[R] post hoc statistical power

From: Yuelin Li <liy12_at_mskcc.org>
Date: Tue, 08 Apr 2008 12:47:12 -0400

I remember reading about post hoc statistical power on R-help. But I can't seem to find them with RSiteSearch("post hoc statistical power") and variations of it.

I would like to learn more about post hoc statistical power, its meaningfulness, advantages and disadvantages. I thought the issue was settled after Tukey's 1993 paper about post hoc statistical power being "essentially meaningless once the experiment has been done". But they seem to be used, and sometimes encouraged (e.g., http://www.informaworld.com/smpp/content~content=a787469931).

I do not intend to start a debate. I simply would like to learn more. Can anyone suggest a few articles? Thanks,


Tukey JW. Tightening the clinical trial. Control Clin Trials. 1993;14:266-285.  

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