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Mplus Discussion > Growth Modeling of Longitudinal Data >
 Jon Heron posted on Monday, February 29, 2016 - 1:48 am
Hi Bengt/Linda

I've been trying to find some information about TSCORES in the technical appendices but with no success.

can you point me towards any additional info other than what's in the manual?

many thanks, Jon
 Linda K. Muthen posted on Monday, February 29, 2016 - 4:49 pm
I don't think we have anything further.
 Jon Heron posted on Tuesday, March 01, 2016 - 1:24 am
that's a shame

is there anything more general? I'm assuming that "tscores" is an Mplus term but the method started out called something else, perhaps in a JASA paper?

best wishes, Jon
 Bengt O. Muthen posted on Tuesday, March 01, 2016 - 5:41 pm
No, I haven't seen this done elsewhere. It is providing the flexibility that the usual repeated measurement software have with individually-varying times of observations in a long format, 2-level approach to growth modeling - but doing this in a single-level model in the more flexible wide format. So getting a random slope for a random time variable. I guess that is pretty unique and maybe we should have written about it to tout it.
 Jon Heron posted on Tuesday, March 01, 2016 - 11:56 pm
Thanks Bengt

I am contemplating adding this to a growth modelling lecture I am writing so wanted to make doubly-certain I understood what was happening.

Is that the nub of the issue, it's treating age as a time-varying covariate with a wave-invariant random effect on the repeated measure.
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