Mikhail Saltychev

5 Questions 20 Answers 0 Followers

Questions related from Mikhail Saltychev

Group-based trajectory analysis "traj" in Stata - storing output data?

I am using "traj" module in Stata. What would be the right way to store the data for further use. I mean, in SAS it is something like this: PROC TRAJ DATA=A OUT=OF OUTPLOT=OP OUTSTAT=OS But what...

05 October 2016 4,651 7 View

Need an easy explanation for the different models in group-based trajectory modelling (GBTM)?

I am trying to study group-based trajectory modelling (GBTM). Please, notice that I am not a statistician. I have installed in Stata the module “traj” that is the same module as one for SAS. There...

11 September 2016 7,976 5 View

One constraint is still missing in second order confirmatory factor analysis (Amos)?

I have a message in Amos "In order to achieve identifiability, it will probably be necessary to impose 1 additional constraint." Please, see the diagram. What am I missing? I'd appreciate any hint.

09 May 2016 8,936 9 View

Any tips on using Item response theory (IRT) in Stata 14 on repeated measures data?

The cross-sectional IRT analysis in Stata 14 is quite simple. But what about longitudinal data / repeated measures? I just don't know where to start from. I would really appreciate if somebody can...

14 November 2015 9,895 3 View

How do I use ANCOVA for meta-analysis?

Trying to conduct a meta-analysis using post-test values from several studies with two independent groups (cases/controls). There are pre-/post-test means and SDs. What I'm looking for, are tips...

25 December 2014 7,107 10 View