Multivariate Effect Size Syntax for multivariate statistical effect size estimation through multiple comparisons. Alpha S.E. Standard error estimates for Cronbach's Alpha adapted from Duhachek, A. & Iacobucci, D. (2004). Regression Diagnostics Syntax to produce comprehensive univariate multiple regression diagnostics.	IRT Macro Excel macro producing ICCs, IICs, the TIC etc. from calibrated item parameters. Matrix Algebra Sheet Spreadsheet demonstrating matrix operations (with the respective functions) in Excel.	rela Scale item reliability analysis with standard errors. cat.boot Categorical data bootstrap with missing data package. pro.cor Assessment of GIS estimations across varying projections. irt.diag IRT model fit diagnostic package.	Alpha S.E. SAS syntax for standard error estimation for Cronbach's Alpha by Duhachek, A. & Iacobucci, D. (2004). More soon...