Testing Quasi-Causal Hypotheses Using Multivariate Twin Data
نویسنده
چکیده
I find the use of a correlation coefficient a dangerous symptom. It is an enemy of generalization, a focuser on the “here and now” to the exclusion of the “there and then.” Any influence that exerts selection on one variable and not the other will shift the correlation coefficient. What usually remains constant under such circumstances is one of the regression coefficients. If we wish to seek for constancies, then, regression coefficients are much more likely to serve us than correlation coefficients. (Tukey, 1969, p. 89).
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