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ambidexterity
Ambidexterity is the state of being equally adept in the use of both left and right hand and use it at the same time.〔(ambidextrous - definition of ambidextrous in English from the Oxford dictionary )〕〔(Right, Left, Right, Wrong! - What is Handedness? )〕 Only about one percent of people are naturally ambidextrous.〔("Mixed-handed children more likely to have mental health, language and scholastic problems, study finds. " )〕 The degree of versatility with each hand is generally the qualitative factor in determining a person's ambidexterity.
In modern times, it is more common to find some people considered ambidextrous who were originally left handed and who learned to be ambidextrous, either deliberately or during childhood institutions such as schools, or jobs where right-handed habits are often emphasized or required. Since many everyday devices (such as can openers and scissors) are asymmetrical and designed for right-handed people, many left-handers learn to use them right-handedly due to the rarity or lack of left-handed models. Thus, left-handed people are much more likely to develop motor skills in their non-dominant hand than right-handed people (who are not subjected to left-favoring devices). Right-handers may become ambidextrous due to an injury of their right hand or arm. Ambidexterity is often encouraged in activities requiring a great deal of skill in both hands, such as knitting, typing on a computer, juggling, swimming, percussion, keyboard music, baseball, paintball, lacrosse, surgery, boxing, martial arts, Capoeira, Parkour, Association Football, and basketball.
== Etymology ==
The word "ambidextrous" is derived from the Latin roots ''ambi-'', meaning "both", and ''dexter'', meaning "right" or "favorable". Thus, "ambidextrous" is literally "both right" or "both favorable". The term ambidexter in English was originally used in a legal sense of jurors who accepted bribes from both parties for their verdict.〔1811 MMADEHof the Vulgar Tongue, page 12, ISBN 0-695-80216-X〕
The Latin word is derived from classical Greek roots from the word 'αμφι-δέξιος'
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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