I'm trying to conduct Associative Latent Transition Analysis in Mplus, in which I want to jointly condition class membership of some outcome latent class (C) at time t+1 on class membership in some predictor latent class (D) at t+1, as well as class membership for both the outcome and predictor latent classes at time t.
Here is my attempt:
c2#1 on d2#1 d2#2 d1#1 d1#2 c1#1 c1#2; c2#2 on d2#1 d2#2 d1#1 d1#2 c1#1 c1#2;
I am trying to do an ALTA in MPlus. I need to fix certain latent status patterns to zero in the ALTA since very few people have these patterns as their most likely latent statuses.
I've got two time points for each LTA: c1 and c2 with 4 classes, d1 and d2 with 3 classes. I would like to set all associations with d1#3 and c1#1 to zero but since the last class (class 3) of the d1 variable is the reference class, I get an error saying that "references to slopes of the last class are not allowed". I would also like to set certain associations involving a specific combination of all 4 latent variables to zero.
I tried PARAMETERIZATION = PROBABILITY but that does not allow me to regress a latent variable on more than one variable as needed for an LTA (c2 on c1; d1 on c2 c1; d2 on d1 c2 c1;). Please let me know if you have any ideas on how I can set associations involving the reference class of one of the latent variables to zero. Thanks for your help.