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Dunbar's number: social capital v. social signal


"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.[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, via wikipedia

I've been reading some interesting things lately (here and here) about Dunbar's number as it applies to social networking sites. Essentially, the number breaks down like this for social networking profiles (via Read Write Web):

"According to Cameron Marlow, Facebook's "in-house sociologist," that number is four if you are male and six if you are female. As the Economist reports this morning, Marlow's research indicates that the average Facebook user has a network of about 120 friends, but only has two-way conversations with a very small subset of these 'friends.' Interestingly, even for those users who have a far larger number of friends (500+), those numbers barely grow (ten for men and sixteen for women)."

While Marlow's assessment relates directly to FB, which is quite unlike Twitter, the general conclusion is interesting. Namely, that there are only so many people we can reasonably and thoughtfully engage given the fixed capacity of the human OS and available relationship RAM.

Mindless following: social capital

This leads me to ask, as others have, why we are following so very many people in services like Twitter when the reality of our attention is so limited. Author and social reseacher Mary Hodder cites the following example (in a comment from my post about protected updates):

"The other day I had a woman lash out at me on twitter for not following back everyone who follows me. She followed 6k people and I pointed out that there was no way she could read all those people all the time. I actually wanted a list of people I could reasonably follow. In other words we all have our own way of doing it, and while people may be judgmental, I was not judgmental of her for giving those she follows a false sense that she actually reads all their stuff."


As Mary points out, its one thing to follow 6K people, but quite another to engage that many people on any level beyond a fleeting @, which may only function as a token of social capital for those seeking micro-status or connection with high profile figures online (as so many of these SEO-social media marketers suggest newcomers to do ...). Mary, like me, wants to use this tool to engage signal, rather than gaming it for social capital.

A couple of other things struck me about the import of Mary's comment. First, the fact that anyone would admonish her for "not following back" and second, that this person would deign to tell a social theorist her job. While I don't object to challenging authorities on their ideas, I do object to empowered ignorance (i.e., critiqueing somebody's ideas without having any meaningful knowledge of the origins or contexts of that person's prior knowledge or work). Which leads me to my final point.

Connecting with a person without prior social knowledge, history, context or capital is only part of the problem with the impulsivity of following on social networks.Many people, for example, quickly add anyone with a high profile for no other reason than that that person has a high profile -- without engaging - on even the most superficial level - that expert's body of ideas or context. I see thousands of people follow, for example, danah boyd - many of whom have likely not so much as read a single post in danah's blog or research papers. Ironically, danah rarely posts much at all on Twitter, which seems a bit of the punchline to the joke of following authorities without reason (i.e., if she's not posting about her work, why are you following?). Which is why I follow danah as a symbolic gesture of my respect for her work, which I've been reading and engaging since 2003.

The mindless following seems to be based on one thing and one thing only: A game of social capital, not genuine connection or "relating."

My (Twitter) identity: Yours to discover (or invent)

That we cannot expect every new connection to take a moment and click on our website or read our about page is what I'm getting at. That some people are willing to connect without making so much as a momentary investment in context is a really questionable expression of "connection." If you're communicating with a person on a daily without doing so much as a rudimentary exploration of their identity (even a visit to their site) you are properly connecting with an *idea* not a person. A fictional character built on your own subjective guesswork, misreadings and convenient assumption. Our resulting relationship, in that context, is highly propblematic. Particularly when people start describing this relationship as "knowing" someone. We can certainly "get to know" someone but doing so requires actual effort on the part of both parties. Which leads me to my final thoughts.

Mindful following: social signal

While I myself continue to make connection with new people and add new people to my network based largely on the promise of a meaningful connection or shared interests, I also see the opportunities to mindfully engage these people decreasing with every new follow I add. While I certainly increase the "variety" of the tweets I'm viewing, I'm also creating more and more distance between myself and the handful of people whose tweets I might follow as more of a cohesive or narrative self expression. Instead, I get only a fleeting blip on the social radar of every person I have come into contact with on the service. As these blips increase so, too, does the noise. Imagine yourself at a giant coctail party catching only snippets of conversations - totally decontextualised from the speakers and their larger narratives. Misreadings, among other things, would arise with greater frequency due to the lack of context for what is being shared (and with whom).

I'm still wrestling with the issue of how many people I can meaningfully follow. For now, I'm discovering that of the close to 300 people I follow, only a handful post with any regularity. So the Dunbar number is also influenced - highly - by participation metrics. I can safely say that I'm not going to reach that number any time soon based on the volume of my follows who actively participate. But I will likely make a decision at the point at which I can no longer keep up and likely write about that when it occurs.

This is my speculative conclusion at this moment. I don't see it as a permanent position I desire to prove or reinforce but a considered perspective that may change in time. And I'm fully ready and interested in developing these thoughts with the help and insight of others - also engaged in similar questions.

Your take?


No doubt, you have a lot of opinions about all of the above - including your own insights and questions. Please take a moment and share them below. I'm interested in knowin the following:

1) What do you think about Mary's comment about following 6K people and what this says about your approach to engagement?
2) How many people do you currently follow and how would you characterise your Dunbar number?
3) How much of an effort are you willing to make when choosing to follow somebody? Do you visit their links? Read through their recent tweets, explore their friends lists? Are trust metrics a meaningful part of that choice?








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Comments (4)

Mar 12, 2009
Dean Shareski said...
I've been grappling with this issue for a while. The problem with the number of course is that it is very difficult to take the number of followers, RSS feeds, Facebook friends and use that as any sort of indicator since, as you state, so many are fairly non-participatory.

I tend to start big and allow relationships to evolve. I have a hard time dropping relationships although some drop because of inactivity. What is critical and difficult is the ability to add more diverse voices. That's tougher.

Mar 12, 2009
Hadass said...
Very interesting thoughts! When someone follows me, I definitely go and look at their Twitter page. If the person is an educator, I add them immediately, because I am interested in connecting, at one level or another, with as many educators as I can. If they are not, then I go on to look at their tweets, and often end up blocking obvious spam.

I usually go visit the blog, etc., *after* the person has posted something that interests me.

I follow just under 100 people, and I don't expect the number to grow hugely. But then, I don't have hundreds of FB friends, either - just people that I know from somewhere, RL or other online fora or even from Twitter.

Thanks so much for the invitation to think about this!

Mar 12, 2009
Melanie McBride said...
Dean, starting big and letting the relationships evolve is also a good model - the "pruning" model. We can get to know what we like, don't like, to engage. Then reduce and distill. Ultimately, I tend to find the people I follow over time - usually via references in the feeds of people I like and respect. Often, if I see somebody's name come up enough among the people I'm following it's enough to inspire me to follow. Though I also find people quite by accident - or if they follow me and I see a good reason to connect I do.
Mar 26, 2009
 said...
Wow. I'm happy to read your interesting thoughts here. My take is very different. I don't think that Dunbar's number really has much relevance in twitter. Maybe in facebook, yes, but far less so in twitter.

I believe that twitter's asymetical follower/following model is allowing people to tune into information streams that they believe are influential and interesting. It's more about the information than it is about people.

Follower / Following is a much more like a neural connection, with incoming and outgoing connections. You filter the incoming memes and then fire off the ones that are interesting enough (to you) to pass along.

Here are some more thoughts on the topic.
http://www.robvio.us/twitter-is-a-giant-brain

Regarding the comment of "not following back", I think that is a quirk of human interaction that spammers are using to their advantage. Take a look at this, for example:
http://blog.spywareguide.com/2009/03/the-life-and-death-of-a-twitte.html

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