I do talk about the social limits of time and how they relate to the Dunbar Number in my article Dunbar Triage: Too Many Connections (http://www.lifewithalacrity.com/2005/02/dunbar_triage_t.html).
However, I do feel that some of the Worlds of Warcraft and Ultima Online group data that post in my later blog articles on the Dunbar Number do show that there does some to some interesting thresholds of group size that are based on some human limitation. It may not be a cognitive limit, it may be just what we socially accept as the minimum amount of time to have a meaninful interaction, but these thresholds do seem to emperically exist.
Dunbar Triage
However, I do feel that some of the Worlds of Warcraft and Ultima Online group data that post in my later blog articles on the Dunbar Number do show that there does some to some interesting thresholds of group size that are based on some human limitation. It may not be a cognitive limit, it may be just what we socially accept as the minimum amount of time to have a meaninful interaction, but these thresholds do seem to emperically exist.