Ordinal variable used as random effect

anne_sa

Hello everyone,

I was trying to build a model with a random effect which is an ordinal variable.

However I got the following alert:

Does it mean that it is impossible to choose an ordinal variable for a random effect or is my variable an exception?

Thanks in advance for your answers.

jiancao

No, it does not take an ordinal variable as an random effect; it only accepts a nominal variable as a random effect.  (The Random Effects tab in Mixed Model personality is used to specify a variance component model or random coefficients model, while Attributes> Random Effect available in Standard Least Squares personality supports variance component models only.)