A scientist describes finding a genetic clue to Attention Deficit Hyperactivity Disorder, or ADHD, and what this could mean for treating this condition. Aired Jul. 11, 2008 [9:22 min]

New research says that people suffering from attention deficit hyperactivity disorder (ADHD) are lacking in certain brain proteins essential for experiencing reward and motivation. [11:53]

Researchers work to understand what might be behind a surge in diagnoses of attention deficit hyperactivity disorder.