Fast-DM: Fast Diffusion Model Analysis

By Jochen Voss, last updated 2011-08-31

This page contains some information about the program fast-dm. Please note that this is not the official homepage.

Introduction

Fast-dm is a programm for fast parameter estimation in Ratcliff's (1978) diffusion model. With a Diffusion model data analysis it is possible to analyse data from any fast binary decision task. A diffusion-model data analysis is based on the distributions of both correct and erroneous responses. From these distributions a set of parameters is estimated that allows to draw conclusions about the underlying cognitive processes (Voss, Rothermund, & Voss, 2004).

The implemented algorithm and a bit of background is described in the first of the following two articles, the program itself is described in the second one.

A. Voss and J. Voss: A Fast Numerical Algorithm for the Estimation of Diffusion-Model Parameters. Journal of Mathematical Psychology, vol. 52, pp. 1–9, 2008.
DOI:10.1016/j.jmp.2007.09.005, preprint:pdf, more…
A. Voss and J. Voss: Fast-Dm: a Free Programm for Efficient Diffusion Model Analysis. Behavior Research Methods, vol. 39, no. 4, pp. 767–775, 2007.
link, preprint:pdf, more…

Download

Below is the fast-dm source for download. We offer .tar.gz and .zip archives, the contents of both are identical. Installation instructions are in the file README.

fast-dm version 30.2, 2015-04-17 (bug fix release)

This release fixes some memory leaks found by Valgrind.

archive: fast-dm-30.2.tar.gz (152KB)
signature: fast-dm-30.2.tar.gz.asc
sha1: 27ad543c1e77198745230f78be872f03801c7a46
md5: 36448517928148f2246189983a8afee4

fast-dm version 29, 2008-01-13 (bug fix release)

This fixes a problem where for fixed value of z large values of sz where not correctly recognised.

archive: fast-dm-29.tar.gz (128KB)
signature: fast-dm-29.tar.gz.asc
sha1: f04bbc8a7f2d52a56c6bedd902a3c2a62b1203dc
md5: cde6a41e69c7b96f30ab60add560ec1e
archive: fast-dm-29.zip (144KB)
signature: fast-dm-29.zip.asc
sha1: 7a36e74b61580ce40bff8f8ea3cdf40f46792913
md5: 148bc48a586710262c224b89065a7a17

fast-dm version 28, 2007-12-11

This fixes a bug introduced in fast-dm release 27. As a nice side-effect the program is now faster for some parameter settings.

archive: fast-dm-28.tar.gz (127KB)
signature: fast-dm-28.tar.gz.asc
sha1: 5ebfd5602a8ef9cb1b756fcacd406b28c400e723
md5: 2f469285273b4020a20cc0b759627c51
archive: fast-dm-28.zip (143KB)
signature: fast-dm-28.zip.asc
sha1: 43fbf0131b20c22ed490251bc7542f681c6b8f83
md5: 795106dc92414495873ca0f11f607fb5

fast-dm version 26, 2007-03-09

archive: fast-dm-26-win32.zip (103KB)
signature: fast-dm-26-win32.zip.sig
sha1: 826b990f758a6a82593ed173df1882115f74d9c0
md5: b1df819b5c5ba3ec103700057e9692b5
archive: fast-dm-26.tar.gz (125KB)
signature: fast-dm-26.tar.gz.sig
sha1: 1ae9d98d71f5e9497ff40163e2b7d835e0f21d35
md5: d9a3731e632b05586209bdb784e3fa32
archive: fast-dm-26.zip (149KB)
signature: fast-dm-26.zip.sig
sha1: b97b76fe91744cb65837aec511dc82ba3d7f63ec
md5: 01e7e1bb9db68420cf3661986ffd2513

fast-dm version 18, 2006-10-29

archive: fast-dm-18.tar.gz (108KB)
signature: fast-dm-18.tar.gz.sig
sha1: 50c036af5b2ae1a65d7310f1433966da9284c9f9
md5: b36c45f739d683c43f24ddbceafed091
archive: fast-dm-18.zip (126KB)
signature: fast-dm-18.zip.sig
sha1: 965f7273a854d35aa8a4c05788347497cae3b837
md5: 68f8fe17e679548fdd51eff70aaf137b

References

R. Ratcliff: A theory of memory retrieval. Psychological Review, vol. 85, no. 2, pp. 59-108, 1978.
link
R. Ratcliff and J.N. Rouder: Modeling response times for two-choice decisions. Psychological Science, vol. 9, no. 5, pp. 347-356, 1998.
DOI:10.1111/1467-9280.00067
A. Voss, K. Rothermund and J. Voss: Interpreting the Parameters of the Diffusion Model: An Empirical Validation. Memory & Cognition, vol. 32, no. 7, pp. 1206–1220, 2004.
link, preprint:pdf, more…
E.-J. Wagenmakers, H.L.J. van der Maas and R.P.P.P. Grasman: An EZ-Diffusion Model for Response Time and Accuracy. Psychonomic Bulletin & Review, vol. 14, no. 1, pp. 3–22, 2007.
link
A. Voss and J. Voss: A Fast Numerical Algorithm for the Estimation of Diffusion-Model Parameters. Journal of Mathematical Psychology, vol. 52, pp. 1–9, 2008.
DOI:10.1016/j.jmp.2007.09.005, preprint:pdf, more…
A. Voss and J. Voss: Fast-Dm: a Free Programm for Efficient Diffusion Model Analysis. Behavior Research Methods, vol. 39, no. 4, pp. 767–775, 2007.
link, preprint:pdf, more…