Source: The Telegraph
quote: Look you're full of shit, give it up. This thing exists, and it's going to take more than your opinion to convince me.
quote: The mainstream scientific consensus is that, as with other mental illnesses, there's no blood test or brain scan that proves an individual has ADHD. The disorder instead is diagnosed via a checklist of troublesome behaviors, including impulsivity, daydreaming and forgetfulness. What makes the diagnosis particularly difficult, Hinshaw said, is that those behaviors all fall within the normal range of human behavior. People with ADHD are simply farther out on the spectrum, and, often, enough so as to wind up in constant trouble. In addition, symptoms typical of ADHD can also stem from other illnesses or injuries. Swanson said scientists are probably years away from a biological test for the disorder, though the new study is a step in that direction.