Correct

At the naturalistic level of research, the problem statements
can be quite vague. I suppose it could be argued that at any
level the statement of the problem ought to be refined as
much as possible, appropriate for that level of research. So
there you are; the answer to that item can be either True or False!
This may be a good time to remind you that a good scientist has to be
able to tolerate ambiguity. But in this case, false is probably more
correct in that it is more critical to refine problem statements
the higher the constraint level.