Preoperational children's irreversible thinking is illustrated by their performance on which type of tasks?

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Preoperational children's irreversible thinking is illustrated by their performance on conservation tasks. In these tasks, children are unable to understand that changing the appearance of an object does not change its fundamental properties. For example, they may think that pouring water from a short, wide glass into a tall, thin glass somehow changes the amount of water present. This inability to grasp conservation demonstrates their limited cognitive abilities and their lack of understanding of certain basic concepts.

Preoperational Children's Irreversible Thinking Is Illustrated by Their Performance on Which