social software

The real digital divide: knowing how to use what you have & not knowing

From Howard Rheingold’s interview in “Howard Rheingold’s Latest Connection” (Business Week: 11 August 2004):

Here’s where Wikipedia fits in. It used to be if you were a kid in a village in India or a village in northern Canada in the winter, maybe you could get to a place where they have a few books once in a while. Now, if you have a telephone, you can get a free encyclopedia. You have access to the world’s knowledge. Knowing how to use that is a barrier. The divide increasingly is not so much between those who have and those who don’t, but those who know how to use what they have and those who don’t.

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The Pareto Principle & Temperament Dimensions

From David Brooks’ “More Tools For Thinking” (The New York Times: 29 March 2011):

Clay Shirkey nominates the Pareto Principle. We have the idea in our heads that most distributions fall along a bell curve (most people are in the middle). But this is not how the world is organized in sphere after sphere. The top 1 percent of the population control 35 percent of the wealth. The top two percent of Twitter users send 60 percent of the messages. The top 20 percent of workers in any company will produce a disproportionate share of the value. Shirkey points out that these distributions are regarded as anomalies. They are not.

Helen Fisher, the great researcher into love and romance, has a provocative entry on “temperament dimensions.” She writes that we have four broad temperament constellations. One, built around the dopamine system, regulates enthusiasm for risk. A second, structured around the serotonin system, regulates sociability. A third, organized around the prenatal testosterone system, regulates attention to detail and aggressiveness. A fourth, organized around the estrogen and oxytocin systems, regulates empathy and verbal fluency.

This is an interesting schema to explain temperament. It would be interesting to see others in the field evaluate whether this is the best way to organize our thinking about our permanent natures.

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Clay Shirky on the changes to publishing & media

From Parul Sehgal’s “Here Comes Clay Shirky” (Publisher’s Weekly: 21 June 2010):

PW: In April of this year, Wired‘s Kevin Kelly turned a Shirky quote—“Institutions will try to preserve the problem to which they are the solution”—into “the Shirky Principle,” in deference to the simple, yet powerful observation. … Kelly explained, “The Shirky Principle declares that complex solutions, like a company, or an industry, can become so dedicated to the problem they are the solution to, that often they inadvertently perpetuate the problem.”

CS: It is possible to think that the Internet will be a net positive for society while admitting that there are significant downsides—after all, it’s not a revolution if nobody loses.

No one will ever wonder, is there anything amusing for me on the Internet? That is a solved problem. What we should really care about are [the Internet’s] cultural uses.

In Here Comes Everybody I told the story of the Abbot of Sponheim who in 1492 wrote a book saying that if this printing press thing is allowed to expand, what will the scribes do for a living? But it was more important that Europe be literate than for scribes to have a job.

In a world where a book had to be a physical object, charging money was a way to cause more copies to come into circulation. In the digital world, charging money for something is a way to produce fewer copies. There is no way to preserve the status quo and not abandon that value.

Some of it’s the brilliant Upton Sinclair observation: “It’s hard to make a man understand something if his livelihood depends on him not understanding it.” From the laying on of hands of [Italian printer] Aldus Manutius on down, publishing has always been this way. This is a medium where a change to glue-based paperback binding constituted a revolution.

PW: When do you think a similar realization will come to book publishing?

CS: I think someone will make the imprint that bypasses the traditional distribution networks. Right now the big bottleneck is the head buyer at Barnes & Noble. That’s the seawall holding back the flood in publishing. Someone’s going to say, “I can do a business book or a vampire book or a romance novel, whatever, that might sell 60% of the units it would sell if I had full distribution and a multimillion dollar marketing campaign—but I can do it for 1% percent of the cost.” It has already happened a couple of times with specialty books. The moment of tip happens when enough things get joined up to create their own feedback loop, and the feedback loop in publishing changes when someone at Barnes & Noble says: “We can’t afford not to stock this particular book or series from an independent publisher.” It could be on Lulu, or iUniverse, whatever. And, I feel pretty confident saying it’s going to happen in the next five years.

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Refusing a technology defines you

From Sander Duivestein’s “Penny Thoughts on the Technium” (The Technium: 1 December 2009):

I‘m interested in how people personally decide to refuse a technology. I’m interested in that process, because I think that will happen more and more as the number of technologies keep increasing. The only way we can sort our identity is by not using technology. We’re used to be that you define yourself by what you use now. You define yourself by what you don’t use. So I’m interested in that process.

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Ambient awareness & social media

From Clive Thompson’s “Brave New World of Digital Intimacy” (The New York Times Magazine: 5 September 2008):

In essence, Facebook users didn’t think they wanted constant, up-to-the-minute updates on what other people are doing. Yet when they experienced this sort of omnipresent knowledge, they found it intriguing and addictive. Why?

Social scientists have a name for this sort of incessant online contact. They call it “ambient awareness.” It is, they say, very much like being physically near someone and picking up on his mood through the little things he does — body language, sighs, stray comments — out of the corner of your eye. Facebook is no longer alone in offering this sort of interaction online. In the last year, there has been a boom in tools for “microblogging”: posting frequent tiny updates on what you’re doing. The phenomenon is quite different from what we normally think of as blogging, because a blog post is usually a written piece, sometimes quite long: a statement of opinion, a story, an analysis. But these new updates are something different. They’re far shorter, far more frequent and less carefully considered. One of the most popular new tools is Twitter, a Web site and messaging service that allows its two-million-plus users to broadcast to their friends haiku-length updates — limited to 140 characters, as brief as a mobile-phone text message — on what they’re doing. There are other services for reporting where you’re traveling (Dopplr) or for quickly tossing online a stream of the pictures, videos or Web sites you’re looking at (Tumblr). And there are even tools that give your location. When the new iPhone, with built-in tracking, was introduced in July, one million people began using Loopt, a piece of software that automatically tells all your friends exactly where you are.

This is the paradox of ambient awareness. Each little update — each individual bit of social information — is insignificant on its own, even supremely mundane. But taken together, over time, the little snippets coalesce into a surprisingly sophisticated portrait of your friends’ and family members’ lives, like thousands of dots making a pointillist painting. This was never before possible, because in the real world, no friend would bother to call you up and detail the sandwiches she was eating. The ambient information becomes like “a type of E.S.P.,” as Haley described it to me, an invisible dimension floating over everyday life.

“It’s like I can distantly read everyone’s mind,” Haley went on to say. “I love that. I feel like I’m getting to something raw about my friends. It’s like I’ve got this heads-up display for them.” It can also lead to more real-life contact, because when one member of Haley’s group decides to go out to a bar or see a band and Twitters about his plans, the others see it, and some decide to drop by — ad hoc, self-organizing socializing. And when they do socialize face to face, it feels oddly as if they’ve never actually been apart. They don’t need to ask, “So, what have you been up to?” because they already know. Instead, they’ll begin discussing something that one of the friends Twittered that afternoon, as if picking up a conversation in the middle.

You could also regard the growing popularity of online awareness as a reaction to social isolation, the modern American disconnectedness that Robert Putnam explored in his book “Bowling Alone.” The mobile workforce requires people to travel more frequently for work, leaving friends and family behind, and members of the growing army of the self-employed often spend their days in solitude. Ambient intimacy becomes a way to “feel less alone,” as more than one Facebook and Twitter user told me.

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Coppola on changes in the movie industry

From Bloomberg’s “Francis Ford Coppola Sees Cinema World Falling Apart: Interview” (12 October 2009):

“The cinema as we know it is falling apart,” says Francis Ford Coppola.

“It’s a period of incredible change,” says the director of “The Godfather” and “Apocalypse Now.” “We used to think of six, seven big film companies. Every one of them is under great stress now. Probably two or three will go out of business and the others will just make certain kind of films like ‘Harry Potter’ — basically trying to make ‘Star Wars’ over and over again, because it’s a business.”

“Cinema is losing the public’s interest,” says Coppola, “because there is so much it has to compete with to get people’s time.”

The profusion of leisure activities; the availability of movies on copied DVD and on the Internet; and news becoming entertainment are reshaping the industry, he says. Companies have combined businesses as customers turn to cheap downloads rather than visit shops or movie theaters.

“I think the cinema is going to live off into something more related to a live performance in which the filmmaker is there, like the conductor of an opera used to be,” Coppola says. “Cinema can be interactive, every night it can be a little different.”

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Huck Finn caged

From Nicholas Carr’s “Sivilized” (Rough Type: 27 June 2009):

Michael Chabon, in an elegiac essay in the new edition of the New York Review of Books, rues the loss of the “Wilderness of Childhood” – the unparented, unfenced, only partially mapped territory that was once the scene of youth.

Huck Finn, now fully under the thumb of Miss Watson and the Widow Douglas, spends his unscheduled time wandering the fabricated landscapes of World of Warcraft, seeking adventure.

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Al Qaeda’s use of social networking sites

From Brian Prince’s “How Terrorism Touches the ‘Cloud’ at RSA” (eWeek: 23 April 2009):

When it comes to the war on terrorism, not all battles, intelligence gathering and recruitment happen in the street. Some of it occurs in the more elusive world of the Internet, where supporters of terrorist networks build social networking sites to recruit and spread their message.  
Enter Jeff Bardin of Treadstone 71, a former code breaker, Arabic translator and U.S. military officer who has been keeping track of vBulletin-powered sites run by supporters of al Qaeda. There are between 15 and 20 main sites, he said, which are used by terrorist groups for everything from recruitment to the distribution of violent videos of beheadings.

… “One social networking site has over 200,000 participants. …

The videos on the sites are produced online by a company called “As-Sahab Media” (As-Sahab means “the cloud” in English). Once shot, the videos make their way from hideouts to the rest of the world via a system of couriers. Some of them contain images of violence; others exhortations from terrorist leaders. Also on the sites are tools such as versions of “Mujahideen Secrets,” which is used for encryption.

“It’s a pretty solid tool; it’s not so much that the tool is so much different from the new PGP-type [tool], but the fact is they built it from scratch, which shows a very mature software development lifecycle,” he said.

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Interviewed for an article about mis-uses of Twitter

The Saint Louis Beacon published an article on 27 April 2009 titled “Tweets from the jury box aren’t amusing“, about legal “cases across the country where jurors have used cell phones, BlackBerrys and other devices to comment – sometimes minute by minute or second by second on Twitter, for instance – on what they are doing, hearing and seeing during jury duty.” In it, I was quoted as follows:

The small mobile devices so prevalent today can encourage a talkative habit that some people may find hard to break.

“People get so used to doing it all the time,” said Scott Granneman, an adjunct professor of communications and journalism at Washington University. “They don’t stop to think that being on a jury means they should stop. It’s an etiquette thing.”

Moreover, he added, the habit can become so ingrained in some people – even those on juries who are warned repeatedly they should not Tweet or text or talk about they case they are on – that they make excuses.

“It’s habitual,” Granneman said. “They say ‘It’s just my friends and family reading this.’ They don’t know the whole world is following this.

“Anybody can go to any Twitter page. There may be only eight people following you, but anybody can go anyone’s page and anybody can reTweet – forward someone’s page: ‘Oh my God, the defense attorney is so stupid.’ That can go on and on and on.”

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Newspapers are doomed

From Jeff Sigmund’s “Newspaper Web Site Audience Increases More Than Ten Percent In First Quarter To 73.3 Million Visitors” (Newspaper Association of America: 23 April 2009):

Newspaper Web sites attracted more than 73.3 million monthly unique visitors on average (43.6 percent of all Internet users) in the first quarter of 2009, a record number that reflects a 10.5 percent increase over the same period a year ago, according to a custom analysis provided by Nielsen Online for the Newspaper Association of America.

In addition, newspaper Web site visitors generated an average of more than 3.5 billion page views per month throughout the quarter, an increase of 12.8 percent over the same period a year ago (3.1 billion page views).

Contrast that with the article on Craigslist in Wikipedia (1 May 2009):

The site serves over twenty billion page views per month, putting it in 28th place overall among web sites world wide, ninth place overall among web sites in the United States (per Alexa.com on March 27, 2009), to over fifty million unique monthly visitors in the United States alone (per Compete.com on April 7, 2009). As of March 17, 2009 it was ranked 7th on Alexa. With over forty million new classified advertisements each month, Craigslist is the leading classifieds service in any medium. The site receives over one million new job listings each month, making it one of the top job boards in the world.

Even at its best, the entire newspaper industry only gets 1/5 of what Craigslist sees each month.

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Now that the Seattle Post-Intelligencer has switched to the Web …

From William Yardley and Richard Pérez-Peña’s “Seattle Paper Shifts Entirely to the Web” (The New York Times: 16 March 2009):

The P-I, as it is called, will resemble a local Huffington Post more than a traditional newspaper, with a news staff of about 20 people rather than the 165 it had, and a site with mostly commentary, advice and links to other news sites, along with some original reporting.

The new P-I site has recruited some current and former government officials, including a former mayor, a former police chief and the current head of Seattle schools, to write columns, and it will repackage some material from Hearst’s large stable of magazines. It will keep some of the paper’s popular columnists and bloggers and the large number of unpaid local bloggers whose work appears on the site.

Because the newspaper has had no business staff of its own, the new operation plans to hire more than 20 people in areas like ad sales.

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Social software: 5 properties & 3 dynamics

From danah boyd’s “Social Media is Here to Stay… Now What?” at the Microsoft Research Tech Fest, Redmond, Washington (danah: 26 February 2009):

Certain properties are core to social media in a combination that alters how people engage with one another. I want to discuss five properties of social media and three dynamics. These are the crux of what makes the phenomena we’re seeing so different from unmediated phenomena.

A great deal of sociality is about engaging with publics, but we take for granted certain structural aspects of those publics. Certain properties are core to social media in a combination that alters how people engage with one another. I want to discuss five properties of social media and three dynamics. These are the crux of what makes the phenomena we’re seeing so different from unmediated phenomena.

1. Persistence. What you say sticks around. This is great for asynchronicity, not so great when everything you’ve ever said has gone down on your permanent record. …

2. Replicability. You can copy and paste a conversation from one medium to another, adding to the persistent nature of it. This is great for being able to share information, but it is also at the crux of rumor-spreading. Worse: while you can replicate a conversation, it’s much easier to alter what’s been said than to confirm that it’s an accurate portrayal of the original conversation.

3. Searchability. My mother would’ve loved to scream search into the air and figure out where I’d run off with friends. She couldn’t; I’m quite thankful. But with social media, it’s quite easy to track someone down or to find someone as a result of searching for content. Search changes the landscape, making information available at our fingertips. This is great in some circumstances, but when trying to avoid those who hold power over you, it may be less than ideal.

4. Scalability. Social media scales things in new ways. Conversations that were intended for just a friend or two might spiral out of control and scale to the entire school or, if it is especially embarrassing, the whole world. …

5. (de)locatability. With the mobile, you are dislocated from any particular point in space, but at the same time, location-based technologies make location much more relevant. This paradox means that we are simultaneously more and less connected to physical space.

Those five properties are intertwined, but their implications have to do with the ways in which they alter social dynamics. Let’s look at three different dynamics that have been reconfigured as a result of social media.

1. Invisible Audiences. We are used to being able to assess the people around us when we’re speaking. We adjust what we’re saying to account for the audience. Social media introduces all sorts of invisible audiences. There are lurkers who are present at the moment but whom we cannot see, but there are also visitors who access our content at a later date or in a different environment than where we first produced them. As a result, we are having to present ourselves and communicate without fully understanding the potential or actual audience. The potential invisible audiences can be stifling. Of course, there’s plenty of room to put your head in the sand and pretend like those people don’t really exist.

2. Collapsed Contexts. Connected to this is the collapsing of contexts. In choosing what to say when, we account for both the audience and the context more generally. Some behaviors are appropriate in one context but not another, in front of one audience but not others. Social media brings all of these contexts crashing into one another and it’s often difficult to figure out what’s appropriate, let alone what can be understood.

3. Blurring of Public and Private. Finally, there’s the blurring of public and private. These distinctions are normally structured around audience and context with certain places or conversations being “public” or “private.” These distinctions are much harder to manage when you have to contend with the shifts in how the environment is organized.

All of this means that we’re forced to contend with a society in which things are being truly reconfigured. So what does this mean? As we are already starting to see, this creates all new questions about context and privacy, about our relationship to space and to the people around us.

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Kids & adults use social networking sites differently

From danah boyd’s “Social Media is Here to Stay… Now What?” at the Microsoft Research Tech Fest, Redmond, Washington (danah: 26 February 2009):

For American teenagers, social network sites became a social hangout space, not unlike the malls in which I grew up or the dance halls of yesteryears. This was a place to gather with friends from school and church when in-person encounters were not viable. Unlike many adults, teenagers were never really networking. They were socializing in pre-exiting groups.

Social network sites became critically important to them because this was where they sat and gossiped, jockeyed for status, and functioned as digital flaneurs. They used these tools to see and be seen. …

Teen conversations may appear completely irrational, or pointless at best. “Yo, wazzup?” “Not much, how you?” may not seem like much to an outsider, but this is a form of social grooming. It’s a way of checking in, confirming friendships, and negotiating social waters.

Adults have approached Facebook in very different ways. Adults are not hanging out on Facebook. They are more likely to respond to status messages than start a conversation on someone’s wall (unless it’s their birthday of course). Adults aren’t really decorating their profiles or making sure that their About Me’s are up-to-date. Adults, far more than teens, are using Facebook for its intended purpose as a social utility. For example, it is a tool for communicating with the past.

Adults may giggle about having run-ins with mates from high school, but underneath it all, many of them are curious. This isn’t that different than the school reunion. … Teenagers craft quizzes for themselves and their friends. Adults are crafting them to show-off to people from the past and connect the dots between different audiences as a way of coping with the awkwardness of collapsed contexts.

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The importance of network effects to social software

From danah boyd’s “Social Media is Here to Stay… Now What?” at the Microsoft Research Tech Fest, Redmond, Washington (danah: 26 February 2009):

Many who build technology think that a technology’s feature set is the key to its adoption and popularity. With social media, this is often not the case. There are triggers that drive early adopters to a site, but the single most important factor in determining whether or not a person will adopt one of these sites is whether or not it is the place where their friends hangout. In each of these cases, network effects played a significant role in the spread and adoption of the site.

The uptake of social media is quite different than the uptake of non-social technologies. For the most part, you don’t need your friends to use Word to find the tool useful. You do need your friends to use email for it to be useful, but, thanks to properties of that medium, you don’t need them to be using Outlook or Hotmail to write to them. Many of the new genres of social media are walled gardens, requiring your friends to use that exact site to be valuable. This has its advantages for the companies who build it – that’s the whole attitude behind lock-in. But it also has its costs. Consider for example the fact that working class and upper class kids can’t talk to one another if they are on different SNSs.

Friendster didn’t understand network effects. In kicking off users who weren’t conforming to their standards, they pissed off more than those users; they pissed off those users’ friends who were left with little purpose to use the site. The popularity of Friendster unraveled as fast as it picked up, but the company never realized what hit them. All of their metrics were based on number of users. While only a few users deleted their accounts, the impact of those lost accounts was huge. The friends of those who departed slowly stopped using the site. At first, they went from logging in every hour to logging in every day, never affecting the metrics. But as nothing new came in and as the collective interest waned, their attention went elsewhere. Today, Friendster is succeeding because of its popularity in other countries, but in the US, it’s a graveyard of hipsters stuck in 2003.

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MySpace/Facebook history & sociology

From danah boyd’s “Social Media is Here to Stay… Now What?” at the Microsoft Research Tech Fest, Redmond, Washington (danah: 26 February 2009):

Facebook had launched as a Harvard-only site before expanding to other elite institutions before expanding to other 4-year-colleges before expanding to 2-year colleges. It captured the mindshare of college students everywhere. It wasn’t until 2005 that they opened the doors to some companies and high schools. And only in 2006, did they open to all.

Facebook was narrated as the “safe” alternative and, in the 2006-2007 school year, a split amongst American teens occurred. Those college-bound kids from wealthier or upwardly mobile backgrounds flocked to Facebook while teens from urban or less economically privileged backgrounds rejected the transition and opted to stay with MySpace while simultaneously rejecting the fears brought on by American media. Many kids were caught in the middle and opted to use both, but the division that occurred resembles the same “jocks and burnouts” narrative that shaped American schools in the 1980s.

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Defining social media, social software, & Web 2.0

From danah boyd’s “Social Media is Here to Stay… Now What?” at the Microsoft Research Tech Fest, Redmond, Washington (danah: 26 February 2009):

Social media is the latest buzzword in a long line of buzzwords. It is often used to describe the collection of software that enables individuals and communities to gather, communicate, share, and in some cases collaborate or play. In tech circles, social media has replaced the earlier fave “social software.” Academics still tend to prefer terms like “computer-mediated communication” or “computer-supported cooperative work” to describe the practices that emerge from these tools and the old skool academics might even categorize these tools as “groupwork” tools. Social media is driven by another buzzword: “user-generated content” or content that is contributed by participants rather than editors.

… These tools are part of a broader notion of “Web2.0.” Yet-another-buzzword, Web2.0 means different things to different people.

For the technology crowd, Web2.0 was about a shift in development and deployment. Rather than producing a product, testing it, and shipping it to be consumed by an audience that was disconnected from the developer, Web2.0 was about the perpetual beta. This concept makes all of us giggle, but what this means is that, for technologists, Web2.0 was about constantly iterating the technology as people interacted with it and learning from what they were doing. To make this happen, we saw the rise of technologies that supported real-time interactions, user-generated content, remixing and mashups, APIs and open-source software that allowed mass collaboration in the development cycle. …

For the business crowd, Web2.0 can be understood as hope. Web2.0 emerged out of the ashes of the fallen tech bubble and bust. Scars ran deep throughout Silicon Valley and venture capitalists and entrepreneurs wanted to party like it was 1999. Web2.0 brought energy to this forlorn crowd. At first they were skeptical, but slowly they bought in. As a result, we’ve seen a resurgence of startups, venture capitalists, and conferences. At this point, Web2.0 is sometimes referred to as Bubble2.0, but there’s something to say about “hope” even when the VCs start co-opting that term because they want four more years.

For users, Web2.0 was all about reorganizing web-based practices around Friends. For many users, direct communication tools like email and IM were used to communicate with one’s closest and dearest while online communities were tools for connecting with strangers around shared interests. Web2.0 reworked all of that by allowing users to connect in new ways. While many of the tools may have been designed to help people find others, what Web2.0 showed was that people really wanted a way to connect with those that they already knew in new ways. Even tools like MySpace and Facebook which are typically labeled social networkING sites were never really about networking for most users. They were about socializing inside of pre-existing networks.

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Why everyone wants a computer: socializing

From Paul Graham’s “Why TV Lost” (Paul Graham: March 2009):

The somewhat more surprising force was one specific type of innovation: social applications. The average teenage kid has a pretty much infinite capacity for talking to their friends. But they can’t physically be with them all the time. When I was in high school the solution was the telephone. Now it’s social networks, multiplayer games, and various messaging applications. The way you reach them all is through a computer. Which means every teenage kid (a) wants a computer with an Internet connection, (b) has an incentive to figure out how to use it, and (c) spends countless hours in front of it.

This was the most powerful force of all. This was what made everyone want computers. Nerds got computers because they liked them. Then gamers got them to play games on. But it was connecting to other people that got everyone else: that’s what made even grandmas and 14 year old girls want computers.

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The future of TV is the Internet

From Paul Graham’s “Why TV Lost” (Paul Graham: March 2009):

About twenty years ago people noticed computers and TV were on a collision course and started to speculate about what they’d produce when they converged. We now know the answer: computers. It’s clear now that even by using the word “convergence” we were giving TV too much credit. This won’t be convergence so much as replacement. People may still watch things they call “TV shows,” but they’ll watch them mostly on computers.

Whether [TV networks] like it or not, big changes are coming, because the Internet dissolves the two cornerstones of broadcast media: synchronicity and locality. On the Internet, you don’t have to send everyone the same signal, and you don’t have to send it to them from a local source. People will watch what they want when they want it, and group themselves according to whatever shared interest they feel most strongly. Maybe their strongest shared interest will be their physical location, but I’m guessing not. Which means local TV is probably dead. It was an artifact of limitations imposed by old technology.

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Facebook & the Dunbar number

From The Economist‘s “Primates on Facebook” (26 February 2009):

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”.

Many institutions, from neolithic villages to the maniples of the Roman army, seem to be organised around the Dunbar number. Because everybody knows everybody else, such groups can run with a minimum of bureaucracy. 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”. A subsequent study found, to widespread concern, that this number is on a downward trend.

The 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 “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.

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.

What mainly goes up, therefore, is not the core network but the number of casual contacts that people track more passively. …

Put 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 Pew Internet & American Life Project, a polling organisation.

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