BackgroundNon-clinical psychotic symptoms appear common in children, but it is possible
that a proportion of reported symptoms result from misinterpretation. There is a well-
established association between pre-morbid low IQ score and schizophrenia. Psychosis-like
symptoms in children may also be a risk factor for psychotic disorder but their relationship
with IQ is unclear. AimsTo investigate the prevalence, nature and frequency of psychosis-
like symptoms in 12-year-old children and study their relationship with IQ …

… IQ and non-clinical psychotic symptoms in 12-year olds : results from the ALSPAC birth
cohort … Thompson, Andrew, Horwood, Jeremy, Salvi, Giovanni, Thomas, Kate, Duffy, L.,
Gunnell, David, Hollis, Chris, Lewis, Glyn, Menezes, Paulo, Wolke, Dieter, Zammit, Stanley
and Harrison, Glynn (2008) IQ and non-clinical psychotic symptoms in 12-year olds : results
from the ALSPAC birth cohort. In: 6th International Conference on Early Psychosis,
Melbourne, Australia , 20-22 Oct 2008. Published in: Early Intervention in Psychiatry, Vol.2 (Suppl.1). …