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It is possible that one in seven American children have Attention Deficit Hyperactivity Disorder? 

Because that's how many are diagnosed, and it is an issue that continues to roil physicians, mental health experts, schools... and parents. 

Alan Schwarz steps into the debate with ADHD Nation: Children, Doctors, Big Pharma, and the Making of an American Epidemic.  He comes to the issue with no axe to grind, but a long career as an investigative reporter, now with the New York Times.

A recent discussion on ADHD on The Exchange focused on the big picture: the numbers of people diagnosed with the condition, and how fast that number is rising. 

We take another look at attention-deficit/hyperactivity disorder with psychologist Wes Crenshaw.