Hi everyone, 

                    I am currently running a mixed model on response type ("correct" or "incorrect") with the following model:

ModelAngel=lmer(response == "correct" ~ 1 + typeF * group + (1|subject), data=DatosAngel, family="binomial")

This works fine. 


I then try to run a multiple comparison on the results on the factor typeF with the following script: 


 glht(ModelAngel, linfct=mcp(grupo="Tukey"))



But when I do so, I get the following error message: 


In mcp2matrix(model, linfct = linfct) :
  covariate interactions found -- default contrast might be inappropriate


Can anyone help me with the meaning of this and how to solve it, please?

Thanks!
          Alejandro
	[[alternative HTML version deleted]]


