Narrowing and Broadening a Search
To create a productive yet relevant search strategy you must combine the most important words or key concepts identified in your research question using the AND, OR and NOT Boolean operators. The way key concepts are combined directly influences the results of your search. Combinations that broaden a search increase results while combinations that narrow a search decrease results.
|OR||Facebook or MySpace or Social Networking||Broadens||Increases|
|AND||Facebook and MySpace and Social Networking||Narrows||Decreases|