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Nursing Resources: A Self-Paced Tutorial and Refresher
An online instructional tool to orient users to the NYU virtual environment: books, databases, articles, more.
Understanding "Boolean" operators is fundamental to database searching!
Boolean logic uses the operators AND and OR to connect search terms when using catalogs, databases, or a web search tool.
For example: a research question with a Problem AND Intervention:
Do exercise programs reduce the incidence of accidental falls in the aged population?
Combine two terms with ANDfor a preliminary literature search:
A simple search on: fallsretrieves ALL article citations containing that term.
Adding a search term using AND retrieves citations with BOTH search terms, e.g.: falls ANDexercise
Adding additional terms with AND narrows the results.
ORis used to connect synonyms. A search using OR retrieves citations with ANY of search terms present,
e.g.: (exercise OR physical fitness OR swimming). Notice that synonyms are nested within parentheses.
Connecting terms with OR will retrieve more results. (OR retrieves MORE!)
Putting it all together, this search retrieves results with the word falls and any one of the terms nested within parentheses: falls AND (exercise OR physical fitness OR swimming).
Watch the video below, a PubMed search, that demonstrates Boolean connectors.