Seeing whether tiny functions increase productivity or medium sized functions with comment headers would be my one. It would be very interesting to see how this relates especially to issues closed and new features added as opposed to "Code Quality" and number of lines.
A lot of styles are opinions without large scale real data behind it, so if you could run a large study what would you want to find out?
A lot of styles are opinions without large scale real data behind it, so if you could run a large study what would you want to find out?