Searching using subject headings
Enter your search term and click Search. If you wish to search using Subject Headings leave the Map Term to Subject Heading checkbox checked.
Search for each subject term separately; this gives you more flexibility later when combining your search terms.
Choosing a subject heading
You are taken to a display of subject headings that best match your search term. Select the heading that is the best match.
Use the Scope information icon to find out the definition and coverage of a heading.
If there is no subject heading to match your search terms you can search by keyword instead.
Before continuing click on your chosen heading.
You will now see your heading in the context of other subject headings i.e. the broader and narrower (more specific) headings. Narrower headings will be indented and you can click on the + sign to view even narrower headings.
You can now decide if you wish to search one subject heading only, or include broader or narrower headings as well.
If you want to include all the narrower headings underneath your subject heading, check the Explode checkbox.
Check the Focus checkbox to retrieve articles when your chosen subject heading reflects the main topic of the article.
Note: You can use both Explode and Focus together.