Loneliness centres on the act of being seen. When a person is lonely, they long to be witnessed, accepted, desired, at the same time as becoming intensely wary of exposure. According to research carried out over the past decade at the University of Chicago, the feeling of loneliness triggers what psychologists call hypervigilance for social threat. In this state, which is entered into unknowingly, the individual becomes hyperalert to rejection, growing increasingly inclined to perceive social interactions as tinged with hostility or scorn. The result is a vicious circle of withdrawal, in which the lonely person becomes increasingly suspicious, intensifying their sense of isolation.