Date:         Mon, 28 Jan 2008 08:19:53 -0800
Reply-To:     SR Millis <srmillis@yahoo.com>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         SR Millis <srmillis@yahoo.com>
Subject:      Re: CALCULATION FOR SAMPLE SIZE
Comments: To: SoS Statistical Services <sos_stats@yahoo.co.uk>
In-Reply-To:  <129035.12045.qm@web23413.mail.ird.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1

Post hoc power analysis is not recommended. See:

Hoenig, J. M., & Heisey, D. M. (2001). The abuse of
power: The pervasive fallacy of power calculations for
data analysis The American Statistician, 55(1), 19-24.

SR Millis

--- SoS Statistical Services <sos_stats@yahoo.co.uk>
wrote:

> I find Minitab easier to use than GPower for sample
> size/power calculations. Sara, how do you do
> post-hoc power analysis using SPSS?
>
>   Thanks
>


Scott R Millis, PhD, MEd, ABPP (CN,CL,RP), CStat
Professor & Director of Research
Dept of Physical Medicine & Rehabilitation
Wayne State University School of Medicine
261 Mack Blvd
Detroit, MI 48201
Email:  smillis@med.wayne.edu
Tel: 313-993-8085
Fax: 313-966-7682

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