naturalplastic wrote:
How can you have "severe autism at any level of functioning".
If you're 'severe' than you're at a low level of functioning. If you're at a high level of functioning than you're not severe.
It can totally happen.
Okay, think of a typical case of Down syndrome/Autism. This is common with DS; about a quarter of people with DS also have autism. But it can be quite mild autism, equivalent to Asperger's if you compare them to a non-autistic DS person the same age. So that is a case of someone with mild autism, but who may not be very independent, who may need 24-hour care. This is common in autism/ID.
Now think of someone with rather extreme autism. Executive dysfunction, problems with speech, problems with social communication. But they are very good at working with their autism. They find ways around their drawbacks. They learn sign language or use a VOCA. They learn how to communicate. Someone like this, with extreme autistic traits but very good ability to adapt to a non-autistic world, will be severely autistic but may be completely independent. Or they may be partly independent, but managing all their own services, maybe even employed and paying their own aides instead of depending on family. That can happen, too.