DMAT is short for the Diffusion Model Analysis Toolbox. It is a MATLAB™ toolbox for fitting the Ratcliff Diffusion Model to reaction time and accuracy data. The current release of DMAT is version 0.4 (11 apr 2007).


The DMA Toolbox was created by Joachim Vandekerckhove and Francis Tuerlinckx of the Research Group of Quantitative Psychology and Individual Differences of the Katholieke Universiteit Leuven.


  • Ratcliff, R. (1978). A theory of memory retrieval. Psychological Review. 85(2), 59-108.
  • Ratcliff, R., & Tuerlinckx, F. (2002). Estimating parameters of the diffusion model: Approaches to dealing with contaminant reaction times and parameter variability. Psychonomic Bulletin & Review, 9, 438-481. PDF
  • Vandekerckhove, J., & Tuerlinckx, F. (2007). Fitting the Ratcliff diffusion model to experimental data. Psychonomic Bulletin & Review, 14, 1011-1026. doi:10.3758/PBR.15.6.1229 PDF


Information on how to use DMAT can be found in the included documentation, and an introduction to the toolbox can be found in this article:

Getting DMAT


The download package is a ZIP file that you need to unpack in your MATLAB™ toolbox directory (if you are unable to, any directory will do). Note that you need to use WinZip's "Extract" button in order to preserve the internal file structure (do not "drag" the files to a specific location on your hard disk). The package contains a collection of .m, .c, .png and .html files, and other files that together make up the DMA Toolbox. It also contains a file called readme_first.txt, which contains more detailed instructions on how to add the DMA toolbox to your MATLAB™ installation.


The Diffusion Model Analysis Toolbox (DMAT) is offered free of charge to anyone interested in using diffusion models, provided that you properly cite the software and the paper mentioned above and that it is not used for financial profit. Requests to use DMAT for any commercial purpose must be directed to the authors. DMAT comes without any warranty of any kind. You are not allowed to redistribute a downloaded copy of DMAT to others. If you want others to use DMAT, refer them to this website. See here for full license information.


To get the software, you have to fill out your name and e-mail address in a form. After submitting that information, an e-mail containing the address you can download the software once will be sent to you. Click here to proceed to the download area.