Date:         Fri, 12 Aug 2005 09:51:28 -0600
Reply-To:     Matthew Pirritano <mpirrita@unm.edu>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Matthew Pirritano <mpirrita@unm.edu>
Subject:      effect size form F and df
In-Reply-To:  <42FCC32C.5010508@free.fr>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hello all,


I want to calculate cohen's d from and F and df.  Does anyone know how
to do this, or if it is possible?

I was thinking that I could just use this equation, since F is just t
squared.  I could take the square root of the F and then run this
syntax.  Does that make sense?


**

*SPSS*:

COMPUTE est_dbyt = (2 * t_value) / sqrt(df) .

EXECUTE .


Thanks
Matt

Matthew Pirritano, Ph.D.
National Science Foundation Post-Doctoral Fellow
College of Education
Department of Individual, Family & Community Education
MSC05 3040
1 University of New Mexico
Albuquerque, NM 87131-0001
Telephone (505)277-7115
FAX (505)277-8361