CHILDHOOD AS DISEASE: Idea of New Attention Disorder Spurs Research, and Debate.

Called sluggish cognitive tempo, the condition is said to be characterized by lethargy, daydreaming and slow mental processing. By some researchers’ estimates, it is present in perhaps two million children.

Experts pushing for more research into sluggish cognitive tempo say it is gaining momentum toward recognition as a legitimate disorder — and, as such, a candidate for pharmacological treatment. . . .

Some experts, including Dr. McBurnett and some members of the journal’s editorial board, say that there is no consensus on the new disorder’s specific symptoms, let alone scientific validity. They warn that the concept’s promotion without vastly more scientific rigor could expose children to unwarranted diagnoses and prescription medications — problems that A.D.H.D. already faces.

“We’re seeing a fad in evolution: Just as A.D.H.D. has been the diagnosis du jour for 15 years or so, this is the beginning of another,” said Dr. Allen Frances, an emeritus professor of psychiatry at Duke University. “This is a public health experiment on millions of kids.”