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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: Neuropsychologia. 2018 Jan 29;111:26–35. doi: 10.1016/j.neuropsychologia.2018.01.014

Figure 1.

Figure 1

Architecture of the diffusion model of conflict tasks (DMC). The decision process is the sum of automatic and goal-directed decision activations. The goal-directed decision activation X(t) is similar to the standard drift diffusion model. The automatic decision activation Xa(t) has a pulse-like gamma shape. b: correct decision threshold (incorrect threshold is at –b); v: drift rate of the goal-directed process; A: peak amplitude of the gamma function; Sonset: suppression onset, corresponding to the peak latency of the gamma function [Sonset = τ(a − 1)]; t90th: 90th percentile of the gamma percent point function (i.e., the latency at which 90% of the gamma automatic activation has been emitted); Sstrength: suppression strength, defined as t90th - Sonset.