Are you allowed to write in second person a research paper?

No, second person ("you") is generally avoided in research papers. The preferred style is usually third person ("he," "she," "it," "they") or first person plural ("we") when referring to the researchers' actions or findings. Using second person directly addresses the reader, which is considered too informal and conversational for the objective tone typically expected in academic writing. It can also lead to ambiguity about whether you're referring to the reader or the subject of the research.