"I think in the paranoid spectrum it's quite clear that you're more likely to have paranoid thoughts if you're younger and if you live in cities or were raised in cities, for example. It also links to taking illicit substances such as cannabis. But as a psychologist what I'm particularly interested in is that people who tend to worry more, people who aren't sleeping so well, people who feel more miserable about themselves, are also more vulnerable to paranoid thoughts."