I have had first-hand experience with this: video games are largely made for males - partly due to video game developers being largely male. When boys prioritiz

I have had first-hand experience with this: video games are largely made for males - partly due to video game developers being largely male. When boys prioritize playing video games, this impacts their academic performance. Also, the rise of at least one series of books targeted towards females (twilight saga) has likely had a huge impact on the reading levels of girls since 2005, while the last best-seller books targeting boys (Harry Potter) was made back in 1997 and has since lost much of its appeal. Also, Harry Potter didn't outright exclude girls with its content, while Twilight saga was hated almost unanimously by boys. As a result, you find more girls reading for pleasure. The effects of arts and culture are probably as important as the genetics/hormones of growing children.