Primary Literature Defined
Primary literature refers to original studies based on direct observation, use of statistical records, interviews, or experimental methods. They are authored by researchers, contain original research data, and are usually published in a peer-reviewed journal. Primary literature may also include conference papers, pre-prints of articles, or preliminary reports of original research that has been conducted. The term empirical research may also be used.
IMRaD - common formatting for scientific research articles
Introduction
Explains the scope and objective of the study and places it in the context of previously published studies on the subject (a literature review)
Materials and Methods
The what and how for conducting the study: what was used and how it was done
Results
Reports what was found in the study, often using a lot of statistics, charts, and graphs
Discussion
Explains the significance of the results and the meaning the researchers interpret from the results; often includes suggestions for further research and/or describes limitations of the study