[R] Repeated measures ANOVA for unbalanc

Bert Gunter gunter.berton at gene.com
Thu Nov 21 23:25:14 CET 2013

Well ...

1. Try the latest version of lmer/lme4 and see for yourself. I think
the answer is still no.

2. If 1 is true, then I think you need to ask whether you **want** to
use a package that returns p values and se's, whether it exists or


On Thu, Nov 21, 2013 at 2:07 PM, John Sorkin
<JSorkin at grecc.umaryland.edu> wrote:
> R 3.0.1
> Windows 7
> Rstudio 0.97.551
> Colleagues,
> The last time I thought about using lmer to run an unbalanced repeated measures ANOVA, I found that the package did not return p values or SEs. I believe this was because Professor Bates had important questions about the theory behind the required computations and was in the process of developing a new, improved algorithm. Has this situation changed? Has Prof. Bates, or anyone else, implemented a repeated measures ANOVA package for R that can be perform unbalanced repeated measures ANOVA and which produces valid p values and SEs? If so, what is the name of the package?
> Thank you,
> John
> John David Sorkin M.D., Ph.D.
> Professor of Medicine
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology and Geriatric Medicine
> Baltimore VA Medical Center
> 10 North Greene Street
> GRECC (BT/18/GR)
> Baltimore, MD 21201-1524
> (Phone) 410-605-7119
> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
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