Research articles, empirical, research primary research, are based on original research. If you need to limit your sources to research articles, you must be able to tell the difference. Most research articles will contain the following:
A summary of the article. (Note: Abstracts appear in reviews or secondary articles as well.)
Sometimes called "methodology" or "materials and methods," this section describes the author's research methods and tools: experiment, survey, data sources, etc.
Also called "findings," this is the section of the article in which raw data are presented.
Sometimes called "analysis," this is the section in which the author analyzes the data.
The author's conclusions based on the analysis.
List of references to works cited in the article.
These standard parts of a research article may not always be labeled, and sometimes they are combined (for example, "Data and Methods"). Still, every research article indicates what methods and tools were used to conduct the research, what the results were, and how the author interprets those results.
Not every article in a scholarly journal contains research or analysis. Scholarly journals may also include:
These are not original or primary research articles.