Is it possible to do research, in your PhD, on the same topic that you did for your Master's dissertation? I was wondering if it's possible to use the same research question, just using different methodology and a more expanded research area.I don't mean if you can just extend the topic of your Master's thesis into something that you're going to research on, in your PhD (as in your MA thesis becoming one or two chapters of your PhD thesis).
Researching the same topic for a Ph.D. as a Masters is entirely possible, and not necessarily even all that unusual (it depends on how you define "same").  If the Masters is a first set of results on the topic, and the Ph.D. then pursues a significant advance thereupon, that would be an entirely reasonable progression of research.