January 5, 2015
Do Left-Handed People Have a Disadvantage?
Left-handed people (some 12% of the population) have 10% to 12% lower annual earnings than righties, on average, in part because they score 0.1 of a standard deviation lower on measures of cognitive skill and have more emotional and behavioral problems, writes Joshua Goodman of Harvard Kennedy School, who studied five large datasets of people in the U.S. and UK. Past research suggests that handedness has both genetic and environmental origins: Stressors during pregnancy or birth may contribute to the differential brain structures typical of left-handed individuals. Goodman asks whether schools could tailor their curricula in such a way as to provide greater benefits to left-handed children.
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