A lot of the people self estimating their own IQ as being very high are using their SAT/ACT scores, which have been shown to be highly correlated with IQ scores (at least at a certain point in time).
A lot of the people self estimating their own IQ as being very high are using their SAT/ACT scores, which have been shown to be highly correlated with IQ scores (at least at a certain point in time).