Robert Yerkes Conducted IQ Tests with Army Recruits for World

Robert Yerkes conducted IQ tests with army recruits for World War I.His study found that:

A) the IQ test was biased towards ethnic minorities
B) immigrants could be ranked by IQ scores according to their country of origin
C) the average mental age of White American adults was 25 years, indicative of superior intelligence
D) the use of minimal intelligence scores for occupations was inappropriate

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