Instilling Constructive Participation: 15-minute Soliloquy
Another complementary possibility (besides the Six Thinking Hats) to instill constructive participation is to allow each member of the group on separate days to lead the discussion in the form of a fifteen minute soliloquy
about a related subject.
Fifteen uninterrupted minutes of espousal time is enough to help each person gain confidence toward being more participatory, since the meeting platform and workplace milieu is more efficient when it provides validation of likes and dislikes while requiring all members to be prepared to speak intelligently.
It also helps countervailers consider opposing viewpoints more carefully; while ensuring that the day's orator supports one's opinion/observation with facts. The model is tried and true!