Software Listing of Author : "Marley Watkins"

Ability-Achievement Discrepancy Analysis is a handy and easy to use application designed to help users to calculate simple regressions.

Ability-Achievement Discrepancy Analysis is a standalone Windows program that performs a simple regression-based prediction of achievement for determination of a severe ability-achievement discrepancy.

  • Platform: WinOther

ChiSquareDiff is a compact application designed to calculate the statistical significance of Chi-Square difference tests. The program features an easy to use interface that allows you to choose the Chi-Square type and to enter the parameters.

The results of the calculation are displayed in the same window that allows you to paste values from other data sources.


  • Platform: WinOther

CIeigenvalue is a small, simple, easy to use application specially designed to help you compute the confidence intervals of obtained eigenvalues as per Larsen and Warne.

For eigenvalues, Larsen and Warne suggested that CIs for eigenvalues can serve as an enhancement to traditional methods (scree, parallel analysis) in order to determine the number of factors to retain.
for WindowsAll

  • Platform: WinOther

You can use the Effect Size Calculator application if you want to calculate standard deviations and effect sizes.

By using Effect Size Calculator you are able to specify the standard deviation of control grop and the number of subjects and calculate the mean difference and the Glass's coefficient.

  • Platform: WinOther

MacBonferroni is a standalone Windows program that calculates Holm's sequential Bonferroni method to maintain experimentwise error rates at a desired alpha level.

This program calculates a modified Bonferroni method proposed by Holm (1979) that is more powerful than the traditional Bonferroni approach but maintains experimentwise error rate.

  • Platform: WinOther
  • MacRCI
  • License: Shareware
  • Price:

MacRCI is a useful and reliable application which uses the clinical group standard deviation to calculate the standard error in the RCI formula. MacRCI is a standalone Windows program that calculates the Reliable Change Index (RCI) of Jacobson and Truax (1991).

Before you begin, you have to specify indicators such as the standard deviation, the clinical population and the reliability.

  • Platform: WinOther

Pairwise Multiple Tests is a useful application that calculates three Pairwise Tests such as simple Bonferroni adjustment, Holm's sequential Bonferroni method, and Benjamin and Hochberg's False Discovery Rate.

Press the Return key after each p value. The Pairwise Multiple Tests program will sort the p values from smallest to largest and calculate the sequential critical test value and FDR value for each.

  • Platform: WinOther

Reliability of Difference Scores is a small, easy to use application specially designed to help you calculate the reliability of difference scores, given the reliability of two tests and the correlation between those two tests.

A difference score is obtained by subtracting one test score from another test score. For example, a student's IQ test score and Reading test score. This might be interpreted as the difference between ability and achievement.

for WindowsAll

  • Platform: WinOther

ROC Analysis is a standalone Windows program that graphs the Receiver Operating Characteristic (ROC) curve and calculates the Area Under the Curve (AUC) using a nonparametric method.

ROC Analysis is a handy application designed to produce quantitative and visual representations of the diagnostic utility of a test across its entire range of cut scores.

These methods are insensitive to prevalence of the diagnosis and are independent of the decision criterion. ROC Analysis is a REALbasic program that calculates and graphs the nonparametric ROC.

  • Platform: WinOther

SimpleStatTests is a small, easy to use application specially designed to offer you a tool to help you calculate tests of dependent and independent means, variances, correlations, proportions, alpha coefficients, and AUCs from group data.
for WindowsAll

  • Platform: WinOther

Standard Score Converter is a useful application designed to help users convert raw scores to standard scores.

This program can calculate a variety of standard scores if given an obtained score and its distribution's mean and standard deviation. Alternatively, a variety of standard scores can be calculated from any other score.



  • Platform: WinOther

Watkins Random Number Generator is a handy tool that allows you to generate multiple random numbers within a certain interval. The Uniform method allows you to specify the interval nd the number of items.

The Gaussian method can be used for experiments since the program only generates numbers between -1 and 1. The numbers can be pasted in other applications or used for experiments.


  • Platform: WinOther
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