Me and dh have been seeing the consultant psychologist attached to CAMHS as part of ds1's assessment.
His pet theory appears to be that 'attachment disorder' as being responsible for most, if not all, developmental disorders
I even asked him outright if this was the cause of autism and he wouldn't give me a clear answer. I honestly fear that he believes it is 
He went on to describe that neurons in the brain can be disrupted/destroyed if an infant isn't appropriately responded to and that even things like milk allergy and feeding problems can lead to AD as can PND (the universal get out clause). This seems to be quite a good get out clause for CAMHS who seem determined not to diagnose anybody with anything whatsoever at all.
I explained that ds1 was showing exactly the same problems that his father has even down to the soiling and tics, but this bloke was having none of it and basically tried to fob us off.
He acknowledged that 'Refrigerator Mother' theory was controversial, but that nobody has ever come up with a reasonal explanation for autism, asd, adhd etc. so this theory is as valid as anything else that has been suggested
He said that asd, adhd, aspergers etc. all seem to have symptoms in common and many crossover points.
The most frightening thing about all this is that this bloke honestly believes this discredited drivel 
How the actual fuck are we supposed to obtain an objective assessment?
Where do we go from here? I've told the school nurse that I don't really have any faith in this bloke, but she said that he has to start from scratch.
ds1 has never been neglected or abused.