According to Dunbar's research about the size of human social groups, which of the following directly influences how many people the average human can keep track of or know reasonably well?

Question

Quizplus · Accepted Answer

Dunbar's research suggests that the size of human social groups is directly related to the size of the neocortex in the brain. Therefore, choice D - the size of the human cortex - is the best answer. Choices A, B, and C are not supported by Dunbar's research.

According to Dunbar's Research About the Size of Human Social