Foreground speakers' Eye contact, Gestures, within-touching/smelling/hearing Proximities indicate high involvement. Interchange is affecting their cognitive states. Ongoing communication will affect ongoing behavior dynamically.
Farther away, observers are more withdrawn (crossed arms, weight on heels). Not only their experiences (history, attitudes) and role, but sense data lead to different perspectives on the content of the communication.
For bridging REMOTE communication HumanML is a support tool to fill in traditional interpretive info.