Six out of 1, 000 children worldwide are currently affected by autism spectrum disorder, including autism and Asperger Syndrome. These disorders disturb the development of the mind. They cause a wide variety of communication problems, social difficulties, and repetitive or obsessive behaviors. At one end of the spectrum, severe autism can leave a person unable to talk or interact with others. At the other end of the spectrum, someone with mild Asperger Syndrome might have unusual habits and problems holding conversations. Learn the possible causes of autism and Asperger Syndrome, new treatments and diagnostic tools, and more in this insightful overview.