Google focus group size. They say 8 to 10 is ideal
It’s probably my original perspective that’s still giving me a skewed slant on
this even now.
It isn’t looking to reveal a consensus across a group. It’s looking at a group
that has one, to see why they formed their opinion.
For participation it seems like 10 would be better than 19, but for variety of perspectives (reasons why) it would seem 20 would be better.
Thanks for the mention.