dRiftDM

The R-package dRiftDM offers a flexible tool for working with simple and advanced time-dependent diffusion models within a common framework.

dRiftDM offers predefined models such as the Ratcliff (1978, Psychological Review) diffusion model, the Diffusion Model for Conflict tasks by Ulrich et al. (2015, Cognitive Psychology), and the Shrinking Spotlight Model by White et al. (2011, Cognitive Psychology). A core feature of dRiftDM is, however, that it allows flexible building of own diffusion models with time-dependent parameters (i.e., drift rate and decision boundary). The underlying mathematical framework builds on work by Richter, Ulrich, and Janczyk (2023, Journal of Mathematical Psychology).

A basic introduction into the functionality of dRiftDM is available on its Github-page. A more thorough theoretical, conceptual, and matheamtical introduction into random walks, diffusion models, estimation, and practical work with dRiftDM can be found in our online book "Modeling Experimental Data with (Time-Dependent) Diffusion Models: Basics and Application with dRiftDM" authored by Markus Janczyk and Valentin Koob.