No. You should expect regression to the mean compounded with the higher variance of childhood scores and the decline of Gf beginning in the 20s. I don’t know how much lower those would make one predict IQ at age 30, though.
No. You should expect regression to the mean compounded with the higher variance of childhood scores and the decline of Gf beginning in the 20s. I don’t know how much lower those would make one predict IQ at age 30, though.