On Dec 6 2011, Shirley S. Wang writes that 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.” In the next paragraph, however, she raises the point of a higher risk for schizophrenia.
Left handed people are only 10% of the population. Research has been done linking handedness and the development of the brain. The research is not conclusive at this time, however one pathway of prenatal stress is cortisol. Several studies show that pre natal issues of stress of life events of the mother result in cortisol being released into placenta barrier to influence the baby.
So is it possible that a left handed child is born with increased divergent thinking as a biological defense against a hostile world perceived by the mother?