James McKeen Cattell( American psychologist)
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Biography James McKeen Cattell
(25.05.1860 - 20.01.1944) - American psychologist, one of the founders of psychological testing. Student D. Lotze and B. Wundt. One of the first specialists in experimental psychology in America. Developed psychophysical method of paired comparisons. Worked as problems reaction time, association, attention, anticipation.