same old question - lme4 and p-values
Google: p-values lmer wiki
On Apr 4, 2008, at 9:33 AM, Douglas Bates wrote:
---------- Forwarded message ---------- From: Douglas Bates <bates at stat.wisc.edu> Date: Fri, Apr 4, 2008 at 7:54 AM Subject: Re: same old question - lme4 and p-values To: andreas.nord at zooekol.lu.se On Fri, Apr 4, 2008 at 5:24 AM, <andreas.nord at zooekol.lu.se> wrote:
Dear Prof. Bates,
I've recently switched to using R for my analyses, and I find the
lme4 package to be extremely helpful. I have read your explanation (posted on the mailing list) of why you choose not to display p-values. Unfortunately, most of the journals I publish in require that I include p-values, which is why I have to find a way of calculating them from the lmer output. However, not being a trained statistician I have some difficulties following your recommendations given in the explanatory text. In other words, after having fitted my model, I am not at all sure on what to do in order to obtain p-values (or similar).
I am sorry to have to bother you with a question I know you have
already answered many times, but perhaps you would be so kind as to
give me some hints on how to proceed.
I understand your situation. Statisticians have created the "every
question of scientific interest must be answered by a p-value" monster
and now it turns on us. Nevertheless I am reluctant to give advice on
p-values in lme4 because apparently I don't know how to do it
correctly.
May I send a copy of this reply to the
R-SIG-Mixed-Models at r-project.org mailing list? ("SIG" == "Special
Interest Group")? (I ask your permission to send the copy because I am
quoting your original question.) Some who subscribe to that mailing
list may have the courage to wade into this swamp and offer their
advice.
_______________________________________________ R-sig-mixed-models at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
Dr. Hank Stevens, Associate Professor 338 Pearson Hall Botany Department Miami University Oxford, OH 45056 Office: (513) 529-4206 Lab: (513) 529-4262 FAX: (513) 529-4243 http://www.cas.muohio.edu/~stevenmh/ http://www.cas.muohio.edu/ecology http://www.muohio.edu/botany/ "If the stars should appear one night in a thousand years, how would men believe and adore." -Ralph Waldo Emerson, writer and philosopher (1803-1882)