Simon Baron-Cohen (and let's get this out of the way - yes, he IS related to Sasha Baron-Cohen of Ali G/ Borat/ Bruno fame) is one of the world's foremost leading practitioners, researchers and authors on autism spectrum disorders. He is a professor at the University of Cambridge and the director of ARC, Autism Research Centre. ARC's website is extensive in the information and resources it provides. There you can download free tests and research papers. At a time when academics like to keep their work under subscriptions and fees, Baron-Cohen makes all of his lab's work readily available to the public. This calls for many a fireworks display of hearts.