Sophie has been shown two short, wide, transparent cylinders that contain equal amounts of water. The researcher now pours the liquid from one cylinder into a tall, thin cylinder. Sophie is asked which container has more liquid, and she replies that the tall container has the most, indicating a developmental error also known as an inability to

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Sophie is demonstrating an inability to conserve, which means she is unable to understand that even though the liquid has changed shape, the amount remains the same. This is a common developmental error in young children. Choice A (reverse) does not accurately describe the error being made in this scenario.

Sophie Has Been Shown Two Short, Wide, Transparent Cylinders That