Hi, My 4 year old son does not socialise with his peers at school, he has 1 friend which is a little girl his age. but when I pick him up from school or if we're out and about and a child from his class says hi or something to him, he completely ignores them as if they were not talking to him, I have asked him if he plays with lots of children at school and he says "one my 1 friend is _" and he'll say her name. At home he is very loud and boisterous, and his moods can change within a second, especially if things are not going his way, but just wondering if his lack of socialising with other children could be an indication of autism or adhd, thanks.