Start by reading the article abstract. Does the author talk about their data and methodology?
Look at the article itself. Most will follow a particular structure:
Start by reading the abstract. Does the author talk about gathering literature and reviewing existing studies?
You can use a review article in your reference list to talk about the overall trends and findings on your topic.
The PsycINFO database records the Methodology for each article indexed in the database. You can use this criteria to limit your search to a particular article type, or to verify the type of article you have found.
There are several ways to do this:
1. When setting up your search, use the Advanced Search - Search Options
2. After running a search, use the Refine Results facet
3. When looking at the detailed record for an article