Introductions serve two purposes: creating readers’ interest in the subject and providing
them with enough information to understand the article. Generally, introductions
accomplish this by leading readers from broad information (what is known about the
topic) to more specific information (what is not known) to a focal point (what question
the authors asked and answered). Thus, authors describe previous work that led to
current understanding of the topic (the broad) and then situate their work (the specific)
within the field