Hi all- New to R, and I've managed to learn a bit about Lavaan package for SEM, and pscl package for analyzing count data. I would like to find a way to combine these analyses as I am hoping to run a model with a multi-trait, multi-reporter factor (2 reporters by 4 traits apiece, with one overall factor to represent common variance) as a predictor, and predict (zero-inflated) count substance use outcomes. Do people have any suggestions for how to do this? It seems that Lavaan can't handle count data, and I don't know if there is a count data package that can handle SEM models. I'm thinking I may have to do a two-step process and run SEM package to get factor scores, and then put in as a predictor in count outcomes package. Thanks! Rick [[alternative HTML version deleted]]