other into a short, but very wide, glass. Now when asked which glass contains more water, she points to the tall glass. Which of Piaget’s cognitive stages of development is the child in?