Encyclopedias and general/background sources are excellent for gathering information at the beginning of the research cycle. Background sources are any sources that provide a broad overview of a topic including but not limited to encyclopedias, dictionaries, and atlases. They can provide important dates and names. They can also provide alternate terms and related issues to help a researcher better understand the scope of a topic. Background sources can help a researcher develop a set of keywords and phrases and key ideas which will help with further searches.
"There's nothing more convenient than Wikipedia if you're looking for some quick information, and when the stakes are low (you need a piece of information to settle a bet with your roommate, or you want to get a basic sense of what something means before starting more in-depth research), you may get what you need from Wikipedia. In fact, some instructors may advise their students to read entries for scientific concepts on Wikipedia as a way to begin understanding those concepts."
"Nevertheless, when you're doing academic research, you should be extremely cautious about using Wikipedia. As its own disclaimer states, information on Wikipedia is contributed by anyone who wants to post material, and the expertise of the posters is not taken into consideration. Users may be reading information that is outdated or that has been posted by someone who is not an expert in the field or by someone who wishes to provide misinformation." (from "Harvard Guide to Using Sources")
So, how should you use Wikipedia?
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