What is the odds of having 3 double exceptionals in a class

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So the rate of Autism diagnosis in an advanced country like Hong Kong is 1% around. 70% of the 1% are mentally ret*d and cannot get into a mainstream school, which means only around 0.3% of people going into main stream school are autistic. Also, my school is Band 1 school, which means that only top 33% of students can get into. This means that around 0.1% of people getting into a Band 1 school (there are 3 bands) are autistic.

OK, the chance of having 3 autistic (possibly 4, including me, suspected HFA) is already redic low. And wait, they are all gifted (IQ>130). So what is the chance of having 3 autistic+gifted studens in a band 1 mainstream school class of 30 students? This is really sick LOL.

Mathematician plz.

1 out of 7 kids in the US is special needs. Many people with Asperger's in the US - and most people outside the US and Western Europe who have Asperger's and HFA are not diagnosed or just find out until later. The real rate of ASDs is probably much higher than 1%.

A lot of people who are intellectually disabled in the US do go to mainstream schools if they're in a good district that does not discriminate like that. And I doubt that 70% of autistics are ID. ID people probably occur at roughly the same rate in the autism population as in the mainstream population.

the diagnosis rate in HK is def lower then US. so I think 1% is a reasonable estimation, maybe not. im not sure.

ya im not sure wats the MR proportion of those with autism. there are a lot of different data bout it.

Let's see. Gifted should be... what, two standard deviations above the average? So that's about 2% of people, or so. Then about 20% of people have some kind of disability, physical or mental, so we'll say 20% of 2%, for a total of .4%, or 1 in 250 children.

It shouldn't be totally unknown to have three such twice-exceptional students in one class, especially since your school is restricted to good students--people who are more likely to be gifted. The top 2%, when you have only the top third of the population, is actually the top 6% of the school, which would make the twice exceptional population 1.2 per 100 children.

More gifted children equals more twice-exceptional children... a high-powered school that does not reject disabled children will have quite a few twice-exceptionals.

In the U.S , some places try to spread the autistic kids out; but some will give them to the same teacher if they can, if they know a particular teacher handles them well. It may have been planned by the principal/

ok so lets say 6% of students in my school in gifted (IQ>130), which means that there is ~2 gifted students in a 30-man class.

so how many % of gifted people are autistic?

any maths plz?

Well, is this school you're talking about average? Our local school has quite a few autistic kids (of course just my family contributed two already) which isn't that odd to me. Each area is different. Now if I were to have 5 kids or something, chance is high that 3 of them would be both autistic and gifted, because I am.

*I do think HFA kids are more likely to have high IQ, although not that much higher than the average population, say 5% instead of 2%.

If I lived in China, I woudn't even get accepted into a "mainstream" school. Those asians are pretty smart. The Chinese school systems would leave me in the dust with the homework.


Asians promote hard work and good grades in school. I'm just happy to even pass my classes. (especially math)

Well, around one of 40 people has an IQ over 130. So, if you took a random sample of 30 kids, having 3 with IQ over 130 would be unusual, even discounting autism.

The rate of gifted autistics is higher than would be expected by chance. Although very little statistical data has been done, similarities in neurological organization between autistic people and eminent scientists has been documented, and what data is available suggests that many HFA/AS people have IQs above 130. Nevertheless, there are still plenty of non-autistic gifted kids.

But this all assumes your school is a random sample, and you've said it isn't. Assuming that the academic abilities of the students reflect their IQ, a Band 1 school should consist of kids with an IQ of about 107 and higher. This would predict that 29% of the kids in your school have an IQ above 130, meaning that out of 30 kids, you'd expect 8 or 9 with IQs over 130. Given the elevated rate of HFA/AS among gifted kids, having 3 or 4 HFA/AS + gifted kids would not be that unexpected.

IQ is like penis size. It is often exaggerated. Just go to stats page and see how 90% of people claim to have an IQ of 120 and up.

btw im an aspie and I have a normal IQ.


I think aspies appear to be smarter because many aspies tend to be logical. That doesn't necessarily make them smarter than most of the population. People who are logical and use big words appear to be smarter.

Having an ASD makes me exceptional?

Awesome.

2E here->ASD+IQ144
Prestigious high stress Taiwanese mainstream school.
...nearly failing math as of right now. Hm.