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.
Quote:
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.