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UBC Library Informatics for Nursing: 1.06 Boolean operator: AND

An overview of searching Academic Literature for Nursing students

1.06 Boolean operator: AND

When you want to find articles containing two or more different concepts, connect the words in your search with AND. Using AND between keywords means that both terms must appear somewhere in the record. AND is used to narrow a search. Example: hypertension AND yoga

Instructions

Let's search in PubMed.

  1. Enter the search term infection in the search box. Press EnterHow many items did this search retrieve?  
  2. Enter the search term hospital in the search box. Press EnterHow many items did this search retrieve?  
  3. See your search history by clicking on the Advanced link.
  4. Let's CONNECT the two CONCEPTS with the Boolean search term AND to narrow the search.
    Enter the search term infection AND hospital in the search box. Press Enter. How many items did this search retrieve?  Hint: Show me By combining both keywords with the Boolean operator AND, you will have found items which have both keywords in its record. 
  5. We can make our search results more precise by adding additional terms with the Boolean operator AND. Enter the following search infection AND hospital AND airborne in the search box. Press Enter.
  6. Note how many items you found. Hint: Show me

 

Practice Exercise: Boolean Operator AND