The findings for fluid intelligence — the brain’s raw speed — were different for men and women.
The brains of people with high IQ have very efficient wiring, new research shows.
The brain’s ‘wiring’ or ‘white matter’ refers to the nerve fibres that transmit information between areas.
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White matter is sometimes called the superhighway of the brain: it transmits signals and regulates communication.
People with more efficient white matter, the study found, had greater general knowledge.
General knowledge — or as psychologists call it, crystallised intelligence — is one of two broad aspects of intelligence
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