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For example, if the incidence of female left-handedness was 10%, then the incidence of male left-handedness would be approximately 12% (10% incidence of left-handedness among women multiplied by an odds ratio of 1:1.23 for women:men results in a 12.3% incidence of left-handedness among men). [94] [clarification needed]
Conversely, left-handed women earn about 7.5% less than right-handed women. [ 91 ] [ 92 ] During the residency period in operation theatres, right-handed surgeons may be irritated by left-handed residents, and left-handed residents have lower performance scoring compared to their right-handed counterparts.
Homosexual men were 82% more likely to be non-right-handed than heterosexual men, but no significant differences were found between heterosexual and homosexual women in terms of handedness. When combining men and women into one large sample, homosexual individuals were 50% more likely to be non-right-handed than heterosexual individuals. [5]
Older Women Have More Left-Handed Babies. According to one Canadian study, women in their 30s and 40s were far more likely to have left-handed children than younger women. A study of 2,228 college ...
An older study found that left-handed people were better at "divergent thinking", and a more recent research cites lefties have better working memories and mental flexibility. 5. Don't get too ...
Left-handed people only make up about 10% of the world's population — so you might be surprised to learn how many of them have been world leaders, artists, well-known athletes, award-winning actors.
Also, naturally left-handed musicians have to play with right-handed-only instruments (violin, viola, cello). Kurt Cobain, frontman of Nirvana, was naturally ambidextrous. He grew up having a slight preference for his left-hand (as can be seen in many of his childhood photographies), but as an adult he wrote right-handed.
While these genetic variants account for only a tiny fraction - perhaps 0.1% - of left-handedness, the researchers said the study shows that this gene, called TUBB4B, may play a role in the ...