Like Harold, I have also used simulation-based methods for power analyses, which I discuss (briefly) in the following article (with R code in an appendix):
Atkins, D. C. (2005). Using multilevel models to analyze marital and family treatment data: Basic and advanced issues. Journal of Family Psychology, 19, 98-110. However, depending on the nature of your design, it could be far easier to use Steve Raudenbush's Optimal Design software with menus and GUI, downloadable at: http://sitemaker.umich.edu/group-based/optimal_design_software cheers, Dave -- Dave Atkins, PhD [EMAIL PROTECTED] From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Julien Sent: Wednesday, April 04, 2007 10:40 AM To: r-help at stat.math.ethz.ch Subject: [R] Power analysis and mixed model Hi Is there any way to compute power analysis for a mixed model ? Julien Julien Martin Candidat au Doctorat Laboratoire de Marco festa-Bianchet Universiti de Sherbrooke Sherbrooke, Quibec J1K 2R1 Canada 819 821 8000 poste 62059 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
