I'm glad you asked. I don't know how to answer your question real well so I am going to leave you two links that can tell you much better than I can.
www.autismsciencefoundation.or…I read both of these before deciding to give them, why have someone read something you won't read yourself, right? Basically I decided to do a little research before gaving the U.R.L.s. You can also find other websites through Google like I found these two.
I was going to use Wikipedia but it's not always reliable or the information gets outdated and I had a college instructor discourage the use of Wikipedia and I don't blame her.
I have Asperger's Syndrome by the way, and I read about that too in the first U.R.L.
I hope this helps. And those of you with autism reading this, if you can and are willing to, please help out in answering this question. Thank you.