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ARTICLES The Social Brain Hypothesis Robin I.M

Social Brain Theory, Robin Dunbar | Psychology Concepts

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Simulating The Social Brain Hypothesis | …

As , the 150 relationships is made up of layers, with our closest relationship layer containing the fewest people. Dunbar and his colleagues have suggested that there are four layers, cumulatively containing 5, 15, 50 and 150 people, with the 150 being the total number of relationships. This means we have five close relationships in the first layer, and with every layer after that the number of relationships increases, but their intensity decreases, as shown in the following diagram.

Simulating The Social Brain Hypothesis

In a , three researchers including Robin Dunbar analyse mobile phone data to see if layers of friends can be identified from call frequencies, and how call frequency clusters compare with the layer sizes predicted by the social brain hypothesis. Different algorithms were used to break the call frequencies into clusters.

Social intelligence hypothesis | Psychology Wiki | …

Dunbar’s social brain hypothesis proposes that we each have four relationship layers, cumulatively containing 5, 15, 50 and 150 people.

The concensus view has tradition-ally been that brains evolved to pro-cess information of ecological rel-evance. This view, however, ignores an important consideration: Brains are exceedingly expensive both to evolve and to maintain. The adult human brain weighs about 2 % of body weight but consumes about 20 % of total en-ergy intake.2 In the light of this, it is difficult to justify the claim that pri-mates, and especially humans, need larger brains than other species merely to do the same ecological job. Claims that primate ecological strategies in-volve more complex problem-solv-ing3,4 are plausible when applied to the behaviors of particular species, such as termite-extraction by chimpan-zees and nut-cracking by Cebus mon-keys, but fail to explain why all primates, including those that are con-ventional folivores, require larger brains than those of all other mammals. An alternative hypothesis offered during the late 1980s was that pri-mates ’ large brains reflect the compu-tational demands of the complex so-cial systems that characterize the order.5,6 Prima facie, this suggestion seems plausible: There is ample evi-dence that primate social systems are more complex than those of other species. These systems can be shown to involve processes such as tactical deception5 and coalition-formation,7,8 which are rare or occur only in sim-pler forms in other taxonomic groups. Because of this, the suggestion was rapidly dubbed the Machiavellian intel-ligence hypothesis, although there is a growing preference to call it the social brain hypothesis.9,10 Plausible as it seems, the social brain hypothesis faced a problem that was recognized at an early date. Specifi-cally, what quantitative empirical evi-dence there was tended to favor one or the other of the ecological hypoth-eses,1 whereas the evidence adduced in favor of the social brain hypothesis was, at best, anecdotal.6 In this article, I shall first show how we can test between the competing hypotheses more conclusively and then consider some of the implications of the social brain hypothesis for humans. Finally, I shall briefly consider some of the underlying cognitive mechanisms that might be involved.

These factors associated with the psychological effects of sleep apnea can be controlled to a certain degree and improve the outcome people have while living with this condition.

The Social Brain Hypothesis: Are our brains hardwired …

24/04/2008 · The Social Brain Hypothesis: Are our brains hardwired to deal ..

The suggests that there is a characteristic size for human social networks. This is , and called “” after social brain hypothesis researcher , Professor of Evolutionary Psychology at University of Oxford.

The Social Brain Hypothesis by A J, Jones - issuu
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