Mrsbaffled, schools and their lack of understanding and knowledge of ASD have a lot to answer for.
The questionnaire school filled out 'no problems' in all areas. Luckily for us, ds had already undergone SALT, Dietician, eye specialist and OT assessment, so by ticking 'no problems' in all areas, when experts had already identified he had 'problems' said more about school, than it did ds. It was interesting to note, that despite ticking 'no problems', when the class teacher was spoken to she actually said she had concerns with things like handwriting and ds did have difficulty interacting etc, etc. I assume school had difficulties putting 1+ 1 together! or I wonder who actually filled out the questionnaire!
Ds received his dx from a specialist ASD SALT, well it was a child development centre and paed and EP was part of the team, however it was SALT who did the assessment/observations AND the team actually communicated!
Ds's dx was based on formal assessments using tests for things such as 'social understanding' ie ds was shown pictures and asked what he thought was happening and what he would do etc. 'inferential comprehension' ie read a story, with a picture to refer to, then asked questions to see if he understood the situation. His verbal comprehension, expressive language, receptive language etc was also formally assessed and an observation in the classroom.
Observations 2 x hour long sessions in clinic observing him, taking note of his social interaction with therapist, his play etc, with the 'team' observing too.
A 2 hour interview with me when history was taken.
They also gathered information from other expert reports, school etc.
Had it been CAMHS who assessed ds, I doubt he would had got a dx. From my experience, they don't read expert reports and base everything on here and now and listen to school a hell of a lot. When ds did start seeing CAMHS (after dx) they actually said to me what makes you think he has ASD! (based on what school had told them)