This study should not be used to prove that acceleration is always bad, although I fear it will be. Grade placement should depend on age, IQ, and maturity. I wonder how maturity can be quantified.
Well, one of the risks is a non-issue for our kids - "80 to 90 percent increased risk of scoring in the lowest decile on standardized tests."
The other one is a major issue, because so many gifted kids get misclassified: "50 percent more likely than the oldest third of their classmates to be prescribed stimulants for A.D.H.D."
As for maturity, I think the old rule about obscenity also applies here. People think they know it when they see it.
