The mood system
One of the aspects that seperates LiveJournal from more formal blogs is it's focus on personal disposition. To augment this individual focus, LiveJournal has a "mood" system; every entry can be attached with a prefabricated emotion (from a pull-down list), or users can describe their mood in their own words. It looks like this:
As you might imagine, the mood system is a popular feature.
Enter MoodViews.com. The website database combines the mood data of some 10 million LJ users (they say 80% of posts attach moods) to form emotional trends. Much like Technorati uses blog tags to uncover the subconcious collective disposition of bloggers, MoodViews reveals correlations between world events in a socio-emotional context. Every ten minutes MoodViews is able to publish the new pervasive mood amoung new LJ posts as a continuously updated image file. For instance, here's what's cooking right now on LJ:
As a result, some collective moods have revealed cyclic behavior. In addition, LJ users show many of the same reactions to world events as other bloggers, albeit through their moods rather than some measurable content. By logging the data in MoodView, the creators can predict the mood over a period within some general accuracy.
For more interesting graphic analysis of LiveJournal's "mood", please visit our friends at MoodViews.com