I am doing a path analysis with only observed variables. My independent and dependent variables are continuous, but I have two mediators that are ordered categorical with 3 and 7 categories, respectively. The mediators are coded 1-3 and 1-7, respectively.
When interpreting the output, I assumed that the reference category was 1, but now I have read in many other answers here in Mplus discussion that the last category is the reference category - at least when the dependent variable/mediator is nominal.
Is this also the case when the dependent variable/mediator is ordinal? Or is the reference category the first category?