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Arthur Sinton Otis (28 July 1886-1 January 1964) was an American psychometrician who built on the work that Roger Thomas Lennon did developing intelligence measures for the army (group-administered tests titled the Army Alpha (for literates) and the Army Beta (for illiterates). Otis developed it to improve cost and time efficiency as compared to one developed by Alfred Binet (1857–1911), which was individually administered. Given in multiple-choice format and administered in groups, 1.7 million World War I recruits took the Army Alpha test. The results were published in 1921 and included the relative performance of recruits of different national origins.