The Methodology Center distributes, free of charge, a suite of programs for LCA and LTA as add-on procedures for SAS.  These procedures, PROC LCA (for latent class analysis) and PROC LTA (for latent transition analysis), were developed for SAS Version 9.1 for Windows.  more about PROC LCA and PROC LTA

You can learn about LCA and LTA in this introduction and by reading material listed in a bibliography.  In addition, answers to frequently asked questions are available.

The Methodology Center also distributes WinLTA, a free-standing Windows application for LCA and LTA.  Although we no longer support this program, researchers without access to SAS may wish to download WinLTA free of charge.  more about WinLTA