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Well?
Poo bah 20%  20%  [ 6 ]
Flibbit 23%  23%  [ 7 ]
Boink 33%  33%  [ 10 ]
Twang 23%  23%  [ 7 ]
Total votes : 30

Sophist
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17 Feb 2008, 11:22 pm

I posted something to this effect in an earlier thread, but I rewrote it for my blog and thought I'd repost it here, since I've done a better job of rewording it and my other one seemed confusing now I look back on it.

Sorry for the slight sarcasm in advance, but certain duplicate threads do seem to pop up over and over again (which is of course the nature of a large and growing forum, but the same questions or comments do get kind of draining). It's a shame certain inevitable topic threads aren't stickied so they can be resurrected in a single place. Anyways, I digress.

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Okay, I've done the math and was quite surprised by the results. I was on Wrong Planet forum today and yet another person had posted yet another thread about how they felt that most of the people on the forum weren't autistic (apparently it's an exclusive club now). So, with an unusual burst of attentional power, I read through the 8 pages of the thread and after all that I wondered to myself, "What percentage of the world's autistic population does WP represent?"

To answer this question, I sought out the most recent census estimates. The US Census Bureau estimates that for February, 2008, there are approximately 6,649,117,969 people on earth. That's over 6.5 billion!

Also, according to recent stats on autistic spectrum conditions in school-aged children, approximately 1/150 (about 0.6%) of kids are diagnosed with an ASC. However, the more severe the ASC, the earlier it tends to be diagnosed, so some may actually be missed due to less severe traits and may be diagnosed later on, perhaps even in adulthood. Therefore, it is probably safe to assume (as do many researchers), that the actual occurrence rates of ASCs in the human population is probably closer to 1%. So, what is 1% of 6,649,117,969? It's approximately 66,491,180. Therefore, there are about 66.5 million autistic people in the world today.

And Wrong Planet? As of now, there are about 16,750 registered members; for the sake of simplicity, I will assume they are all autistic even though that's likely not the case (what with parents and duplicate or triplicate accounts, etc.). Assuming WP represents 1 out of every 100 persons, that would mean that the world's population would be 1,675,000-- that's less than 2 million people, and surprisingly even less than the total population of my hometown, St. Louis. Therefore, the number of autistics in St. Louis alone (approximately 28,010) outnumbers the total number of registered members on Wrong Planet, 16,750.

Wrong Planet [] is a huge forum and is one of the largest autism and THE largest Asperger's-related forums on the internet. So, frequently, it's members have been known to proclaim that there seems to be far too many aspies there for their liking because intuitive probability would seem to predict there should be fewer. However, as the above numbers hopefully illustrate, WP is a drop in the bucket of 66.5 million.

I think the assumption comes from the Availability Heuristic: because said member is on WP frequently and because it seems like WP has such a huge population (which, compared to other sites, it certainly does), it seems like there’s more aspies on [here] than there should be. When in reality, that’s actually not the case.

So, in the end, what percentage does WP make up of the total number of autistics in the world?

Answer:
2.5191311088177409394749799898272e-4%

(Which is a very small number indeed.)


I just thought I'd repost it because 66.5 million surprised even me. :)


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joku_muko
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17 Feb 2008, 11:56 pm

Boink!



oscuria
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17 Feb 2008, 11:59 pm

I don't believe in statistics/assumptions unless they work to my favor.



LostInSpace
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18 Feb 2008, 12:09 am

I'm surprised no one's chosen "poo bah." That was my second choice after "flibbit."



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18 Feb 2008, 12:12 am

LostInSpace wrote:
I'm surprised no one's chosen "poo bah." That was my second choice after "flibbit."


There ya go. One poo bah from me. :)



Inventor
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18 Feb 2008, 12:47 am

Perhaps true for clinical cases, where there is impairment, but some think twice as many who just get by, Sub Clinical, but I give it a biais toward European, so a lower number.

Alex is working hard to get them all, but this takes time. At 3% 9,000,000 in the US.

A year ago you could not have convinced me I was autistic, many others come and deny it, but say this fits my life and explains everything. We have only been picking up on children, and then the worst cases, for a few years, those in college and older were missed, and I think a lot of the kids are missed, due to lack of funding. If it is not a problem for the teacher, no action, and many of us are quite and good students.

Support Wrong Planet, the best thing that ever happened to the autistic. It is not likely we will ever have anything else.



fernando
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18 Feb 2008, 12:56 am

Sophist wrote:
Answer:
2.5191311088177409394749799898272e-4%

(Which is a very small number indeed.)


You know, the answer is not supposed to have more digits than the input numbers you used.


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18 Feb 2008, 1:10 am

Very interesting.
Although I am surprised that there are 66.5 million people with ASD in the world. I thought that there would be less.

Oh...and I voted "Twang". :lol:


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wolphin
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18 Feb 2008, 1:37 am

Of course, as they say, there are lies, damn lies, and statistics :)

Not that I'm doubting your number crunching, but it does seem kind of hard to believe. Perhaps it really is the case and outside of the western world, ASD's are overwhelmingly underdiagnosed (which is entirely possible and may even be likely)

At the same time, it depends on the extent to which the ASD/ASC criteria is stretched. If 1/100 people really do qualify for ASD/ASC diagnosis, but previously some only would have been labeled as "socially awkward" or such, then all of a sudden 66 million seems remarkably small, given the enormous number of people in the world that could be labeled as socially awkward (but not necessarily pathologically so)



TLPG
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18 Feb 2008, 6:26 am

I personally believe that the 1 in 150 stat is wrong. I am of the firm opinion that there are ASD's DX's being counted that are not ASD's but rather other conditions that resemble ASD's but in actuality are not. I don't know what the correct number would be though.



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18 Feb 2008, 8:09 am

IMO AS is under-diagnosed (with many aspies labeled NVLD, Schizoid, Schizotypal, Anti-Social, Schizophrenic, ADD, etc) and so the actual number of people with ASDs is probably between 2% and 3%, and the number of people with the Broader Autistic Phenotype being around 5%.


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Sophist
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18 Feb 2008, 11:38 am

fernando wrote:
Sophist wrote:
Answer:
2.5191311088177409394749799898272e-4%

(Which is a very small number indeed.)


You know, the answer is not supposed to have more digits than the input numbers you used.


I'm sorry, but you're going to have to take up your complaint with my calculator. :P


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18 Feb 2008, 11:41 am

On a side note, I feel that autism isn't limited to "pathology", so I suspect that the full spectrum probably ranges closer to 2-5%. Just my opinion, but if the spectrum follows a bell curve, the higher functioning are in greater numbers until you eek into "normality".

Schizophrenia I believe has a comparable 1% occurrence rate and is also proposed as a spectrum which ranges into "normality". Similar also for Bipolar.

You'll notice the trend here: Many developmental conditions (yes, schizophrenia is a neurodevelopmental condition) seem to range around the 1% mark, but also have many broader phenotypes.

The human condition doesn't understand what "discrete" and "label" mean.


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18 Feb 2008, 11:46 am

Statistics (whether they work in my favour of not) are too superficial to be taken too seriously, IMO.



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18 Feb 2008, 12:12 pm

Twang! 1% Seems about right to me. Go to a major league mathematics faculty and IMO you're looking at >80% autistic genotype... [/deliberately contentious statement to provoke debate]


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