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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: Neurosci Biobehav Rev. 2015 Apr 28;55:88–97. doi: 10.1016/j.neubiorev.2015.04.006

Figure 3.

Figure 3

Schematic representation of the diffusion (A) and 2DSD model (B). A. Diffusion model: The black jagged line depicts the accumulation process when the observer chooses alternative B. The boundaries (b1 and b2) are arbitrarily set by the observer as a decision criterion. B. 2DSD model. In this model the accumulation continues after the decision is taken to give a confidence judgment (time 2). Modified from (Pleskac and Busemeyer, 2010).