From ABC News:
The author of the study, James Flynn, a New Zealand-based researcher known as an IQ testing expert, said that over the past century, women have lagged slightly behind men in IQ testing scores, at times by as much as five points. But now, Flynn said women have closed the gap and even inched ahead in this battle of the intelligent sexes.
“Over the last 100 years, everyone in the developing world has been gaining about three IQ points, but women have been gaining faster,” Flynn told ABC News. “This is the result of modernity. In every country where women have an equal chance of modernity, women have caught men [in IQ testing].”
Flynn has not yet published the results of his study, saving that for a book he will publish in September. But he told ABC News that he collected data from Australia, New Zealand, South Africa, Estonia and Argentina on scores on a standard IQ test, called the Raven test. Each country tested at least 500 men and 500 women, most between the ages of 15 and 18, Flynn said.