How many friends fits in your head?

How many social connections do you have? 

On LinkedIn? Facebook? Xing? Google+? 

And how about your connections in real life?

British antropologist dr. Robin Dunbar calculates the average social group size, based on the size of the neocortex (part of your brain ;)). Dunbar used the correlation observed for non-human primates to predict a social group size for humans. Dunbar predicted a human “mean group size” of 148 (casually rounded to 150).

Implications are immense, both in work as private lives. Staying connected with all of thes 150 people will take (according to Dunbar) 42% of your time for social grooming.

So think again about how many social connections you really have? The rest are just bystanders watching part of your life or work.

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