NEWS

---

bifactory 0.5.0

• Initial CRAN submission.

Features

• Bifactor ESEM (B-ESEM), standard ESEM, and CFA for continuous and ordered-categorical data.
• Continuous models via 'lavaan' native efa() blocks (MLR).
• Ordered-categorical ESEM via 'lavaan' WLSMV; ordered B-ESEM via a custom diagonally weighted least squares (DWLS) path with polychoric correlations from 'psych', rotation-delta standard errors via 'numDeriv', and mean-and-variance-adjusted chi-square.
• Target, geomin, and oblimin rotations via 'GPArotation'; the bifactor ESEM approach follows Morin, Arens and Marsh (2016).
• Multi-group measurement invariance (configural through strict, with partial invariance), ESEM-within-CFA conversion, McDonald's omega reliability suite, and the Mehrvarz and Rouder (2026) alignment-ratio check for ICM-CFA misspecification.
• Optional side-by-side comparison with Mplus output via 'MplusAutomation'.