By J.C. Duffy, Night Deposits.
Last week, the Facebook Data Team released its social network analysis research, Anatomy of Facebook (on Facebook of course!). They have annotated their algorithms in two academic papers The Anatomy of the Facebook Social Graph and Four Degrees of Separation. Facebook claims their data show that connectivity between people around the world has dramatically increased – so much so that we are only four links away from someone in the most remote part of the world, whether that is a tundra or rainforest. A sociological look at the data dispels this notion. Despite its impressive sample, which includes 721 million active Facebook users and their “69 billion friendships”, Facebook’s findings replicate widely-held sociological knowledge about the way people form social ties. Nonetheless, Facebook’s data has great potential to address important social questions, if we can just set aside those pesky social science concerns about research ethics, informed consent and privacy…
Facebook’s study has an extraordinary sample of ‘active users’ representing one tenth of the world’s population The term active user is defined by Johan Ugander and colleagues in one of the aforementioned academic papers. This refers to someone with at least one friend who had logged on once in the past 28 days from the study’s commencement in May 2011. This is less frequent than the Facebook’s company definition of an active user, but the divergent definitions are not explained. For the record, Facebook currently reports it has 800 million active users and 50 percent of them log in at least once a day. Lars Backstrom, computer scientist and one of the Facebook Data Team’s lead researchers in this study, reports on the aims and key findings. The Team found that only around 10 percent of active users have less than 10 friends, while half have a median of 100 friends (the average is 190 friends). See below for more detail.