Skip to main content

Methodological and empirical developments for the Ratcliff diffusion model of response times and accuracy

The full text article is temporarily unavailable.

We apologise for the inconvenience. Please try again later.


The Ratcliff diffusion model for simple two-choice decisions (e.g., Ratcliff, 1978; Ratcliff & McKoon, 2008) has two outstanding advantages. First, the model generally provides an excellent fit to the observed data (i.e., response accuracy and the shape of RT distributions, both for correct and error responses). Second, the parameters of the model can be mapped on to latent psychological processes such as the speed of information accumulation, response caution, and a priori bias. In recent years, the advantages of the Ratcliff diffusion model have become increasingly clear. Current advances in methodology allow all researchers to fit the diffusion model to data easily. Recent applications to ageing, lexical decision, IQ, practice, the implicit association test, and the accessory stimulus effect serve to highlight the added value of a diffusion model perspective on simple decision making.

Keywords: Mathematical modelling; RT distributions; Random walk; Signal-detection theory

Document Type: Research Article


Affiliations: University of Amsterdam, Amsterdam, The Netherlands

Publication date: July 1, 2008


Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more