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First symptoms of psychosis evident in 12-year-olds
Date:4/30/2010

DURHAM, N.C. Children normally experience flights of fancy, including imaginary friends and conversations with stuffed animals, but some of them are also having hallucinations and delusions which might be the early signs of psychosis.

A study of British 12-year-olds that asked whether they had ever seen things or heard voices that weren't really there, and then asked careful follow-up questions, has found that nearly 6 percent may be showing at least one definite symptom of psychosis.

The children who exhibited these symptoms had many of the same risk factors that are known to correlate with adult schizophrenia, including genetic, social, neurodevelopmental, home-rearing and behavioral risks.

"We don't want to be unduly alarmist, but this is also not something to dismiss," said co-author Terrie Moffitt, the Knut Schmidt Nielsen professor of psychology and neuroscience and psychiatry & behavioral sciences at Duke University. The study appears in the April issue of Archives of General Psychiatry.

The children were participants in the long-term Environmental Risk Longitudinal Twin Study in Britain, which includes 2,232 children who have been tracked since age 5 and reassessed at 7, 10 and 12.

The British study is an outgrowth of research that the same group did earlier with a long-term cohort in Dunedin, New Zealand. At age 11, those children were asked about psychotic symptoms, but the researchers waited 15 years to see how, as adults, their symptoms matched what they reported at 11. By age 26, half of the people who self-reported symptoms at age 11 were found to be psychotic as adults.

"It looks like a non-trivial minority of children report these symptoms," said co-author Avshalom Caspi, the Edward M. Arnett professor of psychology and neuroscience and psychiatry & behavioral sciences at Duke.

The findings provide more clues to the development of schizophrenia, but don't solve any questions
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Contact: Karl Leif Bates
karl.bates@duke.edu
919-681-8054
Duke University
Source:Eurekalert

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