Ellie,
I am in Illinois - I can't speak to other states - but here we have specific laws that cover special needs children and their testing.
There is a specific battery of tests that are done for school age children within the school district - here our state pays for an independent psychologic evaluation upon parental request - that looks for autism.
There are two specific tests that are done - the first is the ADOS, the second is the ADI-R - here is more info:
ADOS & ADI-R Brochure
The brochure talks about these two tests and then also provides details on how a diagnosis is determined. It involves the school, social workers, psychologists, family physician, and the family.
We have two types of diagnosis here. One is for the school - it defines what types of supports - including social work, occupational therapy, special education, aids such as computers/laptops/tablets, classroom aides/scribes, etc. - are available to the student and can be provided through the school district.
The second type of diagnosis is considered medical - it goes through our physicians and the Easter Seals program. That diagnosis entitles the student to covered insurance support for occupational therapy and programs outside the school and in the community. In our state, for autistic children our law mandates that all kids with autism are covered for these additional community programs/therapies by insurance.
The best outcome for the child is to have them diagnosed both through the school district and the medical community.
As for the eating disorders, yes there are numerous studies and it is a huge bone of contention. They have not proved/disproved that. We have tried that with our son without success. We have also had him on multiple medications - again no success - he had such horrible side effects that any benefit of the meds was outweighed - he lost weight, had hallucinations that skeletons were talking to him, tired all the time, crying jags - and over a course of a few years we tried 4 different medications at a variety of doses. We made the decision to take him off meds.
Our son is verbal, although he has had great delays compared to peers. He has made great gains with the additional therapies/supports, we have worked wtih the school district to obtain for him. For the most part he is functioning fairly high and able to be in the general school population for the majority of the school day. Most people would not suspect that he has autism, other than very poor communication skills, inability to effectively convey thoughts/hold conversation.
Even with all this said, we are truly lucky and blessed to have him. He is super loving with us and every gain/milestone he has is a joy. He is quirky, funny, and our treasure.
