The development of formal operations in adolescence leads to extroverted behavior a lessening of self-analysis compared to preoperational thought introspection and egocentrism thinking in terms of concrete things thinking more about others than themselves

The development of formal operations in adolescence leads to "introspection and ego-centrism".

Ego-centrism is simply the failure to separate or differentiate between yourself and other. Particularly, it is the powerlessness to unwind subjective blueprints from target reality; a failure to comprehend or expect any point of view other than their own.Introspection is the examination of one's own conscious considerations and feelings. In psychology, the procedure of contemplation depends solely on perception of one's psychological state, while in a spiritual context it might allude to the examination of one's spirit. Introspection is firmly identified with human self-reflection and is diverged from outer perception.

Who it was like back then