This link has been bookmarked by 154 people . It was first bookmarked on 27 Feb 2009, by Colin Apel.
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Thus an average man—one with 120 friends—generally responds to the postings of only seven of those friends by leaving comments on the posting individual’s photos, status messages or “wall”. An average woman is slightly more sociable, responding to ten. When it comes to two-way communication such as e-mails or chats, the average man interacts with only four people and the average woman with six. Among those Facebook users with 500 friends, these numbers are somewhat higher, but not hugely so. Men leave comments for 17 friends, women for 26. Men communicate with ten, women with 16.
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Humans may be advertising themselves more efficiently. But they still have the same small circles of intimacy as ever.
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16 May 09
Tim WhirledgeDunbar 150 rule. Beyond that we're posting updates to the peripherary
psychology facebook socialnetworking people networks article analytics culture internet research web2.0 twitter community anthropology sociology economist dunbar socialnetworks science networking web socialmedia friends analysis social
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01 May 09
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20 Apr 09
Ryan OuyoumjianBut perhaps additional friends are not free. Primatologists call at least some of the things that happen on social networks “grooming”.
Internet Community Networks social_media twitter facebook social_networking culture
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19 Apr 09
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18 Apr 09
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14 Apr 09
nmcgeeestimates number of "Friends" humans can realistically maintain - relate to online "friend" concept and it's probably higher vis-a-vis danah boyd research.
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13 Apr 09
ucclibraryAn average man—one with 120 friends—generally responds to the postings of only seven of those friends
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31 Mar 09
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27 Mar 09
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Peter MooreCommunities, and online management
facebook social community socialmedia psychology internet twitter science socialnetworking sociology
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25 Mar 09
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Fernando Sánchez Zamoraanalisis sobre el número medio de contactos en redes sociales. numero de Dunbar = 148
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24 Mar 09
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Jonas OlofssonOnce you join and gather your “friends” online, you can share in their lives as recorded by photographs, “status updates” and other titbits, and, with your permission, they can share in yours. Additional friends are free, so why not say the more the merri
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22 Mar 09
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21 Mar 09
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But perhaps additional friends are not free. Primatologists call at least some of the things that happen on social networks “grooming”. In the wild, grooming is time-consuming and here computerisation certainly helps. But keeping track of who to groom—and why—demands quite a bit of mental computation. You need to remember who is allied with, hostile to, or lusts after whom, and act accordingly. Several years ago, therefore, Robin Dunbar, an anthropologist who now works at Oxford University, concluded that the cognitive power of the brain limits the size of the social network that an individual of any given species can develop. Extrapolating from the brain sizes and social networks of apes, Dr Dunbar suggested that the size of the human brain allows stable networks of about 148. Rounded to 150, this has become famous as “the Dunbar number”.
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on these matters. So The Economist asked Cameron Marlow, the “in-house sociologist” at Facebook, to crunch some numbers. Dr Marlow found that the average number of “friends” in a Facebook network is 120, consistent with Dr Dunbar’s hypothesis, and that women tend to have somewhat more than men. But the range is large, and some people have networks numbering more than 500, so the hypothesis cannot yet be regarded as proven.
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Thus an average man—one with 120 friends—generally responds to the postings of only seven of those friends by leaving comments on the posting individual’s photos, status messages or “wall”. An average woman is slightly more sociable, responding to ten. When it comes to two-way communication such as e-mails or chats, the average man interacts with only four people and the average woman with six. Among those Facebook users with 500 friends, these numbers are somewhat higher, but not hugely so. Men leave comments for 17 friends, women for 26. Men communicate with ten, women with 16.
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Pew Internet & American Life Project
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18 Mar 09
Kristina HoeppnerDunbar's number is looked at in social networking sites; conclusion: though one may have many "friends" one only communicates with a select few regularly
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17 Mar 09
nowherefastHow has the rise of social networking tools affected Dunbar's hypothesis...
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16 Mar 09
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Gabriela SellartAnnotated link http://www.diigo.com/bookmark/http%3A%2F%2Fwww.economist.com%2Fscience%2Fdisplaystory.cfm%3Fstory_id%3D13176775%26fsrc%3Drss
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15 Mar 09
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14 Mar 09
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12 Mar 09
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10 Mar 09
magnus christenssonOn Social networks "Humans may be advertising themselves more efficiently. But they still have the same small circles of intimacy as ever."
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Carl Rempelpeople who are members of online social networks are not so much “networking” as they are “broadcasting their lives to an outer tier of acquaintances who aren’t necessarily inside the Dunbar circle,” says Lee Rainie, the director of the Pew Internet & Ame
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John TraversFascinating examination of facebook interactions suggests that people can only manage a quite limited mumber of active 'friends'
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09 Mar 09
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08 Mar 09
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07 Mar 09
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clizzinThe Dunbar number in online social networks?
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06 Mar 09
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Rajan DattaVery interesting study - key points on how many 'friends' we can handle
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Thus an average man—one with 120 friends—generally responds to the postings of only seven of those friends by leaving comments on the posting individual’s photos, status messages or “wall”. An average woman is slightly more sociable, responding to ten. When it comes to two-way communication such as e-mails or chats, the average man interacts with only four people and the average woman with six. Among those Facebook users with 500 friends, these numbers are somewhat higher, but not hugely so. Men leave comments for 17 friends, women for 26. Men communicate with ten, women with 16.
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Abdul Rehman KhawarThus an average man—one with 120 friends—generally responds to the postings of only seven of those friends by leaving comments on the posting individual’s photos, status messages or “wall”. An average woman is slightly more sociable, responding to ten. Wh
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05 Mar 09
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avivajazz jazzavivaWhat is the average number of "friends" in social networks? how many "friends" can someone accommodate comfortably ?
facebook networks socialnetworks socialnetworking relationships webculture socialmedia twitter myspace sociology
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04 Mar 09
Ms. RowleyFrom the Economist 2/26/2009 The author discusses the whether social networks following the "norm" of size (Dunbar # 150). Do people really communicate with all friends or just a small core, similar to social networking.
article community culture facebook socialmedia socialnetworking sociology twitter web2.0
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Aldon HynesInteresting article in the Economist about Dunbar's number and social networks
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Shunt 82Even online, the neocortex is the limit. (Information on a person's number of friends)
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verage man—one with 120 friends—generally responds to the postings of only seven of those friends
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Nico Macdonald[A]dditional friends are not free [in social network spaces]. Primatologists call at least some of the things that happen on social networks “grooming”... Robin Dunbar... concluded that the cognitive power of the brain limits the size of the social networ
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03 Mar 09
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Art GelwicksSeveral years ago, therefore, Robin Dunbar, an anthropologist who now works at Oxford University, concluded that the cognitive power of the brain limits the size of the social network that an individual of any given species can develop. Extrapolating from the brain sizes and social networks of apes, Dr Dunbar suggested that the size of the human brain allows stable networks of about 148. Rounded to 150, this has become famous as “the Dunbar number”.
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02 Mar 09
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Primatologists call at least some of the things that happen on social networks “grooming”.
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the cognitive power of the brain limits the size of the social network that an individual of any given species can develop
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the size of the human brain allows stable networks of about 148. Rounded to 150, this has become famous as “the Dunbar number”
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Many institutions, from neolithic villages to the maniples of the Roman army, seem to be organised around the Dunbar number.
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the average number of “friends” in a Facebook network is 120, consistent with Dr Dunbar’s hypothesis, and that women tend to have somewhat more than men
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even those Facebook users with the most friends communicate only with a relatively small number of them
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Michel BauwensFacebook sociologist analyzes, finds average number of friends in a Facebook network is 120, consistent with Dunbar number
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mediablogiPut differently, people who are members of online social networks are not so much “networking” as they are “broadcasting their lives to an outer tier of acquaintances who aren’t necessarily inside the Dunbar circle,” says Lee Rainie, the director of the P
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01 Mar 09
Chris ChesherStory on social networking, grooming v broadcasting and the Dunbar number.
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Robin Dunbar, an anthropologist who now works at Oxford University, concluded that the cognitive power of the brain limits the size of the social network that an individual of any given species can develop. Extrapolating from the brain sizes and social networks of apes, Dr Dunbar suggested that the size of the human brain allows stable networks of about 148. Rounded to 150, this has become famous as “the Dunbar number”.
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28 Feb 09
Howard RheingoldFacebook sociologist analyzes, finds average number of friends in a Facebook network is 120, consistent with Dunbar number
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THAT Facebook, Twitter and other online social networks will increase the size of human social groups is an obvious hypothesis, given that they reduce a lot of the friction and cost involved in keeping in touch with other people. Once you join and gather your “friends” online, you can share in their lives as recorded by photographs, “status updates” and other titbits, and, with your permission, they can share in yours. Additional friends are free, so why not say the more the merrier?
But perhaps additional friends are not free. Primatologists call at least some of the things that happen on social networks “grooming”.
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Robin Dunbar, an anthropologist who now works at Oxford University, concluded that the cognitive power of the brain limits the size of the social network that an individual of any given species can develop. Extrapolating from the brain sizes and social networks of apes, Dr Dunbar suggested that the size of the human brain allows stable networks of about 148. Rounded to 150, this has become famous as “the Dunbar number”.
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But that does not prove Dr Dunbar’s hypothesis is correct, and other anthropologists, such as Russell Bernard and Peter Killworth, have come up with estimates of almost double the Dunbar number for the upper limit of human groups. Moreover, sociologists also distinguish between a person’s wider network, as described by the Dunbar number or something similar, and his social “core”. Peter Marsden, of Harvard University, found that Americans, even if they socialise a lot, tend to have only a handful of individuals with whom they “can discuss important matters”.
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The Economist asked Cameron Marlow, the “in-house sociologist” at Facebook, to crunch some numbers. Dr Marlow found that the average number of “friends” in a Facebook network is 120, consistent with Dr Dunbar’s hypothesis, and that women tend to have somewhat more than men. But the range is large, and some people have networks numbering more than 500, so the hypothesis cannot yet be regarded as proven.
What also struck Dr Marlow, however, was that the number of people on an individual’s friend list with whom he (or she) frequently interacts is remarkably small and stable. The more “active” or intimate the interaction, the smaller and more stable the group.
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Marc VermutQuick research on actual close group behavior on Facebook
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my serendipities"average number of “friends” in a Facebook network is 120, consistent with Dr Dunbar’s hypothesis ... But the range is large, and some people have networks numbering more than 500 ... What also struck Dr Marlow, however, was that the number of people on a
sociology psychology socialnetworks anthropology internet_sociology
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the size of the human brain allows stable networks of about 148. Rounded to 150, this has become famous as “the Dunbar number”
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Corinne WeisgerberHere's an article on the Dunbar study I mentioned in class. Suggests that despite the potentially huge number of friends on social networking sites, we really only interact with less than 10.
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paul jonesBut perhaps additional friends are not free. Primatologists call at least some of the things that happen on social networks “grooming”. In the wild, grooming is time-consuming and here computerisation certainly helps. But keeping track of who to groom—and
jomc449 social sociology Facebook SocialNetworking ils697 anthropology community culture dunbar economist
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27 Feb 09
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Will RichardsonThe rise of online social networks, with their troves of data, might shed some light on these matters. So The Economist asked Cameron Marlow, the “in-house sociologist” at Facebook, to crunch some numbers. Dr Marlow found that the average number of “frien
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But internet social networking allow easily to build different networks: one for music, one for linux, etc...
So the question is not 150 but how many 150 networks one can manage?
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