NeantHumain wrote:
If the traits of Asperger's syndrome occur on a continuous spectrum of severity and if Asperger's syndrome itself were a continuous condition, it is implied that there is a point where AS becomes indistinguishable from NTness. That is, given enough people with some shading of Asperger's syndrome, lined up in order of relative severity, you will find some mild cases who are almost indistinguishable (traitwise) from NTs with some geeky or socially awkward characteristics.
It's like how if you traveled from France to Germany, stopping in every village along the road, you would not find any real differences between the dialects of any two adjacent villages. It would seem like each village spoke the exact same language as the one before it and the one after it. Yet at the beginning of your journey you are among French-speakers, while at the end they are speaking German. The dialects shade into each other so gradually that it's impossible to point your finger to one village and say "Here. Here is where we made the switch from French to German."
It's the same thing for the continuity between ASD and NT. At one end you have those who are clearly autistic, and at the other end those who seem purely NT. Yet although the labels autistic and neurotypical would seem to indicate a binary system, the space between our two extreme exemplars is continuous, so that at some point it is difficult to determine whether someone is an Aspie-ish NT or an NT-ish Aspie. You can't point your finger and say, "Ah-ha! *This* location on the spectrum marks the changeover between Aspie and NT."
The same cannot be said of the voice-onset time distinction between the sounds "p" and "b" interestingly enough. Although voice-onset time is a continuous variable, when subjects listen to a bunch of bilabial plosives with manipulated voice-onset times, they actually can identify the point when the sound stops being "p" and starts being "b". This value is consistent across individuals moreover (although obviously it varies by language and dialect). Just a bit of interesting linguistic trivia. It's cited as an example of how much our brains are optimized to categorize and label. Our brains don't like continuous variables so we tend to turn them into discrete variables.
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Not all those who wander are lost... but I generally am.