图 How to narrow down a topic A general topic Computer A more specific topic Computer Games A more specific topic Computer Games and Its Influence on Behavior An elaborated topic 4 Computer Games and Aggressive BehaviorHow to narrow down a topic A general topic A more specific topic A more specific topic An elaborated topic 4 3 2 1 → Computer → Computer Games → Computer Games and Its Influence on Behavior → Computer Games and Aggressive Behavior