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Psychology: Research Methods (PSY33-214)|

Spring 2021

Boolean Operators

Boolean connectors are all about sets. It uses an algebraic concept, but don't let that scare you away. There are three little words that are used as Boolean connectors:


Think of each keyword as having a "set" of results that are connected with it. These sets can be combined to produce a different "set" of results. You can also exclude certain "sets" from your results by using a Boolean connector. See the other tabs in this box for further clarification on the way you can get different results using different Boolean connectors. 

*Boolean Operators need to be UPPERCASE when you type them into the search box.

Boolean Operator AND

Use AND to narrow your search. For example, using "behavior AND intelligence" will find articles with both terms, giving your more specific results.


Boolean Operator OR

Use OR to broaden your results, such as using "behavior OR intelligence" will find articles with either term, giving you more results. You can use synonyms with OR to help find relevant information.


Boolean Operator NOT

Use NOT to filter out results with terms you don't need. For example "pets NOT cat" will filter out articles with the term "cat".