Do I have to cite ‘lme4’ when using ‘lmerTest’?

I am using lmerTest to run linear mixed models (LMM) to get the p-values. However, in the articles I have written, they will show both lme4 and lmerTest. Then I am not sure if I also have cite lme4 when I use only lmerTest to run LMM models.

Do you have any idea about this?

Answer

lmerTest basically offers a bunch of convenience functions on top of lme4. The actual important software is lme4, which implements the model framework. You should definitely give the reference for lme4 as specified in citation("lme4"):

Douglas Bates, Martin Maechler, Ben Bolker and Steven Walker (2014).
lme4: Linear mixed-effects models using Eigen and S4. R package
version 1.0-6. http://CRAN.R-project.org/package=lme4

This is not only important for giving well deserved attribution, but also to state the lme4 version number.

Attribution
Source : Link , Question Author : user3288202 , Answer Author : Roland

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