Titles help consumers of research to identify journal articles of interest to them. A preliminary evaluation of a title should be made when it is first encountered. After the article is read, the title should be re-evaluated to ensure that it accurately reflects the contents of the article. In order to help potential readers locate those that are most relevant to their needs, researchers should use titles that are sufficiently specific so that each article can be differentiated from the other research articles on the same topic. While a title should be specific, it should be fairly concise. When researchers examine many specific variables in a given study, they may refer to the types of variables in their titles rather than naming each one individually. Because research rarely yields simple, definitive answers, it is seldom appropriate to use a title that poses a simple "yes–no" question.