Robert M. Yerkes

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Noun1.Robert M. Yerkes - United States psychologist who studied the intelligence of primates (1876-1956)
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Herbert Langfeld and Robert Yerkes, a Harvard psychologist who was also
Robert Yerkes' multiple-choice apparatus, 1913-1939.
Robert Yerkes, president of the American Psychological Association, develops the Army Alpha and Beta tests, a group intelligence test, to measure the intellectual capabilities of Army recruits as the country entered World War I.
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