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Teenagers’ IQ scores can rise or fall sharply during adolescence | Science | The Guardian
►http://www.guardian.co.uk/science/2011/oct/19/teenagers-iq-scores-adolescence

IQ is thought to be stable across a person’s life. Childhood scores are often used to predict education outcome and job prospects as an adult. But the study suggests scores are surprisingly variable.

Robert Sternberg from Oklahoma State University, who studies intelligence but was not in the research team, said: “A testing industry has developed around the notion that IQ is relatively fixed and pretty well set in the early years of life. This study shows in a compelling way that meaningful changes can occur throughout the teenage years.”