All posts by Mathilda du Toit

Announcing the Release of AUXAL 4

A new version of the AUXAL program is immediately available for purchase. Auxal4 uses the same empirical Bayes estimation procedure as AUXAL3, but has new features and improvements that extend the functionality of the program and make it easier to use.  The accuracy of the estimated population covariance matrix of the model parameters has been improved. Although archival of data from the Fels longitudinal study continues as the source of the default prior distribution means and covariance matrices for the … Read More

Announcing the Release of BILOG-MG 4

A new version of the BILOG-MG program is immediately available. New features Executables for running the Classical Statistics, Calibration and Scoring phases have been replaced with 32bit and 64bit dynamic link libraries. The GUI determines if the computer uses a 64bit or 32bit processor. The number of examinees in a dataset has been increased from 1 million to ten million. The maximum length of all file names has been changed from 128 to 256 characters. This “feature” is only useful … Read More

Announcing the release of SuperMix

A new version of the SuperMix program is immediately available. Use of Stat/Transfer Version 15 The data import feature has been upgraded from Stat/Transfer Version 14 to the most recently released Version 15 to ensure import/export compatibility with software packages such as SPSS, SAS and STATA. Among others, Stat/Transfer supports importing data from the most current SAS, SPSS, STATA, MINITAB, MATLAB and R software. Dynamic link libraries Executables have been replaced with 32bit and 64bit dynamic link libraries. The GUI … Read More

Announcing the release of PARSCALE 5

A new version of the PARSCALE program is immediately available. New features The number of examinees in a dataset has been increased from 1 million to ten million. The maximum length of all file names has been changed from 128 to 256 characters. This “feature” is only useful if the DLL can handle syntax file with directory. Currently the UI break the full path into <drive>/<dir> and <filename>, change the current working directory to <drive>/<dir> and call the BLM.exe with … Read More

Introducing New Features in HLM 8

The HLM8 program has a number of new statistical features. Estimating HLM from incomplete data In HLM 8, the ability to estimate an HLM from incomplete data was added. This is a completely automated approach that generates and analyses multiply imputed data sets from incomplete data. The model is fully multivariate and enables the analyst to strengthen imputation through auxiliary variables. This means that the user specifies the HLM; the program automatically searches the data to discover which variables have … Read More

Introducing New Features in LISREL 10

The LISREL10 program has a number of new statistical features. Structural equation modeling (SEM) was introduced initially as a way of analyzing a covariance or correlation matrix. Typically, one would read this matrix into LISREL and estimate the model by maximum likelihood. If raw data was available without missing values, one could also use PRELIS first to estimate an asymptotic covariance matrix to obtain robust estimates of standard errors and chi-squares. Modern structural equation modeling is based on raw data. … Read More