Focus is Too Narrow
A narrow focus covers too little about a topic. It gets so close to the topic that the writer cannot possibly say more than a few words. For example, writing about gender interactions in one of your classes is too narrow. You can use your class to make a point about gender interactions, but chances are, you'll find nothing specific in the library about your particular class. Instead, you might look at gender interactions in group settings, and then use your class as an example to either agree or disagree with your research. Be careful not to make your focus too broad as a result.