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Human Brain Limit of '150 Friends' Doesn't Check Out, New Study Claims - ScienceAlert

Human Brain Limit of '150 Friends' Doesn't Check Out, New Study Claims - ScienceAlert

Human Brain Limit of '150 Friends' Doesn't Check Out, New Study Claims - ScienceAlert
May 05, 2021 42 secs

Dunbar's number was originally predicated on the idea that the volume of the neocortex in primate brains functions as a constraint on the size of the social groups they circulate amongst.

While a number of studies have offered support for Dunbar's ideas, the new study debunks the claim that neocortex size in primates is equally pertinent to human socialization parameters.

Despite the mainstream attention Dunbar's number enjoys, the researchers say the majority of primate social evolution research focuses on socio-ecological factors, including foraging and predation, infanticide, and sexual selection – not so much calculations dependent on brain or neocortex volume.

Further, the researchers argue that Dunbar's number ignores other significant differences in brain physiology between human and non-human primate brains – including that humans develop cultural mechanisms and social structures that can counter socially limiting cognitive factors that might otherwise apply to non-human primates

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