Psychotic experiences, cognition, and neurodevelopment
Psychotic experiences (PEs) are an expression of psychotic traits at levels below the traditionally high threshold of clinical significance and are far more prevalent in the general population. These symptoms typically dissipate over time, but the presence of PEs is associated with an elevated risk of developing a clinical psychotic disorder, such as schizophrenia. In addition, PEs show associations with neuropsychological impairment and disturbances in brain structure and function. It is thought that PEs are driven by similar neurodevelopmental and environmental mechanisms, but it is unclear how similar the underlying pathways are. This chapter will discuss the cognitive difficulties and differences in brain structure and function associated with PEs. Then, it will examine these in relation to typical neurodevelopment and the course of impairment towards clinical psychotic disorders.