Hi, I am new here. My son is 3 and was diagnosed with High-Functioning Autism (HFA) about 3 months ago. Lately he has been having anger issues and being defiant over every little thing. I am starting to wonder that his meltdowns are more to do with ODD than autism. How did you know? What works best to calm your child down? Also, in reading the forums, I've noticed "easy child" and "difficult child". Can someone explain what that means? Thanks.