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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: J Exp Psychol Hum Percept Perform. 2011 Feb;37(1):58–71. doi: 10.1037/a0020747

Figure 8.

Figure 8

The ex-Wald distribution is the combination of the Wald distribution and the Exponential distribution. The Wald component models the finishing time distribution of a diffusion process in which information accumulates over time towards an absorbing decision boundary. The exponential component is intended to capture residual processes, such as motor response times.