Well the problem with a control group is that you are talking about NYC. Do you take a control group from private school with similar IQs, public schools -- but how do you find out their IQ?

With the Terman study, you had people who he had rejected in his group that went on and won Nobel prizes etc or something.

Hunter would have rejected all kinds of kids, but no records remain. That is what you need. What happened to the rejected?

Ren