effect size: eta-squared vs partial eta-squared

Posted by Dogan, Enis on Jul 18, 2006; 5:54pm
URL: http://spssx-discussion.165.s1.nabble.com/effect-size-eta-squared-vs-partial-eta-squared-tp1069749.html

Dear all

 

SPSS reports partial et-sq as opposed to eta-squared.

I found in the literature the rule thumb for eta-squared as small
(0.01), medium (0.06), and large (0.14) (Cohen, 1988).

Does this apply to partial eta-squared as well?

Also, the definition of eta-squared gives me the idea that it is no
different than what some of us call partial R squared.

Am I right?

 

There is rumor out there that "researchers erroneously report partial
eta-squared values as representing classical eta-squared values"

http://carbon.cudenver.edu/~haguinis/APMinpress.pdf

 

Any value in this argument?

 

Thanx

 

Enis