Can one's PhD work be an extension of their Masters research? I am currently pursuing a Masters degree in Literature, and I see potential in further research on the current topic of my dissertation for a PhD in the future. I have been told that an Honours thesis cannot be used as a foundation for a Masters dissertation, so i am wondering if a Masters dissertation can be used as a base for a PhD dissertation later on.
Seeing your question, I guess this can vary from field to field, but the practice I've seen (engineering, neuroscience, and psychology) is that the PhD work often is an extension of the masters research. The masters work explores one facet of the research problem, and the PhD thesis explores two or three more. This is often a practical matter, as sometimes the masters is one step towards the eventual granting of a PhD.