In a world dominated by right-handed people, International Left Handers Day, which is celebrated annually on Aug. 13, affords the roughly 10% of Americans who are left-handed a day of recognition.

Left-handedness is often seen as being "wrong" – and also as a sign of "genius". Shih-Ching Tsou's drama, Left-Handed Girl, draws on the prejudice she faced as a leftie in Taiwan. In the acclaimed new ...