In light of my post on genetics and environment, check out this article in the New York Magazine by Jennifer Senior (H/T Daily Dish):
The Junior Meritocracy: Should a child’s fate be sealed by an exam he takes at the age of 4? Why kindergarten-admission tests are worthless, at best.
An interesting part from the article:
I wrote to Lohman and asked what percentage of 4-year-olds who scored 130 or above would do so again as 17-year-olds. He answered with a careful regression analysis: about 25 percent.I encourage you to read the article to help inject some sense into the conversations you hear about IQ and giftedness in your school district.
The implications of this number are pretty startling. They mean that three quarters of the seniors in a gifted program would no longer test into that program if asked to retake an IQ test on graduation day. So I wrote Lohman back: Was he certain about this?
“Yes,” he replied. “Even people who consider themselves well versed in these matters are often surprised to discover how much movement/noise/instability there is even when correlations seem high.” He was careful to note, however, that this doesn’t mean IQ tests have no predictive value per se. After all, these tests are better—far better—at predicting which children will have a 130-plus IQ at 17 than any other procedure we’ve devised. To have some mechanism that can find, during childhood, a quarter of the adults who’ll test so well is, if you think about it, impressive. “The problem,” wrote Lohman, “is assigning kids to schools for the gifted on the basis of a test score at age 4 or 5 and assuming that their rank order among age mates will be constant over time.”
Appelbaum, McCall’s co-author, puts an even finer point on the stakes. “No university I know,” he says, “would think of using a 4-year-old’s data to decide who to admit.”