GLAMM

Author: Sophia Rabe-Hesketh, Anders Skrondal, and Andrew P
Contact: http://www.gllamm.org/
Description: GLLAMMs are a class of multilevel latent variable models for (multivariate) responses of mixed type including continuous responses, counts, duration/survival data, dichotomous, ordered and unordered categorical responses and rankings. The latent variables (common factors or random effects) can be assumed to be discrete or to have a multivariate normal distribution. Examples of models in this class are multilevel generalized linear models or generalized linear mixed models, multilevel factor or latent trait models, item response models, latent class models and multilevel structural equation models.
Analyses: Item & Test Analysis; Multilevel Data; Reliability
System Requirements: STATA
Measurement Model: IRT/Rasch
License Type: Freeware
Documentation: free manual, sample data, and worked examples