Research articles will generally have some version of the following headings. However, it is important to remember that not all research articles will have all of the headings listed, and they may contain some headings not listed below. Therefore, the following information should be used as a guideline when looking for research articles. Here's what to look for:
Literature Review: this article was peer-reviewed, but it is also a literature review. Notice that the subheadings used describe the topic of those sections rather than a portion of the experimental process.
Newberg, A. B. (2011). Spirituality and the aging brain. Generations, 35(2), 83-91. [See the full article.]
Empirical Study: This peer-reviewed study clearly lists (in the abstract and throughout the paper) the intentions of the study, the methods, the results, and the conclusions.
Not pictured here: even though this is a report of original research, the authors still had a length list of References that used to support their research, just as a literature review would include a lengthy list of papers. Scholarship is a conversation!
Semiz, U. M., Basoglu, C., Ebrinc, S., & Cetin, M. (2008). Nightmare disorder, dream anxiety, and subjective sleep quality in patients with borderline personality disorder. Psychiatry & Clinical Neurosciences, 62(1), 48-55. [See the full article.]