Mplus 6.12 Base Program And Combination Add-on 〈RELIABLE • 2024〉

Standard multilevel handles nested hierarchies (students > classrooms > schools). But what about students who change schools over time? Or patients who see multiple doctors? Version 6.12’s Combination add-on supports (e.g., RANDOM | studentID and RANDOM | physicianID without a strict hierarchy).

Mplus Version 6.12, released by Muthén & Muthén, was a stable update within the Version 6 series. It offered expanded modeling capabilities and bug fixes relative to earlier 6.x releases. A key feature of Mplus licensing was the modular “add‑on” system. The and the Combination Add‑on represented two distinct tiers of functionality. Mplus 6.12 Base Program and Combination Add-on