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DID YOU KNOW ?. #FACTSOFLEFTHANDEDPEOPLE.

[Audio] Did you know11% of people are left handed.

[Audio] It's not just genetics Left-handedness does tend to run in families, "but noticeably less than other inherited traits, like height or intelligence." In fact, identical twins, who share the same genes, can sometimes have different dominant hands..

[Audio] It's linked to stress in pregnancy In one British study, the fetuses of super-stressed pregnant women were more likely to touch their faces more with their left hands than their right. This could be the first signs of a left-handed child, say the researchers. Other evidence supports that theory. In one 2008 Swedish study of moms and their 5-year-old children, women who were depressed or stressed during their pregnancies were more likely to have mixed- or left-handed kids. In other studies, babies with low birth weight, or born to older mothers, were more likely to be lefties as well..

[Audio] It's more common in twins Identical twins are sometimes mirror images of each other—one twin has a mole on her right cheek and the other has a mole in the same spot on her left cheek, for instance. It was once believed that twins' genetic makeup should be "mirrored" as well—therefore, one twin should be left-handed and the other should be right..

[Audio] It doesn't make you "right-brained" Most right-handed people use the left hemisphere of their brains to process language, but that doesn't mean most lefties are "right-brained"—that's just a common myth, according to Gina Grimshaw, PhD, director of the Cognitive and Affective Neuroscience Laboratory at the University of Wellington in New Zealand. About 98% of right-handers are left-brained, but so are about 70% of left-handers..

[Audio] It may cause you to think differently Society tends to associate the left side of something with the bad (" two left feet"), and the right side with the good ("my right-hand man"). But if you're left-handed, you might not think the same way as righties, according to a 2009 Stanford University study. Participants were shown two columns of illustrations and asked which seemed more intelligent, happy, honest, and attractive. Righties were more likely to choose the illustrations in the right column, while lefties were more likely to choose the drawings in the left column. "For left-handed people, implicitly, they think good stuff is on the left and bad stuff is on the right, even though consciously, explicitly, everything in language and culture is telling them the exact opposite,".

[Audio] It can affect school performance In a 2009 study of children 11 and younger, Australian researchers found that left-handed kids performed worse than right-handers several measures, including vocabulary, reading, writing, social development, and gross and fine motor skills. Mixed-handed kids performed even worse than lefties. Mixed-handed and left-handed children are more likely to use the two halves of their brains in unusual ways, which may put them at risk for mild learning disabilities, says Yeo. At the same time, however, some mixed-handed kids have an unrelated learning disability that's making them struggle to decide which hand to write with. Either way, most kids catch up with their classmates as they get older, he says—being left-handed or mixed-handed isn't a surefire predictor of how well kids perform as they grow Up..

[Audio] It may make for better fighters In a 2005 French study, researchers found that southpaws made up just about 3% of the population in the most peaceful primitive societies, but 27% in the most warlike ones. Why? It goes back to the idea that lefties have a physical advantage over righties. In violent societies, researchers theorize, left-handers benefit from their unexpected left hook..

[Audio] It doesn't make you more creative Left-handed people are often credited with being more creative than righties, but that's a hard thing to measure. That rumor may come from a 1995 study that found left-handed men tended to engage in more "divergent thinking" than right-handed men—meaning they explore more options to solve a problem than the ones readily available..

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