Asperger syndrome is a form of autism, representing the higher functioning end of the spectrum. It is often known as a ‘hidden disability’ as there are no outward indications of a disability. Typically, these individuals have an average IQ or above, but have difficulties expressing themselves emotionally and socially and it is common for them to be markedly clumsy. The disorder differs from autism primarily in that there is no general delay or retardation in language or in cognitive development. Individuals may have problems forming relationships and may show a lack of understanding about unwritten social rules e.g. personal space. Adults can often seem uninterested or aloof. Individuals may display an intense or nearly obsessional interest in certain topics which they can be highly motivated to talk about. Like individuals with autism, individuals with asperger syndrome benefit greatly from having a clear, well-structured routine.