I did my undergraduate degree in Psychology 25 years ago. I am presently completeing a taught Masters degree in another subject area. I have been thinking about going back to my first love and pursuing a PhD in Psychology.
Here's my question. Since I am pretty rusty by now on stats etc, should I do an MRes first or just go straight for the PhD?
Since you are already back on the academic bandwagon with masters degree, then you may as well go straight to the PhD, and as mentioned above, do courses as you research.
It would be just the same with the Mres - you'd still need a course in stats. When you start your PhD there should be some relevant course(s) you can attend even if they are in another dept.