Notable websites and resources offering such software include:: There is also an R Shiny tool for reproducible Rasch analysis, differential item functioning, equating, and examination of group effects.
Additionally, an increasing number of packages for R can be found in the CRAN Task View: Psychometric Models and Methods.
Autopsych is a free and open-source web app with multiple features for conducting Classical Test Theory (CTT) and Rasch modeling.
Users can type or paste item responses (ABCD) and keys into the workbook, and the output is automatically populated.
Unlike some other programs, CITAS does not require any 'running' or experience in psychometric analysis, making it accessible to teachers and professors.
jMetrik is free and open-source software for conducting comprehensive psychometric analysis, developed by J. Patrick Meyer at the University of Virginia.
The app adopts marginal maximum likelihood estimation and leverages off a total 31 open-source R packages (including TAM, psych, knitr, etc.).
Users upload item-response matrices (.csv files), customize settings for Rasch analysis, and the app automatically generates PDF with embedded narration for methodology and results.
[2] BILOG-MG is a software program for IRT analysis of dichotomous (correct/incorrect) data, including fit and differential item functioning.
Dexter, first published February 2017, is an R package intended as a robust and fairly comprehensive system for managing and analyzing test data organized in booklets.
jMetrik is a pure Java application that runs on 32-bit and 64-bit versions of Windows, Mac, and Linux operating systems.
Xcalibre is a commercial program that performs marginal maximum likelihood estimation of both dichotomous (1PL-Rasch, 2PL, 3PL) and all major polytomous IRT models.
Its output includes both spreadsheets and a detailed, narrated report document with embedded tables and figures, which can be printed and delivered to subject matter experts for item review.
IATA reads and writes csv, Excel and SPSS file formats, and produces exportable graphics for all statistical analyses.
Analysis of multivariate dichotomous and polytomous data using latent trait models under the Item Response Theory approach.
It includes the Rasch, the Two-Parameter Logistic, the Birnbaum's Three-Parameter, the Graded Response, and the Generalized Partial Credit Models.
ACER ConQuest is a computer program for fitting both unidimensional and multidimensional item response and latent regression models.
[6] The program can handle independent variables, multidimensional ability parameters, incomplete data, and complex sampling.
LinkMIRT is a free Java application program that links two sets of item parameters in a multidimensional IRT (MIRT) framework.
The software offers IRT parameter and person estimation (MLE, MAP, EAP, TCC, and bifactor models), parameter and person estimation under two common cognitive diagnostic models (DINA/DINO), test construction environment including automated test assembly, six test equating approaches based on common-item designs, error-in-variables linear regressions including fixed and mixed effects models, classical item analysis, differential item function via the Mantel-Haenszel Procedure, item mapping procedures, interactive data exploration and basic statistical analysis, computation of reliability using Cronbach's alpha, stratified alpha, and Feldt-Raju along with jack-knife variances, classical item analysis of test items, IRT-based fit statistics including item fit plots, Regularized Regressions (elastic net, ridge, lasso), Yen's Q1 and Q3 statistics, classification consistency and classification accuracy methods, and direct estimation procedures as used in NAEP-style analyses.
SimuMIRT is a program that simulates multidimensional data (examinee ability and item responses) for a fixed form (i.e., paper and pencil) test, from a user-specified set of parameters.
SimuMCAT is a free Java application program that simulates a multidimensional computer adaptive test (MCAT).
IRTEQ is a freeware Windows GUI application that implements IRT scaling and equating developed by Kyung (Chris) T. Han.
[8][9][10][11][12] For TCC methods, IRTEQ provides the user with the option to choose various score distributions for incorporation into the loss function.
It was developed by Tie Liang, Kyung (Chris) T. Han, and Ronald K. Hambleton at the University of Massachusetts Amherst.
Iteman provides an index of decision consistency as well as a classical estimate of the conditional standard error of measurement at the cut score, which is often requested for accreditation of a testing program.
SIFT is designed for data forensics, namely, finding evidence of cheating or other behaviour that threatens the validity and integrity of the test.
Copy Detect is an R package that is designed for data forensics, namely, finding evidence of cheating or other behaviour that threatens the validity and integrity of the test.
Basic R functionality can be extended through installing contributed 'packages', and a list of psychometric related packages is maintained on the CRAN website.
It is driven by a control panel that allows the user to specify the model, examine fit numerically and graphically and investigate differential item functioning from a single interface.