Originally Posted by solaris
I'm curious (and genuinely so, wishing to learn the answer myself, and not asking to be snarky): how does one know if the child is in the top 0.1% for math?

One standard way is to take a math achievement test and score at least 3 standard deviations above average, see e.g. here
http://www.davidsongifted.org/young...holars___Qualification_Criteria_384.aspx
(so a score of 145+ on a test with mean 100, standard deviation 15).

Some school administered group tests have too low ceilings, so they can't be used to distinguish the top 0.1% (though again they can be if one takes it at a much younger than standard age).

On the other hand scoring X on math competition Y at age Z could in some cases put someone in a much narrower range than top 0.1%

Originally Posted by qxp
Is your son a DYS?

No. And Epsilon Camp has similar cutoffs. DS7 exceeds the 145 cutoff for math achievement by a ton, but doesn't have the IQ score (wide scatter). The testing was done for free by a school, and after that I came across this forum when googling for information to understand scores, so hadn't heard of DYS. We decided we weren't going to bother with IQ testing again. In math, I believe competition results will count for more, and can ultimately distinguish those at high level in math specifically. It's actually a bit odd that they ask for an IQ score (maybe they think they don't have much to go on at these ages and want an extra filter). The "older" camps don't seem to mention such scores at all. I have no doubt that DS7 is mathematically good enough for this camp (when he's older, maybe 2015), so I'm tempted to say, "here are his scores/results/schoolwork/recommendation, obviously he's good enough, we're not doing IQ testing, take it or leave it". Anyone else considered this approach?