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Re: how to calculate an effect size
There is a free shareware program called G power that can be found at
http://www.psycho.uni-duesseldorf.de/aap/projects/gpower/.
Once you install it you can calculate effect size, power and sample
size by plugging in any specifications you would like. I use it in my
classes and it is easy to use.
Best of luck,
Kim Rapoza
<p> </p><p>Todd McDonald
wrote:</p><p>-----------------------------------------------------------
-------------</p><table cellspacing="0" cellpadding="0" border="0"
><tr><td valign="top" style="font: inherit;"><DIV>I notice some of the
journal articles use very large samples. Is there a way to
calculate an effect size from a crosstabs table and a logistic
regression table? Is there a rule on what is considered a big
effect? </DIV>
<DIV> </DIV>
<DIV>TM</DIV>
<DIV> </DIV>
<DIV><BR> </DIV>
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Assistant Professor of Psychology
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