When first beginning a literature search, you must decide:
What kind of information you are looking for?
- Information in popular periodicals such as The New York Times, Wall Street Journal? Often articles in these popular periodicals can lead you to references to the scholarly literature.
- Information that has been aggregated from many sources (such as a textbook)? (Even in a recently published book, information may be at least 3-5 years old.)
- Information in scholarly journal articles? This is the place to find the most recently published research evidence. (A PICO(T) question is usually answered by accessing the scholarly journal literature.)
- Ready reference information: a fact, a definition, a short description, drug side effect, etc.?
What aspects of your topic are you interested in?
- Are you interested in the historical, ethical, psychosocial, or policy aspects of the topic? Or are you interested in the clinical/biomedical aspect of the topic?
How much information are you looking for?
- What is the scope of your project?
- Do you want several recent articles on the topic?
- Are you writing a paper and just need some background information plus some recent information (from journals)?
- Are you writing a dissertation?
- What level of evidence do you require? Are you looking for evaluated, peer-reviewed, scholarly sources? Do you want information appropriate for clinical application? *Remember critical appraisal must come first!*