Abstract: There is so far no scientific data concerning the distribution of left-andright-handedness in Chinese population.A survey of 18,593 healthy peopleand 1,748 neuropsychiatric patients was conducted througout the country.The sample of healthy people consisted of kindergarten,primary schoolmiddle school and college students,monozygotic and dizygotic twins,andvarious kinds of professionals.The handedness of seven minorities besides theHans were also surveyed.The data showed that the percentage of left-handedness was only 0.23％,far less then in western countries.

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