I ran the model:
lmer11 <- lmerTest::lmer(duration ~ (1|piece) + (1+color|speaker) + group*color*sex, data=data1.frame, REML=FALSE, na.action=na.omit)
The output is similar to lmer. I do not understand as I run the same syntax structure of other models, and it works fine. Do you have any idea why lmerTest does not give me p-values for this model?