Asperger Syndrome (AS) is sometimes described as a 'hidden disability' because you cannot really tell that a person has AS from outward appearance. It is distinguished by a pattern of symptoms rather than by a single symptom. As part of the Autism Spectrum, there are similarities with autism. However, people with Asperger Syndrome tend to have fewer problems with speaking and are often of average or above average intelligence. Although they do not usually have the type of learning difficulties typically associated with autism, they may have specific learning difficulties including dyslexia, dyspraxia, ADHD, or seizure disorder. With the right support and encouragement, people with Asperger syndrome can lead full and independent lives. Common challenges experienced by individuals with Asperger Syndrome can be described in three main areas of difficulty: social communication, social interaction, and social imagination.