[R] How do I report coefficients of categorical fixed effects in a publication?
spencer.graves at pdf.com
Thu Mar 30 05:51:04 CEST 2006
Have you read Pinheiro and Bates (2000) Mixed-Effects Models in S and
S-Plus (Springer)? The figures and tables in this book should give you
some ideas that you can adapt to summarizing the results of fits to
If you've tried this and still have questions for this listserve,
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hope this helps,
Tracy Feldman wrote:
> To whom it may concern:
> I recently used lmer (for non-normally distributed data and mixed effects, using the Laplace method). All 3 of my fixed effects were categorical, including two ordered factors and one unordered factor. In my tables, I currently report the number of observations for the response variable, and both the degrees of freedom and Chi Square values from tests of reduced models against the full model.
> However, I would also like to include some indication of the magnitude and direction of the change in each fixed effect (and interaction effects) as a function of the response variable. Is this done with the "estimate +/- SE" of fixed effects in the summary of the fitted model? Either way, I am confused with how to report these effects succinctly, especially because for categorical variables, each category has its own estimated effect. What is a reasonable way to do this? Or should I just avoid it entirely?
> I really appreciate your time and help. Please reply to tracysfeldman at yahoo.com or tsfeldman at noble.org
> Tracy S. Feldman
> [[alternative HTML version deleted]]
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
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