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Guy Montrose Whipple(1876-1941) a pioneer in
psychology…

GUY MONTROSE WHIPPLE (1876-1941) was a pioneer in developing tests
that measured human ability, including intelligence and personality. His
landmark book, Manual of Mental and Physical Tests, published in 1910,
described more than 50 such tests. Inspired by another testing pioneer,
Francis Galton, cousin of Charles Darwin, Whipple included a broad range
of tests in his manual, including inkblots and tests for such odd things
as aiming, tracing, steadiness and even tapping.

Whipple was a stickler for standards and, in a bold speech before
the American Psychological Association in 1915, he warned about
"charlatans" who administer and interpret psychological tests without
adequate expertise. As a result, seven years later, the APA issued its
first set of standards for professional psychological testing.

Whipple worked with notable psychologists, including Louis Terman
and Robert M. Yerkes, to develop an IQ test that was used to evaluate
more than 1 million U.S. servicemen in World War I.