The World Wide Web has deeply changed our world and, over years, it has shaped our society. Social networks like Facebook strongly speed up the spreading of information among users, and allow people to communicate simultaneously with several individuals. As result, when studying sociological phenomena and socio-psychological behaviors, we have to consider the inuence that the WWW has on people's life. In this work, we briey present some computational models that can be adopted for representing socio-psychological behaviors in this scenario.