How to extract SD for fixed effects in mixed models (using R, lmer)? I would like to have the standard deviation for the fixed effects output in R. By default, the lmer function from the lme4 library only gives me the standard error. Is there a way to achieve this?

(I (OP) wanted to reply to Shawn Hemelstrand, however I can no longer access the unregistered account).
Your answer helps me a lot. I was asked by a reviewer to include the SD as part of an initial data analysis. I assumed that there is a reason why the SD are not automatically output, but was unsure and tried to comply with the request, but could not find any corresponding approaches. Your explanation makes sense to me and underlines that it is not a common procedure. Thanks a lot!
