Sorry, I can not reply your question about Part time and Full time. For international students, they should register as full-time student. This is an important policy after 9.11, because US do not want those terrorists register as part-time student so they have time to do something terrible. So you should pay attention to this. But you can apply to register part-time student due to some special matters, maybe such as some health problems. Anyway, consult with the international office in your school.
Just saw your message,Sorry for late response,:-) Thanks a lot.I will go to Graduate School Office and ask them .Hopfully I can get a nice answer. I will try to make me to remain a full-time student. Thanks again.
mashpotato, you are J2, right? As a sevis manual says indirectly, a J2 can register under pending status. Additionally, there is not any regulation preventing J2 from going school on part-time basis. So, even if you are part-time, that won't affect your status(shen1fen4) here.