Should my thesis be changed? Asperger's syndrome is a milder version of form of Autistic disorder. The difference is that these individuals cannot
connect information that they learned with the real world therefore many of them have difficulty in social situations. Many of them have social dyslexia where they would feel embarrassed in a social environment and feel handicapped when trying to establish emotional bonding and social relationships. For that matter people who are diagnosed with Aspergser's have extreme difficulty starting and maintaining a social life. The syndrome does come with its advantages though, as many are incredibly bright and focus on their interests and obsessions for long periods of time. In the curious case of the dog in the night-time, Mark Haddon demonstrates both the hurtful and helpful aspects of Asperger's syndrome.
If your thesis statement is the last sentence of your introduction, it is probably fine. I'm not sure why you didn't capitalize and italicize the book title, however. Your thesis will work well as long as you rember that you are creating a two-part argument. You have to address the hurtful aspects of Asperger's, and then you have to address the helpful aspects of Asperger's. You need to be sure to use specific examples and evidence from the text to support both arguments, and you need to be sure to write the entire paper in present tense. Good luck!