A variety of studies suggest that 15% of the world population is left-handed.
- About 20 percent of people with schizophrenia dominantly use their left hands.
- Studies indicate that left-handedness is more common in males than females.
- Left-handedness, in comparison to the general population, also appears to occur more frequently in identical twins.
- Statistically, the identical twin of a left-handed person has a 76% chance of being left-handed, identifying the cause(s) as partly genetic and partly environmental.
- In America, 12% of 20 year olds are left-handed, while only 5% of 50 year olds and less than 1% of people over 80 are.
- South Asian, Eastern European, Southeast Asian descent are more left-handed than any other ethnic groups in the world, while people of Western European, Northern European, and African descent are less left-handed
Here is a great infographic about left-handed facts and statistics:
- Left-handers are more likely to be geniuses. 20% of all MENSA members report being left-handed.
- A study found left-handed men are, on average, 15% richer than right-handed men for those who attend college, and 26% richer if they graduate.
- Left handed people are three times more likely than right-handed people to become alcoholics
- If both parents are left-handers, 50% of their offspring will be left-handed. Two righties only have a 2% chance of having a lefty.
- Psychologists from Queen;s University Belfast found that female cats are more likely to be right pawed, while male cats tend to be left-pawed.
- Lefties are more likely than righties to really, really hate spiral notebooks.
- Research conducted by Dr. Nich Cherbuin shows that lefties are better at handling large amounts of stimuli, making them naturally better at playing video games.
- Statisitically, the older a mother is, the more likely she is to give birth to a left-handed children.
- Left-handers are believed to reach puberty 4 to 5 months after right-handers.
- Living in a righty’s world: only 50% of lefties report using a computer mouse with their left hands. Similarly 68% use their right hand for scissors and 74% hold a dinner knife in their right hand.
- Defying the odds: 4 of the 5 original designers of the Mac computer were left handed. Of the last 5 presidents, 3 are left-handed (Obama, Clinton, Bush Sr.)
- According to one study, lefties have an average lifespan that is nine years fewer than that of righties.
Population of Left Handed People – Lefty Shoppe