According to a recent study, men born in the winter have a higher chance of being left-handed. But what exactly does that prove?
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Men born in November, December or January are more likely of being left-handed than during the rest of the year. While the genetic bases of handedness are still under debate, scientists at the Faculty of Psychology, University of Vienna, obtained indirect evidence of a hormonal mechanism promoting left-handedness among men.
Psychologist Ulrich Tran and his colleagues published their findings in the scientific journal Cortex.
Various manual tasks in everyday life require the use of the right hand or are optimized for right-handers. Around 90 percent of the general population is right-handed, only about 10 percent is left-handed. The study of Ulrich Tran, Stefan Stieger, and Martin Voracek comprised two large and independent samples of nearly 13,000 adults from Austria and Germany.