A hallmark achievement of concrete operational thought is being able to

Question

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Concrete operational thought allows children to understand that even if the appearance of an object changes, its quantity or volume remains the same (conservation). This is typically tested using tasks such as the conservation of liquid and number tasks. Object permanence is a skill developed during the sensorimotor stage, while relativistic thinking and hypothetical problem-solving develop later in adolescence.

A Hallmark Achievement of Concrete Operational Thought Is Being Able