Re: Rule of Thumb for Partial Eta Square

Posted by ANDRES ALBERTO BURGA LEON on Mar 25, 2015; 3:13pm
URL: http://spssx-discussion.165.s1.nabble.com/Rule-of-Thumb-for-Partial-Eta-Square-tp5729057p5729059.html

Hello:

Ferguson, C. J. (2009). An effect size primer: a guide for clinicians and researchers. Profesional Psychology : Research and Practice, 40(5), 532-538.

He suggest small .04, moderate .25 and strong .64.

Kindly

Andres

Enviado desde mi Samsung Mobile de Claro

-------- Mensaje original --------
De: Salbod <[hidden email]>
Fecha:25/03/2015 10:05 AM (GMT-05:00)
A: [hidden email]
CC:
Asunto: Rule of Thumb for Partial Eta Square

Is there a standard small, medium, and large values for partial eta squared
in a factorial ANOVA?
I wasn't able to find them in Cohen's power analysis book (1988) nor was I
able to find a reference on this site.

I took some data (2 X 2) that accompanied (Chapter 9) Cohen, Cohen, West,
and Aiken's book. The data shows three types of interactions (I used YC). I
analyzed the dataset using Regression(Linear): contrast coding and ZPP.  I
analyzed the same dataset using ANOVA, requesting ETASQ.  I found the
squared partial rs to approximate the partial eta squares. Does that imply
that I can use Cohen's r effect sizes?

Any suggestions are most welcome.

TIA, Stephen Salbod, Pace University, NYC
 
CohenData.sav
<http://spssx-discussion.1045642.n5.nabble.com/file/n5729057/CohenData.sav> 









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