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Published by: University of Illinois Press
Stable URL: http://www.jstor.org/stable/1412159
The Proof and Measurement of Association between Two Things
The American Journal of Psychology
,
Vol. 15, No. 1 (Jan., 1904), pp. 72-101
Published by: University of Illinois Press
Article Stable URL: http://www.jstor.org/stable/1412159