Software Developed by Marley Watkins
RProphecy v.2.0
rProphecy uses the Spearman-Brown prophecy formula to calculate the reliability of a test if items are added or deleted.
ROC Analysis v.1.4
ROC Analysis is a tool for graphing the Receiver Operating Characteristic (ROC) curve and calculates the Area Under the ROC Curve (AUC) using a nonparametric method.
R/z Conversion v.1.3
Converts between correlation coefficient and Fisher's z.
ProbabilityCalc v.2.0
ProbabilityCalc calculates the probability of z, t, F, and chi-square values.
PairwiseTests v.1.5
PairwiseTests calculates three pairwise tests to control experimentwise error rates: simple Bonferroni, Holm's sequential Bonferroni, and Benjamin & Hochberg's False Discovery Rate.
Monte Carlo PCA for Parallel Analysis v.2.0.3
Computes Parallel Analysis criteria (eigenvalues) for determining the number of factors to retain for rotation in factor analysis.
MacPotthoff v.2.1
Simultaneous and separate tests of regression slopes and intercepts for test bias analysis.
Invariance v.2.0
Calculates three indices of factorial invariance: the coefficient of congruence, a chi-square goodness of fit test, and Cattell's Salient Variable Similarity Index.
Coefficient of Congruence v.1.2
Calculates the coefficient of congruence for comparing factor solutions from different studies or different samples.