This series of tutorials, created by Yale University Library, cover the fundamental concepts and general procedure of searching the health science literature in a systematic manner.
Boolean Operators are simple words used as conjunctions to combine or exclude keywords in a search, resulting in more focused and productive results. Using these operators can greatly reduce or expand the amount of records returned. Boolean operators are useful in saving time by focusing searches for more 'on-target' results that are more appropriate to your needs, eliminating unsuitable or inappropriate.
Use OR to broaden search results. This expands the search to include all records containing either concept. Think of using OR in terms of synonyms or related terms.
AND will narrow your search results to include only relevant results that contain your required keywords.
Use NOT in a search to exclude words from your search and narrow your search, telling the database to ignore concepts that may be implied by your search terms.
Databases follow commands you type in and return results based on those commands. Be aware of the logical order in which words are connected when using Boolean operators:
Check the "The Boolean Machine by Rockwell Shrock"
Advanced search options are a set of filters offered by most search engines on the web. They narrow the scope of a search query to eliminate irrelevant information to help you find the exact content you're looking for.
If your search returns few or no records, you might have more success if you can think of alternative search terms. This can include:
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