Title: Re: Soda/obesity again.
I am surprised that some tipsters do not know what interaction
means. I taught research methods and statistics.There are main effects,simple effects ,and interaction effects.Obviously the fact that soda effects on females may hint at a gender effect,it can also be viewed as an interaction effect.Please note that one can have a significant interaction effect and no main effect.
Michael Sylvester,PhD
Daytona Beach,Florida

And this has  what to do with establishing causation?
The fact that two variables interact is a different statement, and still does not establish direction of effect.
-- 
The best argument against Intelligent Design is that fact that
people believe in it.

* PAUL K. BRANDON                    [EMAIL PROTECTED]  *
* Psychology Dept               Minnesota State University  *
* 23 Armstrong Hall, Mankato, MN 56001     ph 507-389-6217  *
*                http://krypton.mnsu.edu/~pkbrando/             *

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