Regression away from the mean: Theory and examples

Using a standard repeated measures model with arbitrary true score distribution and normal error variables, we present some fundamental closed-form results which explicitly indicate the conditions under which regression effects towards (RTM) and away from the mean are expected. Specifically, we show that for skewed and bimodal distributions many or even most cases will show a regression effect that is in expectation away from the mean, or that is not just towards but actually beyond the mean. We illustrate our results in quantitative detail with typical examples from experimental and biometric applications, which exhibit a clear regression away from the mean (‘egression from the mean’) signature. We aim not to repeal cautionary advice against potential RTM effects, but to present a balanced view of regression effects, based on a clear identification of the conditions governing the form that regression effects take in repeated measures designs.     

Turning the Tables with 'Homophobia'

The charge of homophobia, indiscriminately made in a large part of our Western culture today, is ill conceived, illogical and false. This sweeping charge may be pictured as a triangle of informal logical fallacies. The more prominent side, the one which the general public encounters first, is what I shall call the fallacy of turning the tables : the rhetorical device of making the source of criticism the object of criticism. The other side of the charge is the fallacy of equivocation . The boundary of the term 'homophobia' is made so elastic that it can stretch around, not just phobias, but every kind of rational fear as well; and not just around every kind of fear, but also around every critical posture or idea that anyone may have about the practice of homosexuality. At the base of the charge, and undergirding the other two fallacies, is the fallacy of begging the question . A commitment to the complete acceptability of the practice of homosexuality enables its proponents to 'know' beforehand that all criticisms against it must originate in the defective psychology of the critic.