Which cognitive ability becomes possible in the Concrete Operations stage?

• A. Reasoning about objects that are not present
• B. Reversibility of actions
• C. Egocentric thought
• D. Magical thinking

Answer: (B)

Concrete Operations brings in the ability to think logically about actions that can be reversed, applied to real, tangible things. Reversibility means a child can imagine undoing an operation and returning to the starting state. This lets them understand that a change in shape, position, or quantity can be reversed to restore the original condition. For example, if you pour water into a different container and then pour it back, the amount remains the same; or with numbers, you can add and then subtract to return to the original total. This capacity underpins understanding of conservation and other logical relationships with concrete objects.

The other ideas describe abilities typical of earlier or later stages. Reasoning about objects not present tends to be more hypothetical or abstract and aligns with later formal operations. Egocentric thought and magical thinking are hallmarks of the preoperational stage, when perspective-taking is limited and logic isn’t yet applied to real transformations.