IQ scores not as stable as generally believed.

IQ Scores Not as Stable As Generally Believed

A recent review of data suggest that IQ is not a fixed quantity as has been believed. IQ tests are used to predict academic performance, job aptitude and even the likelihood that someone will stay married. Yet, despite their prevalence and authority, researchers have found evidence suggesting that IQ fluctuates according to how much schooling a child receives. The data that support this theory show that children experience a small but consistent drop in IQ over summer vacations, that children who attend school sporadically steadily lose IQ points, …