Hey there. I tested as an INTP and it seemed to fit (even majored in physicis) until I met a true INTP and saw what the difference was (am an INFP). I think you can test any way, especially if your close to the middle on any axis. Not only that but a lot of these tests are based on maybe 10 questions about say Introversion/Extraversion, so if you answer 1 or 2 that could skew things too.