Which stage of Piaget's theory is characterized by a lack of understanding of concrete logic?

The preoperational stage, which typically occurs from ages two to seven, is characterized by a lack of understanding of concrete logic and the development of language and symbolic thought. Children in this stage tend to think in a more egocentric way, meaning they struggle to see perspectives other than their own. They also engage in imaginative play and are not yet able to perform operations that require logical reasoning about concrete objects and events.

In contrast, the concrete operational stage, which follows the preoperational stage, is when children begin to understand the concept of conservation and can think logically about concrete events. The formal operational stage involves abstract reasoning and the ability to handle hypothetical situations, whereas the sensory-motor stage, which occurs before the preoperational stage, is characterized by learning through sensory experiences and actions rather than through logical or abstract reasoning. Thus, the preoperational stage distinctly embodies limitations in understanding concrete logic, confirming its significance in Piaget's developmental theory.