I have conducted a latent class growth analysis and the best fitting model indicates the existence of three separate trajectories differing in i, s, and q growth factor. Now I would like to test whether this model fits equally well for boys and girls. In other words I need to test whether a three trajectory class model fits equally well for boys and girls and if so, whether the intercepts and growth factors differ by gender. Could you give me a tip on how to conduct the multigroup analysis?
Jon Heron posted on Thursday, May 20, 2010 - 2:49 am
you want to use the KNOWNCLASS option. Check out example 8.8 (p216 in the v6 guide)
best wishes, Jon
Amy Tobler posted on Thursday, September 02, 2010 - 7:38 am
We have a situtation where we wish to compare the growth rates between two groups (control and experimental) and we had thought to run this as a multigroup growth model. We also have multilevel data (students nested within school units). We tried the following code: