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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 ...
A 1967 study by Douglas found no evidence to correlate mathematical ability with left-handedness or ambidexterity.The study compared the people who came in the top 15% of a mathematics examination with those of moderate mathematical ability, and found that the two groups' handedness preferences were similar.
Left-handed women may have a higher risk of breast cancer than right-handed women and the effect is greater in post-menopausal women. [74] At least one study maintains that left-handers are more likely to suffer from heart disease, and are more likely to have reduced longevity from cardiovascular causes. [75]
She also contributed to the largest study of human handedness in the world giving the best estimate of 10.6% for left-handedness. [6]
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 ...
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 ...
A study done by the Department of Neurology at Keele University, North Staffordshire Royal Infirmary suggests that forced dextrality may be part of the reason that the percentage of left-handed people decreases with the higher age groups, both because the effects of pressures toward right-handedness are cumulative over time (hence increasing ...
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.