I think that the authors of this paper have a very Lilliputian view of how high achievement can get with gifted people, especially gifted kids.

It ought to be obvious to the authors ( but clearly isn't ), that if the ceiling is too low and the starting value is close to it ( pretty well at it given margins of error and EF at that age) then one isn't going to observe a large positive delta because there just isn't the head room.

Last edited by madeinuk; 09/10/14 04:32 AM.
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