For your poster project there are no restrictions between primary research and review articles. But for other assignments in the course you may be required to find a primary research article.
A primary research article reports on new findings based on observation or evidence collection (empirical research) conducted by the authors. It will:
Primary research is often recognized by its five section headings: Abstract, Introduction, Methods, Results, Discussion. Other types of articles in a journal such as editorials, opinions, and letters to the editor do not have this format. Be aware that literature reviews, also called review articles, may have many of these same headings. See below for more information on distinguishing between primary research and literature reviews.
Here are some key features that can help distinguish the difference between primary research and a literature review.