http://news.bbc.co.uk/1/hi/england/manchester/7828121.stm
Im not using this article as legitimate research, but a sentence in it does raise a good point.
If dsylexia is near epidemic in Britain, yet in a diverse larger country like South Korea, its is virtually unheard of!
I think the name you give it is irrelevant.
Just because South Korea doesn't really find many case of dyslexia, doesn't mean it doesn't exist. 20 years ago, children who fell badly behind at school will have been labelled dumb.
What nobody sat down and thought about, was what made those children significantly "dumber" than the average child. There is huge swathes of human genetics we don't understand fully, so why is one child significantly more intelligent than the average, and one significantly lower ?
We haven't thought up a name for it yet, but there will be some reason why some children can do A Levels at 8, and are incredibly intelligent, compared to some 8 year olds, who, despite 1 to 1 teaching cant even read and write properly yet.
Its all to easy just to write these children off as dumb, as South Korea most probably does, preferring not to label them and educate them as normal.
But the fact that some children will find it harder to learn than others will be down to some genetic difference. The fact we choose to give a name to that genetic difference and South Korea doesn't, doesn't mean it doesn't exist.
We haven't given a name to the variance that enables the great scientists of this world to learn so much quicker and earlier than average people, we just call them a genius, or a boy wonder.
But again, just because we don't have a name for it, doesn't mean that some kids aren't stratospherically more intelligent than average children.
So how do you explain the structural neurological differences on PET scans and MRI's then?
Exactly
There is a difference there, there are differences that work the other way as well making children incredibly more intelligent than average, as well as incredibly less.
Some people just object to the naming and labelling of children and make out its all fake.