Rosenthal, RobertRubin, Donald2014-02-191982Rosenthal, Robert. 1982. "A Simple, General Purpose Display of Magnitude of Experimental Effect." Journal of Educational Psychology 74, no. 2, 166-169.0022-0663http://nrs.harvard.edu/urn-3:HUL.InstRepos:11718188We introduce the binomial effect size display (BESD), which is useful because it is (a) easily understood by researchers, students, and lay persons; (b) widely applicable; and (c) conveniently computed. The BESD displays the change in success rate (e.g., survival rate, improvement rate, etc.) attributable to a new treatment procedure. For example, an r of .32, the average size of the effect of psychotherapy, is said to account for "only 10% of the variance"; however, the BESD shows that this proportion of variance accounted for is equivalent to increasing the success rate from 34% to 66%, which would mean, for example, reducing an illness rate or a death rate from 66% to 34%.en-USJournal Article2014-01-29Rosenthal, Robert10.1037//0022-0663.74.2.166