How can I set Moodle to grade missed questions with a zero? so that a student who hasn't answered the question gets a lower grade as a result?
any ideas? I've searched high and low.
As the student's grade for the forum is based on ratings and not posts I'm not sure how to do this. Especially as you're wanting to influence their grade based on them not posting so we'd need to detect you posting then them NOT posting.
What if you will use not the aggregation to determine category total, but set up a calculation instead for it?
Go to Categories and Items interface and click grey calculator icon near the category total.
The formula can be something this: =sum(||forum1||,||forum2||)
replace || with square brackets, of course