I attended Medline search training at the National Library of Medicine in 1977. It was a heady experience to return to the Texas Medical Center Library and start conducting literature searches for researchers, clinicians, and students who, at the time, did not have direct access to databases.
How things have changed! Medline is freely available, and through HSLIC, you have access to many other databases on a wide variety of topics. Still, you need to construct a search strategy in order to retrieve articles. Most systems now have forms where you can type keywords and often get relevant information.
But, it is very helpful to know that the underlying effective searching of most databases is a basic understanding of Boolean ANDs and ORs – named for George Boole, an English mathematician, philosopher, and logician. ANDing terms indicate that you want to retrieve items that are in both your concepts: CPR AND survival retrieve articles that include both topics. ORing terms are more inclusive – you want retrieval from either concept. CPR OR survival gives you articles that are about CPR as well as articles that are about survival, not necessarily related to CPR – a huge set!
Another important tip in searching databases is to use the “controlled” vocabulary/thesaurus if the system has one. A good example is Medline’s MeSH (Medical Subject Headings), which provides a standard for naming concepts. For example, in MeSH, cancer terms are included under the term Neoplasms and if you search the MeSH term Neoplasms you will get every way cancer is referred to in an article, whether it’s called a tumor, malignancy, cancer, neoplasm, etc.
Also, efficiently searching databases requires knowing the particular system’s syntax for phrases, truncation, etc. Check out HSLIC's Research Guides for Searching for more subject and database-specific information.
Searching databases has certainly become more user-friendly; underlying algorithms and AI make them more so, but maybe less transparent. HSLIC librarians are search experts and willing to help individuals with searches and teach classes on the basics. It’s what we do, so don’t hesitate to Ask a Librarian.
"Venn Diagram for Boolean Operator AND" by Ramaxeymiles is licensed under CC BY 2.0; "Venn Diagram for Boolean Operator OR" by Ramaxeymiles is licensed under CC BY 2.0.