: An Package for Facilitating Large-Scale Latent Variable Analyses in .

is a package for that facilitates complex latent variable analyses in involving comparisons among many models and parameters. More specifically, provides tools to accomplish three objectives: to create and manage syntax for groups of related models; to automate the estimation of many models; and to extract, aggregate, and compare fit statistics, parameter estimates, and ancillary model outputs. We provide an introduction to the package using applied examples including a large-scale simulation study. By reducing the effort required for large-scale studies, a broad goal of is to support methodological developments in structural equation modeling using .