There are three stages of cognitive development during adolescence:
First stage is the Early adolescence. In this stage, thinking becomes more complex with reasoning and is focused on personal decision making in all aspects, like home, play and school.
Second stage is Middle adolescence in which complex thinking process as well as experience makes the adolescent more concerned about abstract issues like the philosophical and futuristic ones.
The third stage is the Late adolescence where complex thinking processes are focused on self centered concepts and decision making again, but with increased thoughts about global concepts like justice, history, politics, and patriotism.
