In 2006, a real study, albeit one based on varied and often subjective historical material analyzed with the tools of historiometry, was published in the journal Political Psychology. It estimated IQs for all US presidents since 1900. It rated G.W. Bush second to last, with an estimated IQ of 125 (with the estimate ranging from 111 to 139; the standard average for all people is 100). The same study estimated president Bill Clinton's IQ at 149.[10] In an interview, the study's director noted that "Bush may be 'much smarter' than the findings imply" but that he "scores particularly unimpressively for 'openness to experience, a cognitive proclivity that encompasses unusual receptiveness to fantasy, aesthetics, actions, ideas and values.'"[11][12][13]
Other researchers have looked at performances on actual IQ-correlated tests taken by George W. Bush and his two political opponents, such as the SAT and aptitude tests given to prospective military officers. These have given an estimated IQ of 125 for George W. Bush (and 120 for John Kerry and 134 for Al Gore).[14]