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What's The Difference Between Keywords and Subject Headings?
A keyword search allows you to use your own words to describe what you're looking for. Keyword searching is how you typically search the Web using search engines like Google or Bing.
PROS of keyword searching:
Quick, easy to brainstorm
Good starting point for most types of research
Produces good results in certain databases (e.g., Google Scholar)
Flexible allows you to combine terms together in many different ways – CONS of keyword searching:
Often produces too many or too few results
Results are not always relevant
May miss items that use different terms to talk about the same topic.
Subject headings describe the content of an item using terms that are standardized across a database. A subject heading search will return all items on that topic in a database.
To find out whether a particular database uses subject headings, look for a link labelled Thesaurus or Subject Terms. Many databases allow you to search or browse their subject headings.
PROS of subject headings:
Can be used to focus or expand your search
Produces highly relevant results in most databases
Returns all items on a given topic in a particular database, regardless of the terminology used in the article itself
CONS of subject headings:
Less flexible than keyword searching (e.g., you may have to combine multiple subject headings to describe your research topic)
Subject headings are different every database