Date: Mon, 22 May 2006 17:14:25 -0400
Reply-To: "Zdaniuk, Bozena" <BZdaniuk@ucsur.pitt.edu>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "Zdaniuk, Bozena" <BZdaniuk@ucsur.pitt.edu>
Subject: effect size - correlation
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Hello, I assume that the squared coefficient of bivariate correlation
can be used as a measure of effect size, right? If this is the case,
could someone comment what would be considered a medium effect size for
a bivariate correlation in the behavioral sciences? I realize that for
tests based on means, the effect size of .5 is considered medium but for
a correlation that would mean a coefficient of .7 which is very rarely
found in beh. Science. Any comments, references would be greatly
Thanks a lot.