One way to visualize Boolean Operators is to use a Venn diagram. See below or watch the video to the right.
Use SUBJECT SEARCHES.
Subjects: United States; Border security -- Political aspects; Immigration policy -- Political aspects; Walls -- Design and construction; Trump, Donald -- Social policy
The above subjects describe the content of the PRI Radio Broadcast, citation:
“The ‘Real’ Border Crisis: The US Immigration System Isn’t Built for Kids and Families.” PRI’s The World, 2019. EBSCOhost, lib-proxy.sunywcc.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=edsglr&AN=edsgcl.568783192&site=eds-live.
Use truncation (asterisk) and wildcards (usually a question mark or exclamation point).
Child* brings up child, children, childhood, and any other word that starts with the root "child." This works in most of the databases.
Globali?ation brings up items with the words globalization or globalisation.
If you don't use truncation and wildcards, some databases will look for an exact match to the words you type, and you may miss some relevant materials.
Brainstorm all the possible ways to express your topic. Brainstorm until you've exhausted all possibilities. An article about medical device inventions may not have the phrase "biotechnology" anywhere in it. Instead, you may find that the title contains the words "medical technology" and a cataloger has assigned it the subject heading "medical devices."
Innovations in healthcare
Wearable heart rate monitors
To get the best results, use the word OR inside parentheses.
(biotech* OR biomedical tech*) and cancer
Another way to think about this is Broadening or Narrowing your search terminology.
Facebook (Narrow) >> Social Media (Broader)
social phobia (Narrower) >> Anxiety Disorder (Narrow) >> Mental Health (Broader)
As you begin to find information, keep an eye out for: