

Growth for a repeated latent class me... 

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Jon Heron posted on Monday, August 04, 2014  2:56 am



Hi Bengt/Linda, I feel the answer is likely to be no, but is there any way of fitting an LCGA to a repeated latent class measure? I can fit a longitudinal LCA, I guess you'd describe it as a secondorder mixture model, but in my mind at least I have a repeated nominal (albeit latent) variable so am wondering about polynomial change with an LCGA. any thoughts? many thanks, Jon 


Technically, I think Mplus could do this, although not using the  construction  this is disallowed for reasons given below  but could be done using BY. The question is, however, what you would mean by growth in a (latent) nominal DV. For an ordered polytomous (ordinal) DV we have one slope when regressing the DV on say the slope growth factor, but with nominal we have C1 such slopes,so it's like having C1 growth curves. Perhaps an LTA with these latent nominal DVs would be more natural. 

Jon Heron posted on Tuesday, August 05, 2014  2:53 am



Thanks Bengt I hadn't thought past a binary I confess. I'm using a series of latent class variables along with logit constraints to adjust a repeated binary for known misclassification error. Ideally I would then fit an LCGA to my erroradjusted data. I have this working with LLCA, and in doing so have perhaps broken the record for output file length (~44,000 lines). Perhaps a UK record at least. best, Jon 

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