Hello, My son Geoff is almost 5 now and was formally diagnosed as high functioning autistic when he was almost three. His
development and behaviour
sounds very similar to yours at the same age. Since learning of his condition, I have also discovered there are other characteristics assessed when a diagnosis of autism is confirmed. As a three year old, Geoff's head was at the large end of the scale for his age, although he is now starting to "grow into it".