Pre-operational stage in Jean Piaget's theory of cognitive development characterizes _________.

The pre-operational stage (roughly ages 2-7) in Piaget's theory is characterized by centration—the tendency to focus on only one aspect of a situation while ignoring others. Children at this stage cannot yet conserve quantity, struggle with reversibility, and show egocentric thinking. Abstract thinking and hypothetico-deductive reasoning are features of the formal operational stage, while conservation and seriation emerge in the concrete operational stage. Centration is the hallmark of pre-operational thought.