A. For many hundreds of thousands of people worldwide, online networking has become enmeshed in our daily lives. However, it if a decades-old insight from a study of traditional social networks that best illuminates one of the most important aspects of today’s online networking. In 1973 sociologist Mark Granovetter showed how the loose acquaintances, or weak ties5, in our social network exert a disproportionate influence over our behaviour and choices. Granovetter’s research showed that a significant percentage of people get their jobs as a result of recommendations or advice provided by a weak tie. Today our number of weak-tie contacts has exploded via online social networking. ‘You couldn’t maintain all of those weak ties on your own, says Jennifer Golbeck of the University of Maryland, Online sites, such as Facebook, give you a way of cataloguing them.’ The result? It’s now significantly easier for the schoolfriend you haven’t seen in years to pass you a tip that alters your behaviour, from recommendation of a low-chölesterol breakfast cereal to a party invite where you meet your future wife or husband.

B. The explosion of weak ties could have profound consequences for our social structures too, according to Judith Donath of the Berkman Genter for Internet and Society at Harvard University. ‘We’re already seeing changes, she says. For example, many people now turn to their online social networks ahead of sources such as newspapers and television for trusted and relevant news or information. What they hear could well be inaccurate, but the change is happening nonetheless. If these huge ‘supernets* – some of them numbering up to 5, 000 people – continue to thrive and grow, they could fundamentally change the way we share information and transform our notions of relationships.

C. But are these vast networks really that relevant to us on a personal level? Robin Dunbar, an evolutionary anthropologist at the University of Oxford, believes that our primate brains place a cap on the number of genute social relationships we can actually cope with: roughly 150. According to Dunbar, online social networking appears to be very good for ‘servicing relationships, but not for establishing them. He argues that our evolutionary roots mean we still depend heavily on physical and face-to-face contact to be able to create ties.

D. Nonetheless, there is evidence that online networking can transform our daily interactions. In an experiment at Cornell University, psychologist Jeff Hancock asked participants to try to encourage other participants to like them via instant messaging conversation. Beforehand, some members of the trial were allowed to view the Facebook profile of the person they were trying to win over. He found that those with Facebook access asked questions to wich they already knew the answers or raised things they had in common, and as result were much more successful in their social relationships. Hancock concluded that people who use these sites to keep updated on the activities of their acquaintances are more likely to be liked in subsequent social interactions.

E. Online social networking may also have tangible effects on our well-being. Nicole Ellison of Michigan State University found that the frequency of networking site use correlates with greater self- esteem. Support and affirmation from the weak ties could be the explanation, says Ellison. ‘Asking your close friends for help or advice is nothing new, but we are seeing a lowering of barriers among acquaintances, ‘ she says. People are readily sharing personal feelings and experiences to a wider circle than they might once have done. Sandy Pentland at tie Massachusetts Institute of Technology agrees. The ability to broadcast to our social group means we need never feel alone/ he says. The things that befall us are often due to a lack of social support. There’s more of a safety net now

F. Henry Holman, also at MIT, who studies the interface between online social networking and the real world, points out that increased visibility also means our various social spheres – family, work, friends – are merging, and so we will have to prepare for new societal norms. ‘We’ll have to learn how to live a more transparent life, he says. We may have to give up some ability to show very limited glimpses of ourselves to others.’

G. Another way that online networking appears to be changing our social structures is through dominance. In one repeated experiment, Michael Kearns of the University of Pennsylvania asked 30 volunteers to quickly reach consensus in an online game over a choice between two colours. Each person was offered a cash reward if they succeeded in persuading the group to pick one or other colour. All participants could see the colour chosen by some of the other people, but certain participants had an extra advantage: the ability to see more of the participants chosen colours than others. Every time Kearns found that those who could see the choices of more participants (in other words, were better connected) persuaded the group to pick their colour, even when they had to persuade the vast majority to give up their financial incentive. While Kearns warns that the setting was artificial, he says it’s possible that greater persuasive power could lie with well-connected individuals in the everyday online world too.