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Boolean searching: A method of combining search terms or phrases using AND, OR, and NOT to broaden, narrow, or define your search.

AND = narrows your search

OR = broadens your search

NOT = defines your search by exluding certain terms or phrases

  AND

Use AND to narrow a search and retrieve records containing all of the words it separates, e.g. adolescents AND children  will only find records containing both these words.

     OR

Use OR to broaden a search and retrieve records containing any of the words it separates, e.g.adolescents OR children  will find records containing adolescents only, children only, or both words.

   NOT

Use NOT to narrow a search and retrieve records that do not contain the term following it, e.g. adolescents NOT children will find records that contain adolescents, but will not contain the word children.