研究：左撇子易患心理疾病_BEC初级作文

研究：左撇子易患心理疾病

研究：左撇子易患心理疾病1 However, the Wall Street Journal reports there is also good news for lefties of the world, (of which I am one):

On average there is no significant difference in IQ between righties and lefties, studies show, belying popular perceptions. There is some evidence that lefties are better at divergent thinking, or starting from existing knowledge to develop new concepts, which is considered an element of creativity.

And whatever their political persuasion, lefties are in good company: Six of the past 10 presidents, including both Barack Obama and George H.W. Bush, have been left-handed.

Still, left-handed people, perhaps owing to their greater artistic inclination, tend to earn about 10 percent less in annual salaries than their right-handed counterparts, according to a recent Harvard University study.

Doctors are still unable to determine what causes hand preference but are finding that environmental factors, particularly stress in the womb, may play a leading role:

Babies born to older mothers or at a lower birth weight are more likely to be lefties, for example. And mothers who were exposed to unusually high levels of stress during pregnancy are more likely to give birth to a left-handed child. A review of research, published in 2009 in the journal Neuropsychologia, estimated that about 25% of the variability in handedness is due to genetics.

People commonly say that left-handed people operate with the right side of their brain, while right-handed people use the left side. And to some extent, that's not only proving to be true, but may also explain why lefties are slightly more prone to psychological disorders: