The purpose of screening is to detect a disorder before there are symptoms so it can be treated at an earlier stage. Screening tests are usually administered to people without current symptoms, but who may be at high risk for certain diseases or conditions.

At this time, there are no tests to detect ]]>ADHD]]> before symptoms begin and no screening guidelines for ADHD. Children with this condition are often identified by their classroom teacher, or their home behavior prompts their parents to seek evaluation.