The hooking element is really based on intermittent variable reward. eg: when someone responds, direct messages you, etc. you can't really predict it. Twitter'

The hooking element is really based on intermittent variable reward. eg: when someone responds, direct messages you, etc. you can't really predict it. Twitter's kind of like a message board that, instead of filtering by categories or topics, you filter by people. So you can also imagine, the more people you find interesting or to interact with, the more addicting it becomes. @NathanSnell