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. Author manuscript; available in PMC: 2009 Dec 23.
Published in final edited form as: Psychon Bull Rev. 2009 Aug;16(4):742–751. doi: 10.3758/PBR.16.4.742

Figure 2.

Figure 2

Illustration of the diffusion model with starting point z, boundary separation a, and drift rate v. Three sample paths are shown, illustrating variability within the decision process, and correct and error response time (RT) distributions are illustrated.