Generate or Upload Item Parameters / Responses & Run CAT Simulations

Your results will be here after you submit your request.
Simulations may take time according to your dataset.


IRT Calibration

Yen's Q3 Statistics for Local Independency

You can download results below

You can find item parameter and response sample files below.

This is a demo app. If you have any question please contact: erencan {at}

Item parameter sample file
Response pattern sample file

We do not keep any of the files and results on our servers.


Chalmers, R.P. (2012). mirt: A multidimensional item response theory package for the R environment. Journal of Statistical Software, 48(6), 1-29. doi:10.18637/jss.v048.i06

Magis, D. & Raiche, G. (2012). Random generation of response patterns under computerized adaptive testing with the R package catR. Journal of Statistical Software, 48(8), 1-31. doi:10.18637/jss.v048.i08

Magis, D. & Barrada, J.R. (2017). Computerized adaptive testing with R: Recent updates of the package catR. Journal of Statistical Software, Code Snippets, 76(1), 1-19. doi:10.18637/jss.v076.c01

Chang, W., Cheng, J., Allaire, J.J., Xie, Y., & McPherson, J. (2018). shiny: Web application framework for R. R package version 1.2.0.


Aybek, E.C. (2021). catIRT tools: A "Shiny" application for item response theory calibration and computerized adaptive testing simulation. Journal of Applied Testing Technology, 22(1). 12-24.