Date:  Tue, 16 Aug 2005 08:59:16 +0200 
ReplyTo:  Marta GarcíaGranero
<biostatistics@terra.es> 
Sender:  "SPSSX(r) Discussion" <SPSSXL@LISTSERV.UGA.EDU> 
From:  Marta GarcíaGranero
<biostatistics@terra.es> 
Organization:  Asesoría Bioestadística 
Subject:  Re: effect size form F and df 
InReplyTo:  <42FCC580.6030508@unm.edu> 
ContentType:  text/plain; charset=ISO88591 
Hi Matthew,
See the formula at:
http://www.lyonsmorris.com/MetaA/studyfx2.htm
I think it's the same you are using.
HTH
Marta
MP> I want to calculate cohen's d from and F and df. Does anyone know how
MP> to do this, or if it is possible?
MP> I was thinking that I could just use this equation, since F is just t
MP> squared. I could take the square root of the F and then run this
MP> syntax. Does that make sense?
MP> **
MP> *SPSS*:
MP> COMPUTE est_dbyt = (2 * t_value) / sqrt(df) .
MP> EXECUTE .
