Do your friends influence your behavior? Of course they do. But it’s hard to actually measure their influence. Social contagion is difficult to distinguish from homophily, the tendency we have to seek relationships with people like ourselves.
In response to the “happiness is contagious” phenomenon promoted by Nicholas Christakis and James Fowler, we here at onehappybird were wondering whether happy Twitter users were more likely to be connected to each other. In other words, is happiness assortative in the Twitter social network? (See related work here.)
In the image below, each circle represents a person in the social network of the center node. We color nodes by the happiness of their tweets during a single week. Pink colors are happier, gray colors are sadder, and nodes depicted with the color black did not meet our thresholding criteria (50 labMT words).
We established a friendship link between two users if…
View original post 444 more words