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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]
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.
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 ...
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 ...
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 ...
In one of his earlier studies, Satz found that self-reported hand preference in left-handers was unreliable, and that left-handers vary more in speech laterality than right-handers. [4] Another seminal study by Satz and colleagues included their 1971 publication theorizing that there is no single mechanism underlying the developmental disorder ...
There has been a fair amount of research that associates left-handedness with the likelihood of psychotic disorders like schizophrenia.