Calculates positive predictive power, given prevalence and test results. Platforms: Mac

Standard Score Converter converts raw scores to standard scores and converts between standard scores, including z, T, deviation IQ, NCE, percentile, etc. Platforms: Mac

Calculates three indices of factorial invariance: the coefficient of congruence, a chi-square goodness of fit test, and Cattell's Salient Variable Similarity Index. Platforms: Mac

Interactively simulates how the 95% confidence interval and statistical significance of the correlation coefficient vary as a function of sample size. Platforms: Mac

Estimates the sample size needed for a specified coefficient alpha, given the Type I error rate and effect size. Platforms: Mac

ProbabilityCalc calculates the probability of z, t, F, and chi-square values. Platforms: Mac

rProphecy uses the Spearman-Brown prophecy formula to calculate the reliability of a test if items are added or deleted. Platforms: Mac

rDiff calculates the reliability of difference scores given the reliability of two tests and the correlation between those two tests. Platforms: Mac

PairwiseTests calculates three pairwise tests to control experimentwise error rates: simple Bonferroni, Holm's sequential Bonferroni, and Benjamin & Hochberg's False Discovery Rate. Platforms: Mac

Simple-t calculates independent and dependent t-tests from group data (means, standard deviations, etc.). Platforms: Mac

Generates random numbers from uniform and normal distributions. Platforms: Mac

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. Platforms: Mac

Calculates diagnostic efficiency statistics: sensitivity, specificity, true and false positive rates, odds ratio, kappa, etc. Platforms: Mac

Calculates the coefficient of congruence for comparing factor solutions from different studies or different samples Platforms: Mac

OBE Assistant is a tool to help produce formative assessment tasks in Outcomes Based Education (OBE). It has been developed for use with the OBE system implemented by the Curriculum Council of the Western Australian government. The main idea with OBEA is to assign numerical marks to questions and... Platforms: Mac

PoeteX is intended for management of educational scheduling and generation of printable timetables. On the one hand you'll organize groups of student into an inclusion hierarchy and associate to them a course plan required to validate a given diploma. You'll also define various intervenors (say... Platforms: Mac

Crittersim is a simulation program that runs a section of a virtual world. There are plants and animals and some semblance of natural selection going on. This includes the most fundamental pieces for a simulation. This interactive simulation will hopefully entertain the curious.In it you can... Platforms: Mac

WorldViewer allows you to see the world on your desktop with realtime cloud maps, recent earthquakes, current tropical storms, and your local weather forecast.Features:Plots all recent 5.0 magnitude and greater earthquakesPlots tropical storms, their paths and projected paths color coded by storm... Platforms: Mac

flexCard is a new take on flash card management. Dealing with a large and varied deck has never been easier.Intuitive searching and sorting: Quickly find the flash cards you wish to review. Need to review all of the verbs introduced in chapter 10 for an upcoming language test? Select chapter 10... Platforms: Mac

nsMorseTutor is a simple application designed to assist with learning morse code on Mac OS X. It supports Farnsworth and Koch style learning methods, as well as supporting a number of different practice modes. nsMorseTutor is fully functional for 30 days. After 30 days if you have not registered... Platforms: Mac