Use both methods for the best results
Begin with a keyword search.
Browse the results and look at the full record of an especially appropriate article.
Scroll down to the subject headings/descriptors.
Click on the best subject heading/descriptor link.
Write down other listed subject terms and continue searching with those terms.
Free text, natural language or keyword searches are used with computerized databases and search engines.
+ Excellent for new concepts or terminology
+ Will retrieve lots of results
- Must think of all other synonyms
- Results will often not be about your topic (your term was only mentioned in the article)
Controlled vocabulary, descriptors, index terms or subject headings are used in computerized databases. Articles are analyzed and the content is matched to a limited number of specified terms.
+ Results will be about your topic
+ No need to think of other synonyms
- If you don’t use the correct term, you could miss some or all pertinent information