When you pick a topic, it is not set in stone. You may find that you need to revise your question based on the amount and type of literature you find.
This video shows how to broaden or narrow your topic:
Your topic needs to be scalable to your paper. Make sure it isn’t too broad or too narrow. If you notice any of the following while searching for articles and books, you may need to refine your topic.
If your topic is too broad:
Apply journalistic question words to your topic to narrow your focus. (e.g., “Global Warming” > “Global Warming on reptiles in Australia” = what, where)
Who | What | Where | When | Why | How
If your topic is too narrow:
Remove one aspect of your topic and/or use the question words to back up a step.