Asperger's Syndrome affects boys three to four times more than females. The majority of instances are discovered between the ages of five and nine, with some discovered as young as three. Around one in 100 people have Aspergers. Some studies have shown that people with Aspergers are two to four times more likely than others to be high-functioning users of autism spectrum disorders (ASDs). High-functioning means that they have good social skills and functional communication abilities. People with Aspergers often have difficulties understanding other people's emotions and can appear cold or insensitive. They may also have problems forming relationships with others or having interests that stand alone for long periods of time. On the positive side, people with Aspergers usually do well in school settings where there are clear rules and guidelines. They also tend to make good clerks or secretaries because they are careful not to offend others by being too friendly or engaging them in conversations that are not appropriate. Asperger's Syndrome is diagnosed based on an individual's behavior and how it compares to typical children of a similar age. There are several different tests used to diagnose AS/PDD-NOS, but the most common is the Autism Spectrum Quotient (AQ) test. This questionnaire consists of 50 questions that measure the degree to which an individual exhibits traits associated with autism.