Arjun is 4 years old and can clearly indicate that two conta…
Arjun is 4 years old and can clearly indicate that two containers of the same size, filled to the same level, hold the same amount of liquid. However, when the liquid from one of the containers is poured into another that is skinnier and taller, Arjun indicates that this new container now holds more liquid than the other. According to Jean Piaget’s theory of cognitive development, which stage is Arjun in and what principle has he failed to understand?
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