Prof Richard Bentall of the University of Liverpool’s Institute of Psychology, Health and Society and his research team have shown that the risk of developing psychosis increased proportionately with the amount of abuse or trauma a child suffers.
About 1-3% of the population suffer Schizophrenia and it is one of the most severe types of mental illness. It is characterised by hearing voices, bizarre beliefs and loss of motivation.
See also Cannabis use and schizophrenia
Download Lancet article