To-do list

[Marcosjnez]

• Handle missing data.
• Partially oblique rotation with zeros in arbitrary positions.
• Implement the truncated Newton method for factor extraction.
• Develop alternative line-search methods (backtracking is the only one available right now).
• Manage empty cells in the contingency tables of the polychorics.
• Asymptotic covariance of the polychorics.
• Fix the standard errors for mixed criteria (arrange well the Hessian matrix).
• Information method for standard errors in maximum likelihood.
• Implement new factor extractions (GLS, DWLS, MINRANK, etc.)
• Omega reliabilities for bifactor models (done in R).
• Scaled fit indices.
• Confidence intervals for fit indices.
• Unbiased RMSR.
• Tetrads analysis (RMSR with tetrads; done in R).
• Expand bifactor:::CFA to bifactor:::SEM.
• ESEM.