What is PDD-NOS???

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I was diagnosed with it for a while, then was diagnosed with Asperger's. Is it similar to Asperger's?

PDD-NOS = on the autistic spectrum but doesn't fit the diagnostic criteria of either classic autism or Asperger's.

hear's alink you can check. http://en.wikipedia.org/wiki/PDD-NOS

It can be. They are both on the higher end of the spectrum, though due to the nature of PDD-NOS it may be less or more severe than most cases of AS. A lot of PDD-NOS diagnoses are what is going to be called a social learning disorders, but some are more of autism that is atypical for autism.

The truth is that PDD-NOS is not a neat diagnostic category (a "junk drawer"), it's less recognized by the public (and even professionals), thus there's a preference among diagnosticians towards Asperger's, without any serious scientific basis. I've seen many cases when a PDD-NOS dx was later changed to Asperger's. Non of them is more severe than the other, though. If the psych thinks you don't fit in the stereotype (which is quite arbitrary and varies from person to person), you can't be diagnosed with it. Furthermore, some professionals think that PDD-NOS is a milder condition, which isn't. So, when the psych thinks you could fit in the stereotype of autism, but your symptoms are much lighter (as you show up to them at the sessions), they sometimes give you a PDD-NOS dx, as it's sometimes considered "HFA". This happened to me.