We still don’t know exactly how much genes contribute to intelligence, with various studies coming up with estimates ranging from 40 to 80 per cent.
This wide range of estimates might have arisen because genes contribute more to IQ as we get older, according to a study published last year.
They suggest that either the brain rewires itself as you get older (yeah, right), or:
Alternatively, they may dictate whether someone is likely to seek out stimulating experiences to help their brain grow and develop.
I think I’d agree. I’m always surprised at how incurious people are when they leave school and no longer forced to learn new things every day.
Learning just ain’t fun for some…