ViSta-CITA (Classical Item and Test Analysis) is a module included in the Visual Statistics System (ViSta) that focuses on graphical-oriented methods applied to psychometric analysis.
TAP (the Test Analysis Program) is a free program for basic classical analysis developed by Gordon Brooks at the University of Ohio. Complete details, supporting documentation, sample datasets, and free student versions may be found at Curtin's Lertap site. Lertap was developed by Larry Nelson at Curtin University of Technology commercial versions are available from Assessment Systems Corporation. Lertap will produce ASCII data files ready for input to XCALIBRE and Bilog MG. Mantel-Haenszel methods are used graphs of results are provided. It includes test, item, and option statistics, classification consistency and mastery test analysis, procedures for cheating detection, and extensive graphics (e.g., trace lines for item options, conditional standard errors of measurement, scree plots, boxplots of group differences, histograms, scatterplots).ĭIF, differential item functioning, is supported in the Excel 2007 version of Lertap.
Lertap (Laboratory of Educational Research Test Analysis Program) is a comprehensive software package for classical test analysis developed for use with Microsoft Excel. It is only available from Assessment Systems Corporation. It also calculates typical descriptive statistics, including the mean, standard deviation, reliability, and standard error of measurement, for each domain and the overall tests. It calculates the proportion and point biserial of each item, as well as high/low subgroup proportions. Iteman is a commercial program specifically designed for classical test analysis, utilizing text files for both input and output.
ITEMQUAL is available as a free download from Iteman It requires Java 1.6 (either JVM or JRE) on the host computer. ITEMQUAL graphics include nonparametric item characteristic curve estimation, boxplot, and density estimation. DIF effect sizes and ETS DIF classifications are included in the output. The DIF analysis is based on the Mantel-Haenszel statistics and it support binary and polytomous items. Reliability coefficients include Cronbach's alpha, a confidence interval for Cronbach's alpha, decision consistency indices using Huynh Huynh's method, and the conditional standard error of measurement. The item analysis includes proportion, point biserial, and biserial statistics for all response options.
Patrick Meyer at the University of Virginia. ITEMQUAL is free software for conducting a classical item analysis and differential item functioning (DIF) analysis. Item responses (ABCD) and keys are typed or pasted into the workbook, and the output automatically populates unlike other programs, CITAS does not require any "running" or experience in psychometric analysis, making it accessible to school teachers and professors.
Important source websites for free psychometric software include: