Answer: Egocentrism.
Step-by-step explanation:
In Jean PiagetĀ“s theory of cognitive development, the formal operational stage starts around twelve years old and is when adolescents become able to apply abstract thinking, without requiring concrete manipulation.
Adolescent egocentrism is how they process social matters, as they are still incapable of distinguishing their own understanding from other peopleĀ“s reasoning.