Alice is sitting at the table with her son Nikko. She takes his tall glass of milk, and pours exactly half of it into a shorter wider glass. Then she says "Honey, which glass has more milk?" Nikko immediately points to the taller glass. Nikko has not yet mastered Piaget's skill of _____________.
A) centration
B) egocentrism
C) object permanence
D) conservation

Question

Quizplus · Accepted Answer

Nikko has not yet acquired the concept of conservation, which is the understanding that a quantity remains the same even when its appearance is altered in some way. In this situation, although the two glasses have the same amount of milk, Nikko focuses on the appearance of the taller glass and assumes it has more milk. This is a common developmental milestone that children acquire around age 6 or 7.

Alice Is Sitting at the Table with Her Son Nikko