Fast-DM

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

Introduction

Fast-dm is a program 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 Program 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.

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

Version 29 (2008-01-13) - Bug Fix Release

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

• Archive: fast-dm-29.tar.gz (128KB) | fast-dm-29.zip (144KB)
• Signature: fast-dm-29.tar.gz.asc | fast-dm-29.zip.asc
• SHA1: f04bbc8a7f2d52a56c6bedd902a3c2a62b1203dc (tar.gz) | 7a36e74b61580ce40bff8f8ea3cdf40f46792913 (zip)
• MD5: cde6a41e69c7b96f30ab60add560ec1e (tar.gz) | 148bc48a586710262c224b89065a7a17 (zip)

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) | fast-dm-28.zip (143KB)
• Signature: fast-dm-28.tar.gz.asc | fast-dm-28.zip.asc
• SHA1: 5ebfd5602a8ef9cb1b756fcacd406b28c400e723 (tar.gz) | 43fbf0131b20c22ed490251bc7542f681c6b8f83 (zip)
• MD5: 2f469285273b4020a20cc0b759627c51 (tar.gz) | 795106dc92414495873ca0f11f607fb5 (zip)

Version 26 (2007-03-09)

• Archive: fast-dm-26-win32.zip (103KB) | fast-dm-26.tar.gz (125KB) | fast-dm-26.zip (149KB)
• Signature: fast-dm-26-win32.zip.sig | fast-dm-26.tar.gz.sig | fast-dm-26.zip.sig
• SHA1: 826b990f758a6a82593ed173df1882115f74d9c0 (win32) | 1ae9d98d71f5e9497ff40163e2b7d835e0f21d35 (tar.gz) | b97b76fe91744cb65837aec511dc82ba3d7f63ec (zip)
• MD5: b1df819b5c5ba3ec103700057e9692b5 (win32) | d9a3731e632b05586209bdb784e3fa32 (tar.gz) | 01e7e1bb9db68420cf3661986ffd2513 (zip)

Version 18 (2006-10-29)

• Archive: fast-dm-18.tar.gz (108KB) | fast-dm-18.zip (126KB)
• Signature: fast-dm-18.tar.gz.sig | fast-dm-18.zip.sig
• SHA1: 50c036af5b2ae1a65d7310f1433966da9284c9f9 (tar.gz) | 965f7273a854d35aa8a4c05788347497cae3b837 (zip)
• MD5: b36c45f739d683c43f24ddbceafed091 (tar.gz) | 68f8fe17e679548fdd51eff70aaf137b (zip)

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 Program for Efficient Diffusion Model Analysis. Behavior Research Methods, vol. 39, no. 4, pp. 767–775, 2007. link, preprint (pdf), more…