A ballistic model of choice response time.
Almost all models of response time (RT) use a stochastic accumulation process. To account for the benchmark RT phenomena, researchers have found it necessary to include between-trial variability in the starting point and/or the rate of accumulation, both in linear (R. Ratcliff & J. N. Rouder, 1998) and nonlinear (M. Usher & J. L. McClelland, 2001) models. The authors show that a ballistic (deterministic within-trial) model using a simplified version of M. Usher and J. L. McClelland's (2001) nonlinear accumulation process with between-trial variability in accumulation rate and starting point is capable of accounting for the benchmark behavioral phenomena. The authors successfully fit their model to R. Ratcliff and J. N. Rouder's (1998) data, which exhibit many of the benchmark phenomena.
Brown
Scott
S
Department of Cognitive Sciences, University of California, Irvine, CA 92697-5100, USA. scottb@uci.edu
Heathcote
Andrew
A
D002755:Choice Behavior; D006801:Humans; D008960:Models, Psychological; D011930:Reaction Time; D013269:Stochastic Processes