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noitacudeDunbar's number is a suggested cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is and how each person relates to every other person.[1][2][3][4][5][6] This number was first proposed in the 1990s by British anthropologist Robin Dunbar, who found a correlation between primate brain size and average social group size.[7] By using the average human brain size and extrapolating from the results of primates, he proposed that humans can only comfortably maintain 150 stable relationships.[8] Proponents assert that numbers larger than this generally require more restrictive rules, laws, and enforced norms to maintain a stable, cohesive group. It has been proposed to lie between 100 and 250, with a commonly used value of 150.[9][10] Dunbar's number states the number of people one knows and keeps social contact with, and it does not include the number of people known personally with a ceased social relationship, nor people just generally known with a lack of persistent social relationship, a number which might be much higher and likely depends on long-term memory size.
research science behavior primate primatology number monkeysphere human social theory network sociology psychology community
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By using the average human brain size and extrapolating from the results of primates, he proposed that humans can only comfortably maintain 150 stable relationships.
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Dunbar's number was first proposed by British anthropologist Robin Dunbar, who theorized that "this limit is a direct function of relative neocortex size, and that this in turn limits group size ... the limit imposed by neocortical processing capacity is simply on the number of individuals with whom a stable inter-personal relationship can be maintained." On the periphery, the number also includes past colleagues such as high school friends with whom a person would want to reacquaint oneself if they met again
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The number of social group members a primate can track appears to be limited by the volume of the neocortex.
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Dunbar predicted a human "mean group size" of 148 (casually rounded to 150)
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a result he considered exploratory due to the large error measur
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150 as the estimated size of a Neolithic farming village;
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200 as the upper bound on the number of academics in a discipline's sub-specialization;
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150 as the basic unit size of professional armies
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notions of appropriate company size
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only for communities with a very high incentive to remain together.
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For a group of this size to remain cohesive, Dunbar speculated that as much as 42% of the group's time would have to be devoted to social grooming
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such groups are almost always physically close:
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occur only because of absolute necessity—due to intense environmental and economic pressures.
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Dunbar's number is a suggested cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1] Proponents assert that numbers larger than this generally require more restrictive rules, laws, and enforced norms to maintain a stable, cohesive group. No precise value has been proposed for Dunbar's number. It has been proposed to lie between 100 and 230, with a commonly used value of 150.[2][3] Dunbar's number states the number of people one knows and keeps social contact with, and it does not include the number of people known personally with a ceased social relationship, nor people just generally known with a lack of persistent social relationship, a number which might be much higher and likely depends on long-term memory size.
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"this limit is a direct function of relative neocortex size, and that this in turn limits group size ... the limit imposed by neocortical processing capacity is simply on the number of individuals with whom a stable inter-personal relationship can be maintained." On the periphery, the number also includes past colleagues such as high school friends with whom a person would want to reacquaint oneself if they met again.[4]
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Donald LuckHow many relationships can any person maintain? Dunbar's number.
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theoretical cognitive limit to the number of people with whom one can maintain stable social relationships.
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more restrictive rules, laws, and enforced norms
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not include
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number of individuals with whom a stable inter-personal relationship can be maintained
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species-specific index of the social group size
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(casually rounded to 150)
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200 as the upper bound on the number of academics in a discipline's sub-specialization;
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150 would be the mean group size only for communities with a very high incentive to remain together
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under intense survival pressure
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42% of the group's time would have to be devoted to social grooming
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In dispersed societies, individuals will meet less often and will thus be less familiar with each, so group sizes should be smaller in consequence."
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Language may have allowed societies to remain cohesive, while reducing the need for physical and social intimacy
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social networks their software needs to take into account;
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an estimated mean number of ties, 290, that is roughly double Dunbar's estimate
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231 is lower, due to upward straggle in the distribution
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The Bernard–Killworth estimate of the maximum likelihood of the size of a person's social network is based on a number of field studies using different methods in various populations. It is not an average of study averages but a repeated finding
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dynamics of social groups.
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Dunbar himself is doing a study on Facebook to be released in 201
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10 Apr 11
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a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships
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al knows who each person is, and how each person relates to every other person
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knows and keeps social contact with
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between 100 and 230, with a commonly used value of 150
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relative neocortex size
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protective cliques
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05 Mar 11
ronald fullerDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1] Proponents assert that numbers larger than this generally require more restrictive rules, laws, and enforced norms to maintain a stable, cohesive group. No precise value has been proposed for Dunbar's number. It has been proposed to lie between 100 and 230, with a commonly used value of 150.[2] Dunbar's number states the number of people one knows and keeps social contact with, and it does not include the number of people known personally with a ceased social relationship, which such a number might be much more numerous and likely depends on memory size.
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sumeetmogheDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1]
psychology social socialmedia statistics socialnetworking community
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Joan WeytzeSee the article on the Hutterites re the size of their colonies.
Dunbar's Number relationships cognition group sociology anthropology Robin Dunbar applications populations monkeysphere networking
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Joyce SeitzingerDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1]
robindunbar socialnetworking socialmedia wikipedia statistics networks joyce_phd research society
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Stephen DaleDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1]
socialmedia socialnetworking community wikipedia reference psychology
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Sean ReevesDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1]
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Jem Fleming"..a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person. Proponents assert
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Randy Ziegenfuss"Dunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships"
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Kami HuyseDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1]
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infora dimeDunbar's number is a theoretical cognitive limit to the number
of people with whom one can maintain stable social relationships. These
are relationships in which an individual knows who each person is, and
how each person relates to every other persscience psychology evolution sociology community monkeysphere
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14 Dec 09
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Simon Reavelywhat is the maximum number of people you can maintain meaningful relationships with
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Kamran RazvanResearch on the social aspect of fundraising.
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Juan Rafael Fernández«Dunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. Proponents assert that numbers larger than this generally require more restricted rules, laws, and enforced norms to maintain a stable, cohesive group.»
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14 Jun 09
Mare BVDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1]
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Matt MontagneDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. T
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11 Apr 09
arcojediDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1] Proponents assert that numbers larger than this generally require more restricted rules, laws, and enforced norms to maintain a stable, cohesive group. No precise value has been proposed for Dunbar's number, but a commonly cited approximation is 150.
Dunbar's number was first proposed by British anthropologist Robin Dunbar, who theorized that "this limit is a direct function of relative neocortex size, and that this in turn limits group size ... the limit imposed by neocortical processing capacity is simply on the number of individuals with whom a stable inter-personal relationship can be maintained." On the periphery, the number also includes past colleagues such as high school friends with whom a person would want to reacquaint the -
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Ludwig Gatzke"Dunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person."
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adelgadobDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person
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josephhsutheoretical cognitive limit to the number of people with whom one can maintain stable social relationships
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17 Feb 09
Aloha Lavina150 ppl from case study cited in Gladwell's Outliers. 3M makes new plants if they have over 150 in one plant.
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Eric JacklichHow many stable relationships one person can maintain. It's 150.
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29 Dec 08
Luis OopshDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1]
i-g basic rebasic idsh crish post urg ecocris a-g a-gestion commonmanag commoncrish economiasocial
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Daniel LemireDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships.
Mathematics network socialsoftware wikipedia socialnetworking socialmedia networking
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26 Nov 08
Max KaehnDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person. Pr
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Lynne JonesDunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each person is, and how each person relates to every other person.[1]
wikipedia statistics socialsoftware socialmedia reference psychology Dunbar's_number
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limit to the number of individuals with whom any one person can maintain stable social relationships:
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arguments about the dynamics of social groups.
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29 Sep 08
Dunbar's number is the supposed cognitive limit to the number of individuals with whom any one person can maintain stable social relationships: the kind of relationships that go with knowing who each person is and how each person relates socially to every
Science Psychology social community Statistics Network Evolution biology mathematics networking sociology
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