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. Author manuscript; available in PMC: 2017 Nov 16.
Published in final edited form as: J Exp Psychol Hum Percept Perform. 2013 May 6;39(6):1731–1740. doi: 10.1037/a0032333

Figure 1.

Figure 1

Representation of the diffusion model. Panel A shows a representation of the sequence of events in a trial of a lexical decision task. Panel B represents the nondecisional components of the response time (RT), which have a mean expressed by the Ter parameter and a range expressed by the st parameter. Panel C illustrates the diffusion model. The parameters represented in Panel C are a: boundary separation; z: starting point; sz: variability in starting point across trials; v: drift rate; η: variability in the drift rate across trials; and s: variability in drift rate within a trial.