As I said in What requirements should we have for prior research, I feel having a prior research requirement will help deal with homework type questions as these questions will be more geared to tackling those areas the OP does not understand, rather than the kind of "this is my question, please answer it for me" questions I am seeing a lot lately.
When someone says, for example,
I suspect that a or b will cause c
What makes them suspect that? What have they read to come up with that hypothesis?
Anyone can come up with a hypothesis, but is it based on information they have read or is it purely supposition? If it is supposition, have they tried to confirm it? What did they Google?
With the assertion from @JeromyAngolim that it is needed to ask
Is the question answerable in a scientific way? (e.g., Is the scope of the question appropriate?)
Trying to help moderate questions as a community member, I may have a fair knowledge in Psychology but limited knowledge of the neuroscience behind it. When assessing this question, I would need to know that the hypothesis posed is feasible. Prior research information will help.
I agree with the statement by @StevenJeuris which points out that
although non-expert questions are welcome, we shouldn't allow questions which aren't founded in any way. Even non-expert questions shouldn't be hypothetical. Stating you heard something once, but don't recall when or where doesn't constitute a good question. Non-expert and expert questions alike should show proof there is reason to ask the question.
I feel some questions need to be more based on information found and not just plucked out of the air.
So, what prior research requirements should we set for questions?
Something substantial such as research papers or scientific magazines etc. would be more helpful as they will be more reputable. Maybe you found them via citations in Wikipedia. So, I think that just posting a Wikipedia link or 2 to indicate that you have read something about the subject can be sufficient.
Having said that, although not necessarily needed try to make sure you are provide something that cites their sources of information.
You may have stumbled upon something the answerer didn't know. Even experts learn something new at times.
Putting prior research into your question not only helps identify what you have read and therefore the answerer doesn't need to repeat what you already know, but it also helps others who are learning about the subject to learn what you have learnt.