Some of his findings related to intelligence include:Although at least a moderately high IQ is important for the achievement of eminence, statistical analyses demonstrate that intelligence accounts for only about 4-5 percent of the variance in measures of cultural eminence. Developmental, motivational and personality factors seem to matter a great deal more. Thus, very intelligent people do not necessarily accomplish great things (Simonton, 1999a; Simonton, personal communication, July 5, 2003).The relationship between IQ and persuasive influence over other members of one's group may drop off beyond an IQ of approximately 120. Individuals who are very smart may be less comprehensible to other group members, and this might have a negative impact on their ability to influence those around them. Even if the exceptionally bright individuals are able to target their use of language to the needs of their audience, the complexity of their ideas may be less accessible to listeners with IQs more than one standard deviation lower than their own (Simonton, 1985; 1999a). As evidence, Simonton's historiometric research demonstrates that more intelligent individuals have had a harder time getting elected to the American presidency (Simonton, 1999a)!Intelligence level impacts everyday creativity, such as that involved in problem-solving, but individuals with very high intelligence do not necessarily demonstrate the type of creativity that will make an impression on society at large (Simonton, 1999a).