What property makes collective informational processes more accurate? In iconic memory results seem to say that we need a modest goal-setting to accomplish a good standard. This means when we try to process like nine symbols we will fail for about half of the possible result. There is as such still half that stays correct after all, and it sound pretty normal when people make different recall choices they middle each other out in the end. But this isn't so when some logic can applied that doesn't really stands in function of making realistic estimations. It seems that this only could play when consciousness plays an important role (some property makes it more simple grounded). The theory of Sense-Data seems not that valid after all. Although this process can maybe become valid through the use of consciousness. Why would that be so?
Of course consciousness is a higher process, and it is important for executive functioning. Which holds an important array of information in picking up information from experience. Experience deals with intelligence in the highest extend. In this we use calculation in free form, and some people tend to make different mistakes than others. This doesn't give me really an explanation why group cognition would be more accurate.
Maybe it lies in the nature of reality itself. Reality is itself active then. Probably there are also certain classes that are more basic than others, which means, the mean development will make a difference in the group, and even become better than the best developed individual members. Maybe it could be just described as an independent process apart from individual psychology. It is defined on the result of the group, not the individuals. Even if diversity is itself an individual characteristic. This would be a good point, which makes the psychological explanation difficult to explain but easy to describe.