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left-handedness

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
left-handedness
[left′ han′didnes]
a natural tendency by some persons to favor the use of the left hand in performing certain tasks. Also called sinistrality. See also cerebral dominance, handedness.


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Wells says that hormone levels may help explain sex differences in paw choice, for studies conducted in the past have linked prenatal testosterone exposure to left-handedness.
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For instance, some may award a scholarship for left-handedness, artistic talent, excellent written communication skills, and even either below or over a specified height.
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Given that the vast majority of humans are right-handed, why is it that left-handedness -- of which President Barack Obama is a proud practitioner -- is still around?
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