@evan Just as @johannab said, it doesn't (for me) depend on how many people are in the meeting.
If it's not something I need to pay attention to then (a) it shouldn't really include me, but often that's not for me to decide, and (b) I'm multi tasking.
If it's something I need to pay attention to, I will.
Doesn't have anything to do with number of people in the meeting, AFAICT.