Der Streuung von Intelligenz (bei Frauen ist diese statistische in beide Richtungen (Schlau vs Dumm) weniger stark gestreut. 10 zufällige Männer vs 10 zufällige Frauen sind etwa gleich intelligent. Bei den 10 schlausten Männer vs 10 schlausten Frauen liegen die Männer vorne, bei den 10 dümmsten die Männer allerdings auch.

Steile Behauptung. Moderne Forschung zeigt, dass

• es im Globalwert der Intelligenz gar keine signifikanten Geschlechtsunterschiede gibt, während in der spezifischeren Verarbeitungsgeschwindigkeit Frauen vorne liegen (Gender differences in processing speed: A review of recent research, 2011)

In conclusion, females seem to have an advantage in processing speed tasks involving digits and alphabets as well as in rapid naming tasks while males are faster on reaction time tests and finger tapping. Females also outperform males in reading and writing skills. However, the review of these studies indicates no significant gender differences in general intelligence or in the more narrow skills measured by individual subtests of the WAIS III and WJ III IQ, nor in short-term memory or inspection time.

• Männer sich allerdings als intelligenter einschätzen, vor allem wenn man sie ganz allgemein danach fragt anstatt spezifische Fähigkeiten abzufragen (Estimates of Emotional and Psychometric Intelligence: Evicende for Gender-Based Stereotypes, 2004)

In line with previous studies (Bennet, 1996; Furnham, Fong, et al., 1999; Furnham, Rakow, et al., 1999), results of the present study revealed gender differences in directly self-estimated overall IQ, with men giving significantly higher estimates than women. (...) We discovered that the male-favoring difference in IC self-estimates frequently emerges when researchers request a direct overall IQ estimate, but not when they derive an estimate via the summation of multiple IQ facets.

• und auch heute noch Rollenbilder mit der Assoziation bestimmter Eigenschaften zusammenhängen, was dementsprechend auch die unterschiedliche Bewertung als intelligent vs. sozial und sprachlich bedingt (Gender and Gender Role Differences in Self- and Other-Estimates of Multiple Intelligences, 2013).

The results of vignettes’ IQ ratings revealed clear associations between intelligence and gender-related personality traits, showing that intelligence is indeed part of gender role, with higher IQ associated with masculinity. Differences in vignettes’ gender-related personality traits’ ratings show that intelligence is regarded as a more masculine than feminine attribute. The information about high intelligence overrode the effect of targets’ gender on the masculinity dimension, which was only partly true in relation to femininity. This asymmetry could possibly be explained by the fact that as masculinity and femininity are separate dimensions, masculine characteristic (in this case high IQ) has the largest effect on other masculine traits and smaller on feminine.