Researchers analysed data from around 100,000 people which could help them discover why some people develop particular diseases and others do not.
To test the findings, researchers gathered data from previous genetic studies of other mental and physical health factors — such as Alzheimer's disease, schizophrenia and autism.
When they compared each person's mental test data with their genome, they found that some traits linked to disease and thinking skills shared the same genetic influences.
The findings were published in the journal Molecular Psychiatry.



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