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Male and female mean IQs are about equal below the age of 15 but males have a higher mean IQ from age 15 on. The effect of sex differences in IQ is largest at the high extreme of intelligence. Since many of the more prestigious roles in society are associated with high IQ, the lack of female representation in these roles may be partially due to fewer females being competitive at the highest levels. This does not mean that females should not be given equal opportunity to demonstrate their abilities as this would create an worsened artificial ‘glass ceiling’