As a follow-up to this question, I would like to know if the following proposal would be helpful to reduce low-quality first-time contributions.
Duplicate disclaimer. While writing this question, I saw this other question that has a similar content. If you think that this is more of a duplicate than original content, I can migrate this as an answer in that thread. To be noticed that the discussion in that thread - even though the number of upvotes is good - has been abandoned. (I would like it to be continued, either here or there).
I am aware that effort has been already put into this issue in the past.
Format. I personally like the advice page and I think that all the information therein contained is important. However, as already pointed out, a non-irrelevant amount of new users completely ignore many of the points listed. What if (a shorter version of) that page was instead shown, as a checklist with a tick for each point? I am particularly thinking about turning the small three-point list on top into something like:
[ ] - I formatted the formulas using MathJax [ ] - I chose a title that is specific and summarizes my question [ ] - I described in detail what I know and what I didn't understand
Even though there are many points that need to be covered to make a good-quality entry, I would narrow this short-list to 3-5 elements that can be used as a guide to avoid very low-quality answers.
Timing. I would show this short-list right above the Post Your Question button or as an interactive pop-up (or similar) that is activated when pressing the button.
As a (relatively) young contributor, I might have an unclear idea of how this issue is perceived by more substantial contributors. Anyway, given the high volume of questions asked by new contributors each day, I believe that it is important to set the right conditions for them to ask a good first question.