Interactive "How to do Research" map
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Boolean operators are words (or, and, not) used to connect search terms to expand (or) or narrow (and, not) a search within a database to locate relevant information. Boolean operators are also called logical operators or connectors.
For example:
women OR females |
Or retrieves records that contain any of the search terms. It expands the search. Therefore, use "or" in between terms that have the same meaning (synonyms) or equal value to the search. |
women AND media |
And retrieves records that contain all of the search terms. It narrows or limits the search. Therefore, use "and" in between terms that are required to make the search specific. |
image NOT weight |
Not eliminates records that contain a search term. It narrows or limits the search. Therefore, use "not" in front of a term to ensure that the search will not include that term. Warning: Some databases use "and not" instead of "not." Check the database help screen. |
Some databases allow for wild cards to be embedded within a word to replace a single character. For instance, in EBSCO and Infotrac, you can also use the question mark (?) within a word to replace a character. For example:
wom?n will retrieve woman or women
**** **** **** **** **** **** **** **** **** **** ****
Works Cited
"Boolean Searching and Truncation." Oviatt Library. California State University Northridge, 09 Oct. 2008. Web. 17 Feb. 2010. <http://library.csun.edu/Research_Assistance/booleansearching.html>.
"Boolean Operators and Truncation Searching." Using and Evaluating Electronic Sources. Minneapolis Community and Technical College, 29 July 2002. Web. 17 Feb. 2010. <http://camellia.shc.edu/literacy/tablesversion/lessons/lesson4/boolean.htm>.
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