Impairments in cognitive performance are present before psychosis onset, however the relationship between cognitive trajectories and brain development is unknown. In this project we will investigate whether altered brain development is associated with impaired cognitive performance, and whether this is more common in those with psychotic experiences. Inflammation is thought to play a role in the development of psychosis. This project will examine whether inflammatory markers are higher in those with psychotic experiences, and whether they are associated with brain changes. We do not need additional data as we will be using data from B3035.