Whilst conducting a LCA, I wonder now, how many groups, I should go for. Firstly, I know, I should run the LCA with different kind of starting seeds and compare the results. When I compare them, I look on 'results of best solution'. I look on AIC, CAIC, BIC and Percent Certainty. And my AIC, CAIC, BIC drop with a single group more and at the same time my Percent Certainty goes up. As too many groups are from an economical view not good to analyse, I need to think of a solution with no more than, let's say 5 groups. Now, my questions are:
- What pararmeter is most important? AIC, CAIC, BIC, Percent Certainty? Plus any advice on papers for the problem? Or a hint, how to find a solution?
- In terms of growth, is there a rule of thumb, which says a growth of less than 5% whatever for AIC is not much and thus, I can go for less groups?
- What number of percent certainty is desired? Which percentage is okay for segmentation?
- My average respondent probability is around 95% - can I consider that as a good model fit?
Thanks a lot!