Post History
You've pretty much got the 3 choices. Use first person with active voice, use passive voice, or use 3rd person stating "the author" (or "the writer," "the researcher," etc). I will say it depends...
Answer
#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/39633 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/39633 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
You've pretty much got the 3 choices. Use first person with active voice, use passive voice, or use 3rd person stating "the author" (or "the writer," "the researcher," etc). I will say it depends on the field. I too was taught that only the latter two were acceptable (and mostly the passive voice one). But I've seen plenty of academic papers that use first person (mostly I've seen it in plural, but not entirely). As long as it's done sparingly and very professionally, it can work. But it really depends on what your peers have done. In your case, it depends on what your professor thinks is okay. You can always ask!