[R] Repeated measures ANOVA for unbalanc

Toth, Denes tdenes at cogpsyphy.hu
Thu Nov 21 23:21:28 CET 2013


The new lme4 package has a bootMer function, so it is fairly easy to
compute bootstrap statistics.
The following packages could be what you are looking for:
1) lmerTest (see ?lmerTest:::lmer)
2) car (see Anova)
3) afex (see mixed)
4) LMERConvenienceFunctions (see pamer.fnc)


> 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)
> Confidentiality Statement:
> This email message, including any attachments, is for ...{{dropped:13}}

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