Look for an article that discusses the theoretical framework of the research presented that has to do with borderline personality and sleep
Choose an article that explicitly mentions the theoretical framework or theory that it uses. If after reading the article, you do not see theory mentioned, then you need to choose another article.
The assignment calls for “two primary research articles“ not a review of research, so you have to find articles where the authors conducted research themselves. For a primary qualitative article, they will have to state the research problem or question and state the constructs. For a primary quantitative article, the hypothesis and variable will need to be stated. For both, the articles should state the methods used, the data analysis, and there should be a discussion.