How to Manage Over-Assertiveness
medium.dave-bailey.com
medium.dave-bailey.com
Also, for the non-assertive I recommend making it clear that you actually care because that will help to distinguish you from coworkers that aren't participating due to a lack of interest.
As for the question-reflex, I'm not suggesting asking a leading question that assumes your idea... more an open curious question that seeks other points of view.