|Fall 2004||Vol. XIX, No. 3|
Editor: Robert M. Joven, MLS Information & Education Services Ext. 8493 E-mail - firstname.lastname@example.org
The Preview/Index search feature provides a variety of options for constructing a search strategy easily.
If you do not use Preview/Index when you search PubMed, the search will be run for you in the following manner. PubMed has an automatic term mapping feature that compares the term(s) entered in the query box with terms in the MeSH (Medical Subject Headings) index, the journal titles index and the author index, in that order. Any terms that are not found are then searched again as individual terms following the mapping procedure, and if still not found in those indexes in this manner, they are then searched in All Fields. If no Boolean operator (AND, OR, NOT, caps are required) is specified the default is AND.
The Preview/Index search feature can be used to:
Specify the search field(s)
To select the field in which to search use the ‘All Fields’ pull-down menu and highlight the field. Type your search term in the text box adjacent to it and click on preview to display your results in the list of most recent queries.
To find citations to articles authored by CG Pick, select author from the field pull-down menu, type Pick CG in the text box, and click on preview.
Create a search composed of multiple terms or fields
Preview/Index can be used to easily construct a search strategy composed of multiple terms from the same field or from different fields.
To get your final results click on either Preview or Go.
As we saw in the
first search example, retrieval on the search term ‘asthma’
is very large and you would want to narrow your results by focusing or
refining your search strategy. You could accomplish this in a number of
ways, for example by adding additional terms/concepts to the search strategy,
by limiting the field being searched, by limiting to some specific aspect
of asthma, or by using some of the features of ‘Limits’ such
as limiting the range of publication dates, to English language articles,
or to human.
you can either preview your results or you can select from the Boolean operator buttons (AND, OR, NOT) to add the term to the query box to be searched singly or in combination with other terms.
This method can be used to construct search strategies of one or multiple terms.
"asthma/chemically induced"[MeSH Terms] OR "asthma/congenital"[MeSH Terms] OR "asthma/genetics"[MeSH Terms]
Hint: hold down the Control key to select multiple terms from the index.
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Last Updated: February 26, 2008