I have pointed out numerous times that group behavior, whether ethnic or otherwise, is gestaltian. It is organic. It can not be reduced to the sum of the individual members’ behaviors or talents. Generally, I am suspicious of people who try to reduce group behavior to individual factors; they’re either idiots or conmen, trying to cover up their own rampant social networking and well defended social cohesion.
Regardless, yet more evidence of the gestaltian aspect of groups.
Psychologists have repeatedly shown that a single statistical factor—often called “general intelligence”— emerges from the correlations among people’s performance on a wide variety of cognitive tasks. But no one has systematically examined whether a similar kind of “collective intelligence” exists for groups of people. In two studies with 699 individuals, working in groups of two to five, we find converging evidence of a general collective intelligence factor that explains a group’s performance on a wide variety of tasks. This “c factor” is not strongly correlated with the average or maximum individual intelligence of group members but is correlated with the average social sensitivity of group members, the equality in distribution of conversational turn-taking, and the proportion of females in the group
It should be noted that groups do, in fact, have a g-factor, as seen in the case of the G-factor of nations. But there are also other factors, the c-factor — presumably related to social capital — being just one.