I found this article fascinating. I wonder if it explains Peter's terror of shadows as a young child and needing a light on in his room.
Oh and I had to single this out for special attention:
**During the course of the experiments, the children sometimes required snacks, and the researchers learned that autistic children typically have specific rules regarding food that should not be violated.
"For instance, in one case the child started screaming despite us giving him his preferred snack," said researcher Umberto Castiello, a neuropsychologist at the University of Padua in Italy. "We got very worried and asked the parents to enter the room. They entered and very calmly they said, 'Ah, OK, the snacks are not all of the same color!' For another case, same thing, same sequence of facts — the parents entered the room and said, 'Ah, OK, you did not present the snacks in a particular order.' Then, same thing with another child, and the parents said, 'Of course, the foods touch each other on the plate.'" **
I love how researchers (and this guy is a neuropsychologist!) present stuff we parents have known for years as if it is some big revelation.
(and BTW, researchers: It doesn't begin and end with snacks...)
visit my blog at www.onesickmother.com 
Edited 5/25/2010 7:51 am ET by specialmomx2