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Stephen Murdoch, author of IQ: A Smart History of a Failed Idea, talks about how IQ tests were used as the basis of eugenics programs in Nazi Germany and early 20th century America.
Stephen Murdoch explains that IQ tests used by the army during World War I were the birth of objective, multiple choice tests like the SAT or GRE used today.
Stephen Murdoch, author of IQ: A Smart History of a Failed Idea, describes how doctors on Ellis Island used IQ tests to screen non-English speaking immigrants based on their IQ scores.