I saw this linked to when I was catching up here on SN yesterday and today I took the test answering for DS. He got a score of 165 "Severe PDD". I was just wondering what that actually meant?? I know it isnt like a diagnosis as such but any information is helpful for me right now so I am trying to translate it all. I need to know what I am talking about as I am not getting co-operation from doctors. Thanks!