In 2001, political psychologist Aubrey Immelman made an IQ estimation of G. W. Bush based on the
SAT Reasoning Test results of Bush (1206) and
Al Gore, who achieved IQ scores of 133 and 134 in his school years, and an SAT of 1355: "It's tempting to employ Al Gore's IQ:SAT ratio of 134:1355 as a formula for estimating Bush's probable intelligence quotient—an exercise in fuzzy statistics that predicts a score of 119." A 2006 study analyzing presidential IQs by
Dean Keith Simonton of U.C. Davis appeared in the journal
Political Psychology. Simonton's study analyzed the results of varied and often subjective historical material using the tools of
historiometry. It estimated
IQs for all US presidents, and validated the headline of the hoax, which stated Bush's was the lowest of any president in the last 50 years, though it estimates his IQ considerably higher (by nearly two
standard deviations) than the 91 suggested in the hoax report. It rated G.W. Bush second to last since 1900, with an estimated IQ of 119 (the estimates ranged from 111 to 139). Bush's estimated IQ was less than those estimated for
Grant (120),
Monroe (124), and
Harding (124). The same study estimated president Bill Clinton's IQ at 149, behind only those of
Kennedy (151),
Jefferson (154) and
John Quincy Adams (169). Simonton's 2006 study follows earlier studies done on this subject, including a 1926 study by
Catharine Cox Miles. This study concluded that there is a
statistically significant correlation of 0.56 between a U.S. president's IQ and his
perceived amount of success. It is worth noting that other sources and/or studies might have different results for the IQs of United States presidents. For instance, John F. Kennedy's IQ has also been estimated to have been significantly lower than in this 2006 study (Chester Arthur
biographer Thomas C. Reeves refers to an actual IQ test by Kennedy with a score of 119), while Richard Nixon's IQ has also been estimated to have been significantly higher than in this study. ==See also==