LabPet wrote:
For ex: I am an Aspie (by formal Dx). I have allergies (i.e., shellfish, etc). Guess what - Aspies (& other ASD) have a higher incidence of having alleriges. But they are in no way related. You are making a common layman's error.
For ex: I am (was - I had lasik though) very nearsighted. Guess what - Aspies do have a higher incidence, statistically, of being nearsighted. But they are in no way related.
Ehh, if allergies and nearsightedness (and a thousand other traits) are correlated with ASD, how do you know they are not related? I think you are making it easy for yourself here. Sure, there certainly is not much of causation between allergy or nearsigthedness and problems with reading facial expressions, but then there is no causation between having special interests and having problems with reading facial expressions either. In the first case, these traits are not traditionally associated with ASD, while in the second they are. Why would we relate special interests to ASDs when we don't relate allergies? In both cases there is only correlation, not causation.
To put it simply: Your model is just to simple. Traits correlated with ASDs needs to be explained, not ignored. Regardless if they are part of diagnostic criteria or not.