 Some women have reported they feel other people expect them to be more fun-loving after having lightened their hair.In much of the Americas, such as in North America, the blonde stereotype is also associated with being less serious or less intelligent.However, an analysis of IQ data carried out by the National Longitudinal Surveys on a survey database of American "baby boomers" (NLSY79 data), the natural blonde women in this population category (excluding African American and Hispanic persons) have a slightly higher mean IQ than brunettes, black and red haired women.