“There is solid data to show that your IQ can change during your teen years, more than anyone had ever expected. Between thirteen and seventeen years of age, one-third of people stay the same, one-third of people decrease their IQ, and a remarkable one-third of people actually significantly raise their IQ.”

“There is solid data to show that your IQ can change during your teen years, more than anyone had ever expected. Between thirteen and seventeen years of age, one-third of people stay the same, one-third of people decrease their IQ, and a remarkable one-third of people actually significantly raise their IQ.”

— Frances E. Jensen