Marley W. Watkins

This software is an effective statistical tool for research purposes.

alphaN is a Mac Universal application that calculates sample size for a specified coefficient alpha, based on Type I error rate and effect size. Developed using RealBasic.

MacMahalanobis is a Mac application that computes Mahalanobis distance for various cases when provided with an inverted covariance matrix. It is a standalone program designed using RealBasic.

MacOrtho is a Macintosh software that converts hierarchical higher-order factor analysis into an orthogonal solution, based on Schmid and Leiman's method. Developed using RealBasic, MacOrtho is a standalone application.

This software is a Macintosh Universal application that calculates effect sizes. It comes as a standalone tool.

rProphecy is a Mac application that calculates the reliability of a test with changed item numbers using the Spearman-Brown 'Prophecy' formula. It is a standalone software developed in RealBasic.

CAcalculator-Revised is a Macintosh tool that calculates chronological age based on the date of birth and test. The source code for the software is written in RealBasic, and it is a standalone application.

MacKappa software calculates general and partial kappa coefficients for nominal data on Macintosh. Its source code is written in RealBasic.